Leg : 55 Top/Bottom Interval(mm): 300/ 380 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 181.50 Rock Type: IGNEOUS
Core: 4 Sample Midpoint(m) : 181.84 Sect/Pc #: 1/
ROCK = PLAG-OL-CPX-MAGN PHYRIC BASALT
ALKALIC BASALT, SOURCE IS IR, 7% ALTERED;
Texture: PHYRIC,MICROLITIC,INTERGRANULAR*
Phenocrysts- PLAGIOCLASE ( 12%)
Size(mm): 1.44
OLIVINE ( 7%)
Size(mm): 2.16
RARE LARGE OL HAVE KINK-BANDS,OL PHENOS CONTAIN
CHROMITE THAT IS ZONED TO CHROME-RICH TITANO-MAGN
ON RIMS;
MAGNETITE ( <1%)
Size(mm): 0.46
CLINOPYROXENE ( 2%)
Size(mm): 1.15
Groundmass - PLAGIOCLASE ( 44%)
Size(mm): .02-1.70
CLINOPYROXENE ( 22%)
Size(mm): .005-.50
TITANOMAGNETITE ( 7%)
Size(mm): .003-.20
OLIVINE ( 5%)
Size(mm): .01-.50
ALTERED TO OLIVE BROWN SMECTITE ON RIMS AND
CRACKS,CHLORITE(?) PRESENT;
ILMENITE ( <1%)
Size(mm): .03-.06
PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - SMECTITE
Replacing: OL
CHLORITE
Replacing: OL
ID UNCERTAIN FOR CHLORITE*
Leg : 55 Top/Bottom Interval(mm): 390/ 410 Describer: Dalrymple, G.
Hole: 433C Top of Core Depth(m) : 181.50 Rock Type: IGNEOUS
Core: 4 Sample Midpoint(m) : 181.90 Sect/Pc #: 1/PCE 2C
ROCK = OL-PLAG-CPX PHYRIC BASALT
ANKARAMITE;
Texture: PORPHYRITIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 5%)
Size(mm): 1-3 Morphology: SUBHEDRAL
30-50% ALTERED TO CLAYS;
PLAGIOCLASE ( 3%)
Size(mm): 0.2-3 Morphology: SUBHEDRAL LATHS
SOME COMPLEX TWINNED, AGGREGATES;
CLINOPYROXENE ( 2%)
Size(mm): 0.2-3 Morphology: SUBHEDRAL
VERY PALE BROWN,ZONED,FRESH*
Groundmass - OLIVINE ( 0%)
PLAGIOCLASE ( 50%)
Size(mm): 0.05-0.2 Morphology: LATHS
FRESH;
CLINOPYROXENE ( 15%)
Size(mm): 0.05-0.2 Morphology: GRANULAR
COLORLESS,2-3% MICROPHENOS OF PALE BROWN CPX;
OPAQUE MINERALS ( 7%)
Size(mm): 0.01-0.1 Morphology: EQUANT
INCLUDES MAGN+ILMENITE;
APATITE ( 1%)
Morphology: ACICULAR NEEDLES
Alteration - CLAY MINERALS ( 5%)
Location: GROUNDMASS Replacing: OL
GREEN TO BROWN CLAYS*
Vesicles -
Percent: 0
Leg : 55 Top/Bottom Interval(mm): 20/ 90 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 187.00 Rock Type: IGNEOUS
Core: 5 Sample Midpoint(m) : 187.06 Sect/Pc #: 1/
ROCK = OL-PLAG-CPX PHYRIC BASALT
ALKALIC BASALT, SOURCE IS IR, 16% ALTERED;
Texture: PHYRIC,INTERGRANULAR*
Phenocrysts- OLIVINE ( 7%)
Size(mm): 2.40
RARE LARGE OL HAVE KINK-BANDS;
PLAGIOCLASE ( 7%)
Size(mm): 1.71
CLINOPYROXENE ( 4%)
Size(mm): 1.50
Groundmass - PLAGIOCLASE ( 45%)
Size(mm): .03-.50
CLINOPYROXENE ( 22%)
Size(mm): .005-.50
OLIVINE ( 7%)
Size(mm): .03-.50
ALTERED TO IDDINGSITE AND OLIVE SMECTITE ON RIMS
AND CRACKS,CHLORITE(?) PRESENT;
MAGNETITE ( 7%)
Size(mm): .001-.10
ILMENITE ( 1%)
Size(mm): .01-.34
PHILLIPSITE
IDENTIFIED BY XRD,PERCENTAGES OBTAINED BY POINT
COUNT*
Alteration - CHLORITE
ID UNCERTAIN FOR CHLORITE;
PHILLIPSITE
IDDINGSITE
Replacing: OL
SMECTITE
Location: RIMS Replacing: OL
OLIVE*
Leg : 55 Top/Bottom Interval(mm): 760/ 790 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 190.00 Rock Type: IGNEOUS
Core: 6 Sample Midpoint(m) : 192.28 Sect/Pc #: 2/
ROCK = PLAG MOD PHYRIC BASALT
ALKALIC BASALT, SOURCE IS IR, 10-15% ALTERED;
Texture: MOD PHYRIC,PILOTAXITIC*
Phenocrysts- PLAGIOCLASE ( 2%)
Size(mm): 1.48
Groundmass - PLAGIOCLASE (30-35%)
Size(mm): .005-.75
CLINOPYROXENE (25-30%)
Size(mm): .001-.50
MAGNETITE (18-20%)
Size(mm): .001-.10
OLIVINE (12-15%)
Size(mm): .003-.50
COMPLETELY REPLACED BY SMECTITE AND IDDINGSITE;
ILMENITE ( 1-2%)
Size(mm): .005-.01
APATITE ( 1%)
Size(mm): TO .01
PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - SMECTITE
Replacing: OL
IDDINGSITE
Replacing: OL
Vesicles -
Size(mm): .15-.77
Percent: 1
Shape: ELLIPTICAL
Leg : 55 Top/Bottom Interval(mm): 70/ 90 Describer: Avdeiko, G.
Hole: 433C Top of Core Depth(m) : 204.50 Rock Type: IGNEOUS
Core: 10 Sample Midpoint(m) : 204.58 Sect/Pc #: 1/PCE 1A
ROCK = OL MOD PHYRIC BASALT
ROCK IS EXTENSIVELY ALTERED;
Texture: PORPHYRITIC,MICROLITIC-MICRODIABASIC
MICRODIABASIC IN FRESH PARTS*
Phenocrysts- OLIVINE ( 8-10%)
Size(mm): 0.5-2.5 Morphology: EUHEDRAL-ANHEDRAL
COMPLETELY ALTERED*
Groundmass - OLIVINE ( 5-7%)
Size(mm): 0.1-0.2
PLAGIOCLASE ( 50%)
Size(mm): 0.1-0.3 Morphology: LATHS
NEARLY COMPLETELY ALTERED, RARE FRESH PARTS UP TO
1-1.5MM WITH FRESH PLAG LATHS APPROX 60% OF
GROUNDMASS;
CLINOPYROXENE ( 15%)
Size(mm): 0.02-0.1
FRESH,PARTLY ALTERED TO CLAYS;
GLASS
UNSURE IF GLASS IS IN GROUNDMASS*
Alteration - CLAY MINERALS (65-70%)
Location: VESICLES Replacing: OL,PLAG,CPX
PARTLY CPX;
ZEOLITE (10-15%)
Location: VESICLES-
Location: CENTRAL PART
IDDINGSITE ( 3-5%)
Replacing: OL
Vesicles -
Size(mm): 0.3-3.0
Filling: CLAY.MINS,
Shape: ROUNDED,
Filling: ZEOLITES
Shape: IRREGULAR
CLAYS USUALLY ON VESICLE WALLS*
Leg : 55 Top/Bottom Interval(mm): 150/ 180 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 204.50 Rock Type: IGNEOUS
Core: 10 Sample Midpoint(m) : 206.17 Sect/Pc #: 2/PCE 3A
ROCK = OL MOD PHYRIC BASALT
ROCK IS EXTENSIVELY ALTERED;
Texture: PORPHYRITIC,SUBOPHITIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 8%)
Size(mm): 0.5-3 Morphology: EUHEDRAL
ALTERED TO CLAY WITH IDDINGS RIMS*
Groundmass - OLIVINE ( 5%)
Size(mm): 0.1-0.5 Morphology: EUHEDRAL,SUBHEDRAL
ALTERED TO IDDINGS+CLAY;
PLAGIOCLASE ( 20%)
Size(mm): 0.1-0.5 Morphology: LATH
50% ALTERED TO CLAY.MIN;
CLINOPYROXENE ( 15%)
Size(mm): 0.1-0.5 Morphology: ANHEDRAL
OPAQUE MINERALS ( 10%)
Size(mm): 0.05-0.2 Morphology: ANHEDRAL
INCLUDES MAGN+ILMENITE,SOME PRIMARY,
SOME SECONDARY*
Alteration - CLAY MINERALS ( 28%)
Location: GROUNDMASS Replacing: GLASS,OL,PLAG
30% AFTER OL+PLAG;
CARBONATE
Replacing: OL
2% COUNTED AS OL*
Vesicles -
Size(mm): .5 TO >5
Percent: 20
Location: THROUGHOUT
Filling: CLAY.MINS
Shape: OVAL,
Shape: IRREGULAR
Leg : 55 Top/Bottom Interval(mm): 460/ 540 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 204.50 Rock Type: IGNEOUS
Core: 10 Sample Midpoint(m) : 206.50 Sect/Pc #: 2/
ROCK = OL MOD PHYRIC BASALT
OL THOLEIITE, SOURCE IS IR, 42% ALTERED;
Texture: MOD PHYRIC,OPHITIC-SUB-OPHITIC*
Phenocrysts- OLIVINE ( 8%)
Size(mm): 1.49
Groundmass - PLAGIOCLASE ( 43%)
Size(mm): .01-.55
MOSTLY REPLACED BY SMECTITE AND K-FELDSPAR;
CLINOPYROXENE ( 37%)
Size(mm): .01-.55
SOME ALTERED TO AMPHIBOLE(?);
OLIVINE ( 7%)
Size(mm): .01-.48
COMPLETELY REPLACED BY SMECTITE AND IDDINGSITE,
CHLORITE(?)PRESENT;
MAGNETITE ( 4%)
Size(mm): .001-.01
ILMENITE ( 1%)
Size(mm): .01-.15
PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - SMECTITE
Replacing: OL
IDDINGSITE
Replacing: OL
CHLORITE
Replacing: OL
ID UNCERTAIN FOR CHLORITE*
Vesicles -
Size(mm): .55-7.48
Percent: 26
Filling: SMECTITE
Shape: IRREGULAR
LINED WITH FIBROUS PALE GREEN SMECTITE*
Leg : 55 Top/Bottom Interval(mm): 560/ 590 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 204.50 Rock Type: IGNEOUS
Core: 10 Sample Midpoint(m) : 206.58 Sect/Pc #: 2/PCE 7
ROCK = OL MOD PHYRIC BASALT
ROCK IS EXTENSIVELY ALTERED;
Texture: PORPHYRITIC,SUBOPHITIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 5%)
Size(mm): 0.5-2 Morphology: EUHEDRAL
TOTALLY ALTERED TO CLAY.MINS WITH IDDINGS RIMS*
Groundmass - OLIVINE ( 5%)
Size(mm): 0.1-0.5 Morphology: EUHEDRAL-SUBHEDRAL
COMPLETELY ALTERED TO IDDINGS;
PLAGIOCLASE ( 25%)
Size(mm): 0.1-0.8 Morphology: LATHS,SKELETAL
APPROX 50% ALTERED TO SERICITE;
CLINOPYROXENE ( 15%)
Size(mm): 0.1-0.3 Morphology: SUBOPHITIC
MOSTLY FRESH;
OPAQUE MINERALS ( 10%)
Size(mm): 0.05-0.5
INCLUDES MAGN+ILMENITE,MOSTLY SECONDARY*
Alteration - CLAY MINERALS ( 10%)
Location: GROUNDMASS Replacing: GLASS,OL,PLAG
40% REPLACING OL+PLAG*
Vesicles -
Size(mm): 1-8
Percent: 30
Location: THROUGHOUT
Filling: CLAY
Shape: ROUND,
Shape: IRREGULAR
Leg : 55 Top/Bottom Interval(mm): 1360/1430 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 204.50 Rock Type: IGNEOUS
Core: 10 Sample Midpoint(m) : 207.39 Sect/Pc #: 2/
ROCK = OL SPARSELY PHYRIC BASALT
THOLEIITE, SOURCE IS IR, 22% ALTERED;
Texture: SPARSELY PHYRIC,SUB-OPHITIC*
Phenocrysts- OLIVINE ( 2%)
Size(mm): .90
Groundmass - PLAGIOCLASE ( 55%)
Size(mm): .01-1.22
ABOUT HALF ALTERED TO SMECTITE;
CLINOPYROXENE ( 27%)
Size(mm): .01-.50
SOME ALTERED TO AMPHIBOLE;
OLIVINE ( 10%)
Size(mm): .01-.50
COMPLETELY REPLACED BY SMECTITE AND IDDINGSITE;
MAGNETITE ( 4%)
Size(mm): .005-.10
ILMENITE ( 3%)
Size(mm): .01-.20
PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - SMECTITE
Replacing: OL
IDDINGSITE
Replacing: OL
Vesicles -
Size(mm): .51-8.20
Percent: 33
Shape: IRREGULAR-
Shape: OVOID
Leg : 55 Top/Bottom Interval(mm): 1030/1060 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 204.50 Rock Type: IGNEOUS
Core: 10 Sample Midpoint(m) : 208.55 Sect/Pc #: 3/PCE 10A
ROCK = OL MOD PHYRIC BASALT
EXTENSIVELY ALTERED;
Texture: PORPHYRITIC,INTERGRANULAR-SUBOPHITIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 5%)
Size(mm): 0.5-2
TOTALLY REPLACED BY CLAY.MINS+IDDINGS*
Groundmass - OLIVINE ( 5%)
Size(mm): 0.05-0.5 Morphology: SUBHEDRAL
TOTALLY ALTERED,MOSTLY IDDINGS;
PLAGIOCLASE ( 30%)
Size(mm): 0.05-0.5 Morphology: LATHS,DKELETAL
APPROX 50% ALTERED TO SERICITE;
CLINOPYROXENE ( 20%)
Size(mm): 0.05-0.5 Morphology: ANHEDRAL
FRESH;
OPAQUE MINERALS ( 5%)
INCLUDES MAGN+ILMENITE, DIFFICULT TO DETERMINE
BECAUSE OF ALTERATION*
Alteration - CLAY MINERALS ( 15%)
Location: GROUNDMASS Replacing: OL,PLAG,GLASS
35% OR MORE REPLACED OL+PLAG,ID UNCERTAIN FOR
GLASS*
Vesicles -
Size(mm): 0.5->5
Percent: 20
Location: THROUGHOUT
Filling: EMPTY,CLAY,CALC
Shape: ROUND-OVAL
SOME CALCITE FILLED*
Leg : 55 Top/Bottom Interval(mm): 40/ 60 Describer: Avdeiko, G.
Hole: 433C Top of Core Depth(m) : 204.50 Rock Type: IGNEOUS
Core: 10 Sample Midpoint(m) : 209.05 Sect/Pc #: 4/PCE 2
ROCK = OL MOD PHYRIC BASALT
ROCK IS ALTERED;
Texture: VESICULAR,MICROLITIC;
Where sampled: TOP OF FLOW UNIT*
Phenocrysts- OLIVINE ( 3-4%)
Size(mm): 0.5-1.5 Morphology: EUHEDRAL
ALTERED TO IDDINGS*
Groundmass - OLIVINE ( 5-7%)
Size(mm): 0.03-0.4 Morphology: SUBHEDRAL
ALTERED TO IDDINGS;
PLAGIOCLASE ( 15%)
Size(mm): 0.2-0.5 Morphology: LATHS
0.2-0.5MM LONG, ALTERED TO CLAY IN CENTRAL PARTS
IN 50% OF THE PLAG;
CLINOPYROXENE ( 1%)
Size(mm): 0.02
MAY BE MORE CPX PRESENT BUT IT IS ALTERED;
OPAQUE MINERALS (10-12%)
Morphology: IRREGULAR
INTERSTITIAL WITH GLASS;
GLASS (15-20%)
DARK BRWON,DEVITRIFIED,ALTERED TO CLAY.MINS*
Alteration - CLAY MINERALS (30-35%)
Location: VESICLES Replacing: GLASS,PLAG,PYX
IDDINGSITE ( 9-10%)
Replacing: OLIVINE
Vesicles -
Percent: 45
Filling: CLAY
BROWN CLAYS LINES VESICLES*
Leg : 55 Top/Bottom Interval(mm): 110/ 170 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 204.50 Rock Type: IGNEOUS
Core: 10 Sample Midpoint(m) : 209.14 Sect/Pc #: 4/
ROCK = OL MOD PHYRIC BASALT
THOLEIITE, SOURCE IS IR, 31% ALTERED;
Texture: MOD PHYRIC,SUB-OPHITIC*
Phenocrysts- OLIVINE ( 3%)
Size(mm): 0.64
OL PHENOS CONTAIN CHROMITE THAT IS ZONED TO
CHROME-RICH TITANO-MAGN ON RIMS*
Groundmass - PLAGIOCLASE ( 41%)
Size(mm): .01-.95
ABOUT 50% REPLACED BY SMECTITE;
CLINOPYROXENE ( 32%)
Size(mm): .01-.20
PARTLY REPLACED BY AMPHIBOLE(?);
OLIVINE ( 19%)
Size(mm): .01-.50
COMPLETELY REPLACED BY SMECTITE AND IDDINGSITE;
TITANOMAGNETITE ( 3%)
Size(mm): .005-.05 Morphology: SKELETAL
EXSOLVED;
ILMENITE ( 3%)
Size(mm): .01-.16
FERROMAGNESIUM
SINGLE GRAIN OF MAGNESIOFERRITE,PERCENTAGES
PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - SMECTITE
IDDINGSITE
Vesicles -
Size(mm): .23-4.43
Percent: 25
Shape: IRREGULAR-
Shape: OVOID
Leg : 55 Top/Bottom Interval(mm): 440/ 460 Describer: Avdeiko, G.
Hole: 433C Top of Core Depth(m) : 204.50 Rock Type: IGNEOUS
Core: 10 Sample Midpoint(m) : 209.45 Sect/Pc #: 4/
ROCK = OL PHYRIC BASALT
ROCK IS ALTERED,SAME AS 55-433C-10-4-(118-120);
Texture: PORPHYRITIC-DIABASIC
PORPHYRITIC GROUNDMASS,DIABASIC WITH RADIATED
PARTS*
Phenocrysts- OLIVINE (40-45%)
Size(mm): 0.5-4 Morphology: EUHEDRAL,SUBHEDRAL
COMPLETELY ALTERED TO CLAYS WITH IDDINGS RIMS*
Groundmass - OLIVINE ( 5%)
Size(mm): 0.03-0.3 Morphology: EUHEDRAL,SUBHEDRAL
ALTERED TO CLAY.MINS+IDDINGS;
PLAGIOCLASE ( 20%)
Size(mm): TO 1.5 Morphology: LATHS
FRESH,PARTLY (5%) ALTERED;
CLINOPYROXENE ( 15%)
Size(mm): 0.1-0.5 Morphology: INTERSTITIAL
FRESH,INTERSTITIAL BETWEEN PLAG;
OPAQUE MINERALS ( 5%)
Morphology: EUHEDRAL,IRREGULAR
GLASS ( 2%)
Morphology: INTERSTITIAL
ALTERED TO CLAY.MINS*
Alteration - CARBONATE ( 2-3%)
Location: VESICLES Replacing: GLASS,OL
CLAY MINERALS (40-45%)
Location: VESICLES Replacing: GLASS,OL,PLAG
ZEOLITE (10-15%)
Location: VESICLES Replacing: GLASS
IDDINGSITE ( 5%)
Location: GROUNDMASS, Replacing: OL
Location: RIMS OF OL
Location: PHENOS
Vesicles -
Size(mm): 2-6
Percent: 10-15
Filling: ZEOLITES,CLAYS
Shape: ROUND
4X11MM LONG*
Leg : 55 Top/Bottom Interval(mm): 930/ 950 Describer: Avdeiko, G.
Hole: 433C Top of Core Depth(m) : 204.50 Rock Type: IGNEOUS
Core: 10 Sample Midpoint(m) : 209.94 Sect/Pc #: 4/PCE 6
ROCK = OL PHYRIC BASALT
ROCK IS ALTERED;
Texture: PORPHYRITIC,VITROPHYRIC,MICROLITIC
VITROPHYRIC GROUNDMASS WITH MICROLITES OF OP.MINS*
Phenocrysts- OLIVINE (20-25%)
Morphology: EUHEDRAL
ALTERED TO CLAY.MINS WITH IDDINGS RIMS*
Groundmass - OLIVINE ( 1-2%)
Size(mm): 0.1 Morphology: SUBHEDRAL
ALTERED TO IDDINGS;
PLAGIOCLASE ( <<1%)
Size(mm): TO 0.3 Morphology: MICROLITES
0.3MM LONG;
CLINOPYROXENE ( 1-2%)
Size(mm): 0.03-0.05 Morphology: GRAINS
FRESH;
OPAQUE MINERALS ( 10%)
Size(mm): .03X.5-.7 Morphology: MICROLITES,IRREGULAR GRAINS
GLASS ( 40%)
DARK,DEVITRIFIED,ALTERED TO ZEOLITE*
Alteration - ZEOLITE (40-45%)
Location: VESICLES Replacing: GLASS
IDDINGSITE ( 2-3%)
Location: OL RIMS Replacing: OL
Vesicles -
Size(mm): 0.5-3
Percent: 25
Filling: ZEOLITES
Shape: ROUND
Leg : 55 Top/Bottom Interval(mm): 1180/1200 Describer: Avdeiko, G.
Hole: 433C Top of Core Depth(m) : 204.50 Rock Type: IGNEOUS
Core: 10 Sample Midpoint(m) : 210.19 Sect/Pc #: 4/PCE 8B
ROCK = OL-PLAG PHYRIC DIABASIC BASALT
ROCK IS ALTERED,SAME AS 55-433C-10-4-(44-46);
Texture: PORPHYRITIC-DIABASIC
PORPHYRITIC GROUNDMASS,DIABASIC WITH RADIATED
PARTS*
Phenocrysts- OLIVINE (45-50%)
Size(mm): 0.3-4 Morphology: EUHEDRAL
COMPLETELY ALTERED TO CLAYS WITH IDDINGS AND
OP.MINS RIMS;
PLAGIOCLASE ( >1%)
Size(mm): 1.5 Morphology: ANHEDRAL
ALTERED (50-60%) TO CLAYS*
Groundmass - OLIVINE ( 3-5%)
Size(mm): 0.1-0.2 Morphology: EUHEDRAL,SUBHEDRAL
ALTERED TO IDDINGS;
PLAGIOCLASE (15-20%)
Size(mm): TO 1.5 Morphology: LATHS
FRESH,PARTLY ALTERED TO CLAYS;
CLINOPYROXENE (10-15%)
Morphology: INTERSTITIAL
FRESH;
OPAQUE MINERALS ( 5-7%)
Morphology: IRREGULAR
INCLUDES MAGN+ILMENITE,ALONG RIMS OF OL;
GLASS
ID UNCERTAIN FOR GLASS*
Alteration - CARBONATE ( 2%)
Replacing: OL,GLASS
CLAY MINERALS (40-45%)
Replacing: OL,PLAG,GLASS
ZEOLITE
Location: VESICLES Replacing: GLASS
ALL ID FOR GLASS UNCERTAIN;
IDDINGSITE ( 5%)
Replacing: OL
Vesicles -
Percent: 15
Filling: ZEOLITES
Shape: ROUNDED,
Shape: IRREGULAR
1-3 MM FOR ROUNDED, 2X5MM FOR IRREGULAR VESICLES*
Leg : 55 Top/Bottom Interval(mm): 110/ 130 Describer: Dalrymple, G.
Hole: 433C Top of Core Depth(m) : 204.50 Rock Type: IGNEOUS
Core: 10 Sample Midpoint(m) : 210.62 Sect/Pc #: 5/PCE 1B
ROCK = OL PHYRIC BASALT
VERY BADLY ALTERED,NOT RECOMMENDED FOR CHEMISTRY
OR DATING;
Texture: PORPHYRITIC*
Phenocrysts- OLIVINE ( 10%)
Size(mm): 0.5-3 Morphology: SUBHEDRAL
COMPLETELY REPLACED BY CLAY+IDDINGS+CALCITE;
Groundmass - OLIVINE ( 5%)
Size(mm): 0.05-0.5 Morphology: GRANULAR
ALTERED TO IDDINGS+CLAY;
PLAGIOCLASE ( 30%)
Size(mm): <0.01-0.5 Morphology: LATHS
CLINOPYROXENE (10-15%)
Size(mm): 0.02 Morphology: GRANULAR
COLORLESS;
OPAQUE MINERALS (10-15%)
Size(mm): <0.01-0.1 Morphology: EQUANT
INCLUDES MAGN+ILMENITE, MOSTLY EQUANT GRAINS*
Alteration - CARBONATE ( 10%)
Location: INTERSTITIAL, Replacing: OL
Location: FILLINGS
MOSTLY OL IN VUGS+VESICLES, OL(?);
CLAY MINERALS ( 20%)
Location: INTERSTITIAL, Replacing: OL,GLASS
Location: FILLINGS
PERVASIVE, GLASS(??);
ZEOLITE ( 5%)
Location: VESICLES
Vesicles -
Size(mm): 0.5-5
Percent: 20
Filling: CALC,CLAY,ZEOL
Shape: IRREGULAR
100% FILLED*
Leg : 55 Top/Bottom Interval(mm): 840/ 900 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 204.50 Rock Type: IGNEOUS
Core: 10 Sample Midpoint(m) : 211.37 Sect/Pc #: 5/
ROCK = OL SPARSELY PHYRIC BASALT
THOLEIITE, SOURCE IS IR, 43% ALTERED;
Texture: SPARSELY PHYRIC,OPHITIC*
Phenocrysts- OLIVINE ( 1%)
Size(mm): 1.13
Groundmass - PLAGIOCLASE ( 50%)
Size(mm): .01-.25
CLINOPYROXENE ( 40%)
Size(mm): .005-.25
OLIVINE ( 5%)
Size(mm): .01-.50
COMPLETELY REPLACED BY CALCITE+SMECTITE AND
IDDINGSITE;
MAGNETITE ( 4%)
Size(mm): 0.005-0.10
PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - CALCITE
Replacing: OL
SMECTITE
Replacing: OL
IDDINGSITE
Replacing: OL
Vesicles -
Size(mm): .20-2.35
Percent: 15
Filling: SMECTITE
Shape: IRREGULAR
MOST VESICLES ARE FILLED WITH FIBROUS YELLOW-GREEN
SMECTITE*
Leg : 55 Top/Bottom Interval(mm): 1190/1210 Describer: Dalrymple, G.
Hole: 433C Top of Core Depth(m) : 204.50 Rock Type: IGNEOUS
Core: 10 Sample Midpoint(m) : 211.70 Sect/Pc #: 5/PCE 13A
ROCK = OL SPARSELY PHYRIC BASALT
EXTENSIVELY ALTERED,NOT RECOMMENDED FOR CHEMISTRY
OR DATING;
Texture: PORPHYRITIC,INTERGRANULAR*
Phenocrysts- OLIVINE ( 1%)
Size(mm): 0.2-0.7 Morphology: SUBHEDRAL
ONLY 2 PHENOS IN THIN SECTION, BOTH ALTERED TO
IDDINGS+CLAY.MINS*
Groundmass - OLIVINE ( 7%)
Size(mm): 0.02-0.1 Morphology: ANHEDRAL,GRANULAR
MOST ALTERED TO IDDINGS,FEW REPLACED BY GREEN
CLAY;
PLAGIOCLASE ( 25%)
Size(mm): <0.01-0.1 Morphology: LATHS
CLINOPYROXENE ( 10%)
Size(mm): 0.05-0.1 Morphology: GRANULAR
MOST ALTERED TO CLAY(?);
OPAQUE MINERALS ( 15%)
Morphology: IRREGULAR GRAINS
INCLUDES MAGN+ILMENITE*
Alteration - CARBONATE ( 5%)
Location: VESICLES,
Location: FRACTURES
CLAY MINERALS ( 25%)
Location: INTERSTITIAL,
Location: VESICLES
REPLACING ALMOST EVERYTHING,GREEN,FIBROUS
ZEOLITE ( 10%)
Location: VESICLES
CLEAR NEEDLES*
Vesicles -
Size(mm): 0.5-1
Percent: 20
Filling: CALC,ZEOLITE,
Filling: CLAY
LINED WITH GREEN CLAY*
Leg : 55 Top/Bottom Interval(mm): 1300/1350 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 214.00 Rock Type: IGNEOUS
Core: 11 Sample Midpoint(m) : 215.33 Sect/Pc #: 1/
ROCK = OL SPARSELY PHYRIC BASALT
THOLEIITE, SOURCE IS IR, 38% ALTERED;
Texture: SPARSELY PHYRIC,OPHITIC*
Phenocrysts- OLIVINE ( <1%)
Size(mm): 0.72
Groundmass - PLAGIOCLASE ( 53%)
Size(mm): .01-.60
CLINOPYROXENE ( 31%)
Size(mm): .01-.50
OLIVINE ( 13%)
Size(mm): .01-.50
COMPLETELY REPLACED BY CALCITE+SMECTITE AND
IDDINGSITE;
ILMENITE ( 2%)
Size(mm): .01-.30
MAGNETITE ( <1%)
Size(mm): .005-.20
PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - CALCITE
Replacing: OL
SMECTITE
Replacing: OL
IDDINGSITE
Replacing: OL
Leg : 55 Top/Bottom Interval(mm): 1350/1370 Describer: Avdeiko, G.
Hole: 433C Top of Core Depth(m) : 214.00 Rock Type: IGNEOUS
Core: 11 Sample Midpoint(m) : 215.36 Sect/Pc #: 1/PCE 9C
ROCK = OL SPARSELY PHYRIC BASALT;
Texture: DIABASIC,PHYRIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 2%)
Size(mm): 1-2 Morphology: EUHEDRAL;SUBHEDRAL
ALTERED TO CLAYS+CARBS WITH IDDINGS RIMS*
Groundmass - OLIVINE (12-15%)
Size(mm): 0.1-0.5 Morphology: SUBHEDRAL
ALTERED TO IDDINGS AND SOMETIMES TO CLAYS IN
CENTRAL PARTS;
PLAGIOCLASE (45-50%)
Size(mm): 0.3-1.0 Morphology: LATHS
TO 1MM LONG, PARTLY ALTERED TO CLAYS;
CLINOPYROXENE (15-20%)
Size(mm): 0.1-1 Morphology: INTERSTITIAL
FRESH,SOMETIMES OPHITIC;
OPAQUE MINERALS (10-12%)
Morphology: IRREGULAR,INTERSTITIAL
INCLUDES MAGN+ILMENITE;
GLASS ( 5%)
Morphology: INTERSTITIAL
ALTERED TO CLAYS*
Alteration - CARBONATE ( <1%)
Location: PHENOS CENTER Replacing: OL
CLAY MINERALS
Location: PHENOS CENTER Replacing: GLASS,PLAG,OL
ZEOLITE ( <1%)
Location: VESICLES
Vesicles -
Size(mm): 1-3
Percent: 3-5
Location: LINING
Filling: ZEOLITES
Shape: ROUNDED
Leg : 55 Top/Bottom Interval(mm): 310/ 340 Describer: Dalrymple, G.
Hole: 433C Top of Core Depth(m) : 214.00 Rock Type: IGNEOUS
Core: 11 Sample Midpoint(m) : 217.33 Sect/Pc #: 3/PCE 2A
ROCK = OL MOD PHYRIC BASALT;
Texture: PORPHYRITIC,INTERGRANULAR-VARIOLITIC
GROUNDMASS IS INTERGRANULAR-VARIOLITIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 3%)
Size(mm): 0.3-1 Morphology: ANHEDRAL
COMPLETELY ALTERED TO IDDINGS RIMS AND CLAY*
Groundmass - OLIVINE ( 5%)
Size(mm): 0.05-0.3 Morphology: ANHEDRAL GRAINS
ALTERED TO IDDINGS;
PLAGIOCLASE ( 40%)
Size(mm): 0.02X0.1 Morphology: LATHS
STUBBY LATHS,MOSTLY FRESH;
CLINOPYROXENE ( 40%)
Size(mm): <0.01-0.1 Morphology: GRANULAR
COLORLESS,FRESH;
OPAQUE MINERALS ( 3-5%)
Size(mm): 0.01-0.1 Morphology: EQUANT GRAINS
INCLUDES MAGN+ILMENITE*
Alteration - CLAY MINERALS (10-15%)
Location: INTERSTITIAL Replacing: OL
GREENISH*
Vesicles -
Size(mm): 4X10
Percent: <<1
Filling: CALCITE
ONLY 1 VESICLES*
Leg : 55 Top/Bottom Interval(mm): 900/ 980 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 214.00 Rock Type: IGNEOUS
Core: 11 Sample Midpoint(m) : 217.94 Sect/Pc #: 3/
ROCK = OL SPARSELY PHYRIC BASALT
THOLEIITE, SOURCE IS IR, 36% ALTERED;
Texture: SPARSELY PHYRIC,SUB-OPHITIC*
Phenocrysts- OLIVINE ( 2%)
Size(mm): 0.72
Groundmass - PLAGIOCLASE ( 46%)
Size(mm): .02-.70
CLINOPYROXENE ( 33%)
Size(mm): .001-.30
OLIVINE ( 12%)
Size(mm): .01-.50
COMPLETELY REPLACED BY SMECTITE AND IDDINGSITE;
ILMENITE ( 4%)
Size(mm): .005-.25
MAGNETITE ( 2%)
Size(mm): .001-.05
PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - SMECTITE
Replacing: OL
IDDINGSITE
Replacing: OL
Leg : 55 Top/Bottom Interval(mm): 1060/1090 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 214.00 Rock Type: IGNEOUS
Core: 11 Sample Midpoint(m) : 219.58 Sect/Pc #: 4/PCE 14
ROCK = OL-PLAG PHYRIC BASALT;
Texture: PORPHYRITIC,INTERGRANULAR;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 10%)
Size(mm): 0.5-3 Morphology: EUHEDRAL
ENTIRELY ALTERED TO CLAY+IDDINGS+CALC, SOME IN
GLOMEROCRYSTS;
PLAGIOCLASE ( 1%)
Size(mm): 0.6- 1.4 Morphology: EUHEDRAL
SOME IN GLOMEROCRYSTS*
Groundmass - OLIVINE ( 5%)
Size(mm): 0.2-0.5 Morphology: EUHEDRAL
ALTERED TO CLAY+IDDINGS+CALCITE;
PLAGIOCLASE ( 30%)
Size(mm): 0.05-0.5 Morphology: SKELETAL,LATHS
CLINOPYROXENE ( 20%)
Size(mm): 0.04-0.3 Morphology: ANHEDRAL
2 SIZE RANGES 0.05 AND 0.2-0.3MM;
OPAQUE MINERALS ( 5%)
Size(mm): 0.04-0.15 Morphology: ANHEDRAL,SKELETAL
INCLUDES MAGN+ILMENITE*
Alteration - CARBONATE
Location: VESICLES Replacing: OL
CLAY MINERALS ( 19%)
Location: GROUNDMASS Replacing: GLASS,OL
15% OF CLAY IS AFTER OL*
Vesicles -
Size(mm): 0.3->5
Percent: 10
Location: THROUGHOUT
Filling: CALCITE,CLAY
Shape: ROUND
Leg : 55 Top/Bottom Interval(mm): 350/ 450 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 223.50 Rock Type: IGNEOUS
Core: 12 Sample Midpoint(m) : 223.90 Sect/Pc #: 1/
ROCK = OL-PLAG-CPX MOD PHYRIC BASALT
OL THOLEIITE, SOURCE IS IR, 40% ALTERED;
Texture: MOD PHYRIC,INTERGRANULAR*
Phenocrysts- OLIVINE ( 5%)
Size(mm): 1.49
PLAGIOCLASE ( 3%)
Size(mm): 0.65
CLINOPYROXENE ( 1%)
Size(mm): 0.61
Groundmass - PLAGIOCLASE ( 44%)
Size(mm): .005-1.00
SOME PLAG CORES ALTERED TO CLAYS AND K-FELDSPAR;
CLINOPYROXENE ( 35%)
Size(mm): .01-.50
OLIVINE ( 4%)
Size(mm): .01-.50
TOTALLY REPLACED BY CALCITE+SMECTITE AND IDDINGS;
ILMENITE ( 4%)
Size(mm): .01-.25
MAGNETITE ( 3%)
Size(mm): .005-.05
PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - SMECTITE
Replacing: OL,PLAG
IDDINGSITE
Replacing: OL
CALCITE
Replacing: OL
KFELDSPAR
Replacing: PLAG
Vesicles -
Size(mm): .51-8.50
Percent: 20
Filling: SMECTITE,
Shape: OVOID-
Filling: CALCITE
Shape: IRREGULAR
VESICLES LINED WITH GREEN FIBROUS SMECTITE AND
CALCITE*
Leg : 55 Top/Bottom Interval(mm): 500/ 530 Describer: Avdeiko, G.
Hole: 433C Top of Core Depth(m) : 223.50 Rock Type: IGNEOUS
Core: 12 Sample Midpoint(m) : 227.01 Sect/Pc #: 3/PCE 1E
ROCK = OL-PLAG MOD BASALT;
Texture: MICROLITIC,PORPHYRITIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 2-3%)
Size(mm): 0.5-2 Morphology: EUHEDRAL
COMPLETELY ALTERED TO CLAY.MINS+CARBONATES;
PLAGIOCLASE ( 40%)
Size(mm): 0.5-1 Morphology: TABULAR
THERE ARE KNOTS*
Groundmass - OLIVINE ( 2%)
Size(mm): <0.1 Morphology: GRAINS
ALTERED TO IDDINGS+CLAY.MINS;
PLAGIOCLASE ( 40%)
Size(mm): 0.3-1 Morphology: MICROLITES,LATHS
UP TO 1MM LONG,FRESH,SLIGHTLY ALTERED;
CLINOPYROXENE (15-20%)
Size(mm): 0.2-0.5 Morphology: ANHEDRAL-SUBHEDRAL
FRESH,SECTOR ZONED;
OPAQUE MINERALS (10-12%)
Morphology: IRREGULAR GRAINS,MICROLITES
INCLUDES MAGN+ILMENITE;
GLASS ( 25%)
ALTERED TO CLAYS WITH DEVITRIFICATION, SLIGHTLY
ALTERED TO ZEOLITES*
Alteration - CARBONATE (.2-.5%)
Replacing: OL
CLAY MINERALS (25-30%)
Replacing: GLASS,OL,PLAG
ZEOLITE ( 1-2%)
Replacing: GLASS
IDDINGSITE
Location: XTL RIMS, Replacing: OL
Location: GROUNDMASS
Leg : 55 Top/Bottom Interval(mm): 570/ 650 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 223.50 Rock Type: IGNEOUS
Core: 12 Sample Midpoint(m) : 227.11 Sect/Pc #: 3/
ROCK = OL-PLAG-CPX PHYRIC BASALT
THOLEIITE, SOURCE IS IR, 16% ALTERED;
Texture: PHYRIC,MICROLITIC-INTERGRANULAR*
Phenocrysts- OLIVINE ( 4%)
Size(mm): 0.88
PLAGIOCLASE ( 4%)
Size(mm): 1.05
CLINOPYROXENE ( 2%)
Size(mm): 0.73
Groundmass - CLINOPYROXENE ( 46%)
Size(mm): .003-.50
PLAGIOCLASE ( 33%)
Size(mm): .01-1.10
OLIVINE ( 5%)
Size(mm): .01-.50
TOTALLY REPLACED BY OLIVE-GREEN SMECTITE AND
IDDINGSITE;
TITANOMAGNETITE ( 3%)
Size(mm): .001-.05 Morphology: EQUANT
TINY,EXSOLVED;
ILMENITE ( 3%)
Size(mm): .01-.05
RARE ELONGATE XTLS MAY BE ILMENITE,
PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - SMECTITE
Replacing: OL
IDDINGSITE
Replacing: OL
Vesicles -
Size(mm): .10-3.24
Percent: 2
Shape: ROUND-
Shape: IRREGULAR
Leg : 55 Top/Bottom Interval(mm): 470/ 490 Describer: Dalrymple, G.
Hole: 433C Top of Core Depth(m) : 230.00 Rock Type: IGNEOUS
Core: 13 Sample Midpoint(m) : 231.98 Sect/Pc #: 2/PCE 1H
ROCK = APHYRIC BASALT
NO PHENOS WERE OBSERVED;
Texture: INTERGRANULAR,APHYRIC
COARSE-GRAINED;
Where sampled: FLOW INTERIOR*
Groundmass - OLIVINE ( 1-2%)
Size(mm): 0.5-1
COMPLETELY ALTERED TO IDDINGS+CLAY;
PLAGIOCLASE ( 60%)
Size(mm): <0.1-2 Morphology: LATHS
MANY STUBBY LATHS,FRESH;
CLINOPYROXENE ( 30%)
Size(mm): 0.05-0.5 Morphology: ANHEDRAL GRAINS
COLORLESS,FRESH;
OPAQUE MINERALS ( 3%)
Size(mm): 0.02-0.2
INCLUDES MAGN+ILMENITE;
MICA ( 2%)
Size(mm): 0.4 Morphology: ANHEDRAL
PLEOCHROIC BROWN-YELLOW,OCCURS AS AN ALTERATION
PRODUCT OF OL(??);
APATITE ( 1%)
Morphology: ACICULAR NEEDLES
Alteration - CLAY MINERALS ( 5-7%)
Location: INTERSTITIAL Replacing: OL,GLASS
GLASS(?),GREEN FIBROUS AND BROWN*
Vesicles -
Percent: 0
Leg : 55 Top/Bottom Interval(mm): 550/ 660 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 230.00 Rock Type: IGNEOUS
Core: 13 Sample Midpoint(m) : 232.11 Sect/Pc #: 2/
ROCK = PLAG-CPX-OL PHYRIC BASALT
PLAG THOLEIITE, SOURCE IS IR, 25% ALTERED;
Texture: PHYRIC,INTERGRANULAR*
Phenocrysts- PLAGIOCLASE ( 13%)
Size(mm): 1.28
CONTAIN GLASS INCLUSIONS;
CLINOPYROXENE ( 4%)
Size(mm): 0.91
OLIVINE ( 1%)
Size(mm): 0.77
Groundmass - PLAGIOCLASE ( 44%)
Size(mm): .05-1.20
CLINOPYROXENE ( 26%)
Size(mm): .05-.50
OLIVINE ( 7%)
Size(mm): .05-.50
TOTALLY REPLACED BY FIBROUS OLIVE SMECTITE;
ILMENITE ( 3%)
Size(mm): .01-.70 Morphology: ELONGATE
TITANOMAGNETITE ( 1%)
Size(mm): .005-.26 Morphology: EQUANT
EXSOLVED;
PYRITE
PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - SMECTITE
Replacing: OL
Leg : 55 Top/Bottom Interval(mm): 650/ 670 Describer: Avdeiko, G.
Hole: 433C Top of Core Depth(m) : 233.00 Rock Type: IGNEOUS
Core: 14 Sample Midpoint(m) : 235.16 Sect/Pc #: 2/PCE 2F
ROCK = PLAG-CPX MOD PHYRIC BASALT;
Texture: DIABASIC,PORPHYRITIC;
NON-OPHITIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( 1-2%)
Size(mm): 0.5-1.0 Morphology: SUBHEDRAL,TABULAR
ALTERED IN CENTRAL PARTS WITH FRESH RIMS;
CLINOPYROXENE ( 1-2%)
Size(mm): 0.5-0.8
FRESH, THERE ARE PLAG-CPX KNOTS*
Groundmass - OLIVINE ( 3-5%)
Size(mm): TO 0.5 Morphology: SUBHEDRAL
ALTERED TO IDDINGS;
PLAGIOCLASE (35-40%)
Size(mm): UP TO 1 Morphology: LATHS
UP TO 1MM LONG,PARTLY ALTERED TO GREEN CLAYS;
CLINOPYROXENE ( 5-7%)
Size(mm): 0.05-0.3 Morphology: INTERSTITIAL
FRESH;
OPAQUE MINERALS ( 15%)
Size(mm): 0.1-0.7 Morphology: IRREGULAR
INCLUDES MAGN+ILMENITE;
GLASS (15-20%)
Morphology: INTERSTITIAL
DARK BROWN,DEVITRIFIED,ALTERED TO CLAY.MINS*
Alteration - CLAY MINERALS ( 25%)
Location: VESICLES,VEIN Replacing: PLAG,GLASS
GREEN AND BROWN;
ZEOLITE ( 1-2%)
Location: VESICLES
IDDINGSITE ( 3-5%)
Replacing: OL
Vesicles -
Percent: 12
Filling: CLAY.MIN
Shape: ROUNDED,
Shape: IRREGULAR
1-2MM ROUNDED,UP TO 2X7,IRREGULAR*
Leg : 55 Top/Bottom Interval(mm): 80/ 150 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 233.00 Rock Type: IGNEOUS
Core: 14 Sample Midpoint(m) : 236.12 Sect/Pc #: 3/
ROCK = PLAG-CPX MOD PHYRIC BASALT
PLAG THOLEIITE, SOURCE IS IR, 21% ALTERED;
Texture: MOD PHYRIC,INTERGRANULAR*
Phenocrysts- PLAGIOCLASE ( 7%)
Size(mm): 1.09
CLINOPYROXENE ( 1%)
Size(mm): 0.74
Groundmass - PLAGIOCLASE ( 43%)
Size(mm): .01-.85
SOME PLAG CORES ARE REPLACED BY PHILLIPSITE(?) OR
K-FELDSPAR;
CLINOPYROXENE ( 36%)
Size(mm): .01-.50
OLIVINE ( 7%)
Size(mm): .01-.50
TOTALLY ALTERED TO SMECTITE AND IDDINGSITE;
ILMENITE ( 5%)
Size(mm): .01-.20 Morphology: ELONGATE
TITANOMAGNETITE ( 2%)
Size(mm): .001-.05 Morphology: SKELETAL
EXSOLVED,PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - KFELDSPAR
Replacing: PLAG
PHILLIPSITE
Replacing: PLAG
ID UNCERTAIN FOR PHILLIPSITE;
SMECTITE
Replacing: OL
IDDINGSITE
Replacing: OL
Vesicles -
Size(mm): .73-3.35
Percent: 15
Filling: SMECTITE
Shape: OVOID-
Shape: IRREGULAR
VESICLES LINED WITH FIBROUS OLIVE GREEN SMECTITE*
Leg : 55 Top/Bottom Interval(mm): 570/ 590 Describer: Avdeiko, G.
Hole: 433C Top of Core Depth(m) : 233.00 Rock Type: IGNEOUS
Core: 14 Sample Midpoint(m) : 236.58 Sect/Pc #: 3/PCE 4A
ROCK = PLAG-CPX MOD PHYRIC BASALT;
Texture: DIABASIC,PORPHYRITIC
NON-OPHITIC;
Where sampled: FLOW MARGIN*
Phenocrysts- PLAGIOCLASE ( 2-3%)
Size(mm): 0.5-1.2 Morphology: TABULAR
PARTLY ALTERED TO GREEN CLAYS;
CLINOPYROXENE ( 1-2%)
Size(mm): 0.5-1.0 Morphology: ANHEDRAL
FRESH,THERE ARE PLAG+CPX KNOTS*
Groundmass - OLIVINE ( 5%)
Size(mm): 0.05-0.4 Morphology: SUBHEDRAL
ALTERED TO IDDINGS;
PLAGIOCLASE ( 50%)
Size(mm): TO 1.0 Morphology: LATHS
UP TO 1MM LONG,PARTLY ALTERED TO GREEN CLAYS;
CLINOPYROXENE (10-12%)
Morphology: INTERSTITIAL
FRESH;
OPAQUE MINERALS (10-15%)
Morphology: IRREGULAR GRAINS,INTERSTITIAL
INCLUDES MAGN+ILMENITE;
GLASS (10-12%)
Morphology: INTERSTITIAL
ALTERED TO CLAYS,DEVITRIFIED*
Alteration - CLAY MINERALS ( 20%)
Location: VESICLES Replacing: PLAG,GLASS
IDDINGSITE ( 5%)
Replacing: OL
Vesicles -
Size(mm): 1-3
Percent: 5-7
Filling: CLAY.MINS
Shape: ROUND
GREEN+BROWN CLAYS*
Leg : 55 Top/Bottom Interval(mm): 180/ 240 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 233.00 Rock Type: IGNEOUS
Core: 14 Sample Midpoint(m) : 237.71 Sect/Pc #: 4/
ROCK = PLAG-CPX PHYRIC BASALT
PLAG THOLEIITE, SOURCE IS IR, 23% ALTERED;
Texture: PHYRIC,SUB-OPHITIC*
Phenocrysts- PLAGIOCLASE ( 9%)
Size(mm): 0.87
CLINOPYROXENE ( 2%)
Size(mm): 0.82
Groundmass - PLAGIOCLASE ( 48%)
Size(mm): .01-.72
SOME PLAG CORES REPLACED BY K-FELDSPAR;
CLINOPYROXENE ( 31%)
Size(mm): .01-.50
MAGNETITE ( 6%)
Size(mm): .001-.15
OLIVINE ( 2%)
Size(mm): .02-.20
ILMENITE ( 2%)
Size(mm): .01-.40
PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - KFELDSPAR
Location: CORES Replacing: PLAG
Leg : 55 Top/Bottom Interval(mm): 210/ 230 Describer: Avdeiko, G.
Hole: 433C Top of Core Depth(m) : 233.00 Rock Type: IGNEOUS
Core: 14 Sample Midpoint(m) : 237.72 Sect/Pc #: 4/PCE 1B
ROCK = PLAG-CPX MOD PHYRIC BASALT;
Texture: DIABASIC,MODERATELY PORPHYRITIC
NON-OPHITIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( 3-4%)
Size(mm): 0.5-1.5 Morphology: TABULAR
ZONED,FRESH,PARTLY ALTERED;
CLINOPYROXENE ( 3-4%)
Size(mm): 0.5-1.0
THERE ARE PLAG+CPX KNOTS*
Groundmass - OLIVINE ( 0%)
PLAGIOCLASE (45-50%)
Size(mm): 1 Morphology: LATHS
UP TO 1MM LONG,FRESH,PARTLY ALTERED;
CLINOPYROXENE (15-20%)
Size(mm): 0.05-0.4
FRESH;
OPAQUE MINERALS (20-25%)
Morphology: IRREGULAR,INTERSTITIAL
INCLUDES MAGN+ILMENITE;
GLASS ( 5%)
Morphology: INTERSTITIAL
ALTERED TO CLAYS*
Alteration - CLAY MINERALS ( 5-7%)
Replacing: GLASS,PLAG
Vesicles -
Percent: 0
Leg : 55 Top/Bottom Interval(mm): 1180/1220 Describer: Avdeiko, G.
Hole: 433C Top of Core Depth(m) : 242.50 Rock Type: IGNEOUS
Core: 15 Sample Midpoint(m) : 243.70 Sect/Pc #: 1/PCE 11
ROCK = CPX-PLAG-OL MOD PHYRIC BASALT;
Texture: DIABASIC,MODERATELY PORPHYRITIC
NON-OPHITIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 1%)
Size(mm): 0.5-1.2 Morphology: SUBHEDRAL
ALTERED TO IDDINGS+CLAY;
PLAGIOCLASE ( 1-2%)
Size(mm): 0.5-1.5 Morphology: TABULAR
PARTLY ALTERED TO CLAYS;
CLINOPYROXENE ( 2-3%)
Size(mm): 0.5-0.8 Morphology: ANHEDRAL
FRESH,THERE ARE CPX-PLAG KNOTS*
Groundmass - OLIVINE ( 5%)
Size(mm): 0.03-0.4 Morphology: SUBHEDRAL
ALTERED TO IDDINGS;
PLAGIOCLASE ( 40%)
Size(mm): TO 1 Morphology: LATHS
UP TO 1MM LONG;
CLINOPYROXENE ( 8-10%)
Morphology: IRREGULAR
FRESH;
OPAQUE MINERALS (20-25%)
Morphology: INTERSTITIAL
INCLUDES MAGN+ILMENITE;
GLASS ( 10%)
Morphology: INTERSTITIAL
ALTERED TO CLAYS*
Alteration - CLAY MINERALS ( 15%)
Location: VESICLES Replacing: OL,GLASS,PLAG
IDDINGSITE ( 5%)
Replacing: OL
Vesicles -
Size(mm): 1-3
Percent: 5-7
Filling: CLAY.MINS
Shape: ROUNDED
GREEN CLAYS LINE VESICLES*
Leg : 55 Top/Bottom Interval(mm): 580/ 640 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 242.50 Rock Type: IGNEOUS
Core: 15 Sample Midpoint(m) : 244.61 Sect/Pc #: 2/
ROCK = PLAG-CPX-OL MOD PHYRIC BASALT
PLAG THOLEIITE, SOURCE IS IR, 31% ALTERED;
Texture: MOD PHYRIC,INTERSERTAL*
Phenocrysts- PLAGIOCLASE ( 6%)
Size(mm): 0.98
CLINOPYROXENE ( 1%)
Size(mm): 0.70
OLIVINE ( <1%)
Size(mm): 0.59
Groundmass - PLAGIOCLASE ( 51%)
Size(mm): .01-.60
CLINOPYROXENE ( 26%)
Size(mm): .01-.25
OLIVINE ( 7%)
Size(mm): .005-.50
TOTALLY ALTERED TO IDDINGSITE AND SMECTITE;
MAGNETITE ( 5%)
Size(mm): .001-.07
ILMENITE ( 3%)
Size(mm): .01-.43
PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - IDDINGSITE
Replacing: OL
SMECTITE
Replacing: OL
Vesicles -
Size(mm): .12-4.11
Percent: 30
Filling: SMECTITE
Shape: ROUND-
Shape: IRREGULAR
VESICLES FILLED WITH FIBROUS OLIVE GREEN SMECTITE*
Leg : 55 Top/Bottom Interval(mm): 920/ 930 Describer: Avdeiko, G.
Hole: 433C Top of Core Depth(m) : 242.50 Rock Type: IGNEOUS
Core: 15 Sample Midpoint(m) : 246.43 Sect/Pc #: 3/PCE 10
ROCK = PLAG-CPX MOD PHYRIC BASALT;
Texture: MICROLITIC-SUBTRACHYTIC,MODERATELY PORPHYRITIC;
Where sampled: CONTACT WITH BRECCIA*
Phenocrysts- PLAGIOCLASE ( 2-3%)
Size(mm): 0.5-1.5 Morphology: TABULAR
ALTERED TO CLAY.MINS(70-80%) WITH FRESH RIMS;
CLINOPYROXENE ( 1%)
Size(mm): 0.3-0.6 Morphology: ANHEDRAL
FRESH*
Groundmass - OLIVINE ( 5-7%)
Size(mm): 0.03-0.4 Morphology: SUBHEDRAL
ALTERED TO CLAY.MINS(20%) AND IDDINGS(80%);
PLAGIOCLASE (30-35%)
Size(mm): TO 0.7 Morphology: LATHS
FRESH,PARTLY ALTERED(30-50%) TO CLAY.MINS;
CLINOPYROXENE ( 15%)
Size(mm): 0.04-0.2 Morphology: GRAINS
FRESH;
OPAQUE MINERALS ( >15%)
Morphology: IRREGULAR
GLASS ( 30%)
SPOTTED,ALTERED TO CLAYS WITH VERY DARK
DEVITRIFIED SPOTS(UPPER PART OF CONTACT) AND VERY
DARK DEVITRIFIED WITH GREEN CLAYS,
ABUNDANCES DO NOT INCLUDE VESICLES*
Alteration - CLAY MINERALS (60-70%)
Location: VESICLES Replacing: GLASS,PLAG,OL
IDDINGSITE ( 5%)
Replacing: OL
Vesicles -
Size(mm): 3
Percent: TO 15
Filling: CLAYS
Leg : 55 Top/Bottom Interval(mm): 430/ 460 Describer: Dalrymple, G.
Hole: 433C Top of Core Depth(m) : 242.50 Rock Type: IGNEOUS
Core: 15 Sample Midpoint(m) : 247.45 Sect/Pc #: 4/PCE 4
ROCK = CPX SPARSELY MICROPHYRIC BASALT
ROCK IS ALTERED, PROBABLY HAWAIITE;
Texture: SUBTRACHYTIC,MICROPHYRIC*
Phenocrysts- CLINOPYROXENE ( 1%)
Size(mm): 0.3-0.7 Morphology: EUHEDRAL
COLORLESS,TWINNED,MICROPHENOS*
Groundmass - OLIVINE ( 2%)
Size(mm): 0.2-0.3 Morphology: EUHEDRAL
ALTERED TO IDDINGS;
PLAGIOCLASE ( 50%)
Size(mm): 0.04-0.4 Morphology: LATHS
MOSTLY FRESH;
CLINOPYROXENE ( 25%)
Size(mm): <0.01-0.1 Morphology: GRANULAR
COLORLESS,MOSTLY FRESH,SOME ALTERATION TO CLAYS
IN CORES;
OPAQUE MINERALS ( 10%)
Size(mm): 0.01-0.1 Morphology: EQUANT
INCLUDES MAGN+ILMENITE*
Alteration - CLAY MINERALS ( 15%)
Location: VUGS, Replacing: MAFICS
Location: INTERSTITIAL
FIBROUS,GREEN*
Vesicles -
Size(mm): 1-3
Percent: 5
Filling: CLAY.MIN
Shape: IRREGULAR
VUGS,GREEN CLAY*
Leg : 55 Top/Bottom Interval(mm): 510/ 570 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 242.50 Rock Type: IGNEOUS
Core: 15 Sample Midpoint(m) : 247.54 Sect/Pc #: 4/
ROCK = PLAG-OL-CPX SPARSELY PHYRIC BASALT
THOLEIITE, SOURCE IS IR, 40% ALTERED;
Texture: SPARSELY PHYRIC,MICROLITIC,SUBTRACHYTIC*
Phenocrysts- PLAGIOCLASE ( 1%)
Size(mm): 0.54
OLIVINE ( <1%)
Size(mm): 0.45
CLINOPYROXENE ( <1%)
Size(mm): 0.57
Groundmass - PLAGIOCLASE ( 50%)
Size(mm): .01-.50
CLINOPYROXENE ( 37%)
Size(mm): .001-.50
MAGNETITE ( 8%)
Size(mm): .001-.05
ILMENITE ( 3%)
Size(mm): .005-.05
OLIVINE ( 1%)
Size(mm): .01-.50
TOTALLY ALTERED TO SMECTITE WITH IDDINGSITE RIMS,
PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - SMECTITE
Replacing: OL
IDDINGSITE
Location: RIMS Replacing: OL
Vesicles -
Size(mm): .05-5.63
Percent: 23
Filling: SMECTITE
Shape: IRREGULAR
MOST VESICLES ARE FILLED WITH FIBROUS OLIVE GREEN
SMECTITE*
Leg : 55 Top/Bottom Interval(mm): 160/ 310 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 242.50 Rock Type: IGNEOUS
Core: 15 Sample Midpoint(m) : 250.24 Sect/Pc #: 6/
ROCK = PLAG-CPX-OL MOD PHYRIC BASALT
THOLEIITE, SOURCE IS IR, 8% ALTERED;
Texture: MOD PHYRIC,SUBTRACHYTIC,MICROLITIC*
Phenocrysts- PLAGIOCLASE ( 1%)
Size(mm): 1.08
CLINOPYROXENE ( 1%)
Size(mm): 0.81
OLIVINE ( <1%)
Size(mm): 0.37
Groundmass - PLAGIOCLASE ( 41%)
Size(mm): .005-.65
CLINOPYROXENE ( 44%)
Size(mm): .001-.50
TITANOMAGNETITE ( 7%)
Size(mm): .001-.10 Morphology: EQUANT
WITH MINOR ILMENITE EXSOLUTION;
ILMENITE ( 4%)
Size(mm): .01-.10 Morphology: ELONGATE
OLIVINE ( <1%)
Size(mm): .02-.35
TOTALLY ALTERED TO OLIVE GREEN-BROWN SMECTITE AND
IDDINGSITE,PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - IDDINGSITE
Replacing: OL
SMECTITE
Replacing: OL
OLIVE GREEN-BROWN*
Leg : 55 Top/Bottom Interval(mm): 320/ 350 Describer: Dalrymple, G.
Hole: 433C Top of Core Depth(m) : 242.50 Rock Type: IGNEOUS
Core: 15 Sample Midpoint(m) : 250.34 Sect/Pc #: 6/PCE 1C
ROCK = PLAG-CPX MOD PHYRIC BASALT
HAWAIITE,ROCK IS EXTREMELY FRESH;
Texture: PORPHYRITIC,SUBTRACHYTIC-VARIOLITIC
GROUNDMASS IS SUBTRACHYTIC-VARIOLITIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( 3%)
Size(mm): 0.2-2
SOME AGGREGATES WITH CPX;
CLINOPYROXENE ( 1%)
Size(mm): 0.1-0.5
COLORLESS,TWINNED*
Groundmass - OLIVINE ( TR%)
ID UNCERTAIN FOR OL;
PLAGIOCLASE ( 45%)
Size(mm): 0.05X0.2 Morphology: LATHS
LATHS AND STUBBY LATHS,FRESH;
CLINOPYROXENE ( 40%)
Size(mm): 0.01-0.05 Morphology: GRANULAR
COLORLESS,FRESH;
OPAQUE MINERALS ( 10%)
Size(mm): 0.01-0.05 Morphology: EQUANT
INCLUDES MAGN+ILMENITE*
Alteration - CLAY MINERALS ( 2-3%)
Location: INTERSTITIAL Replacing: OL,CPX
GREENISH*
Vesicles -
Percent: 0
Leg : 55 Top/Bottom Interval(mm): 1060/1100 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 252.00 Rock Type: IGNEOUS
Core: 16 Sample Midpoint(m) : 253.08 Sect/Pc #: 1/
ROCK = PLAG-CPX MOD PHYRIC BASALT
THOLEIITE, SOURCE IS IR, 4% ALTERED;
Texture: MOD PHYRIC,MICROLITIC,INTERGRANULAR,
GLOMEROPHYRIC*
Phenocrysts- PLAGIOCLASE ( 3%)
Size(mm): 1.01
CLINOPYROXENE ( <1%)
Size(mm): 0.68
Groundmass - PLAGIOCLASE ( 52%)
Size(mm): .01-1.08
CLINOPYROXENE ( 34%)
Size(mm): .001-.28
OLIVINE ( 5%)
Size(mm): .05-.20
MOSTLY ALTERED TO DARK GREEN-BROWN SMECTITE;
MAGNETITE ( 3%)
Size(mm): .001-.10
ILMENITE ( 2%)
Size(mm): .01-.10
PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - SMECTITE
Replacing: OL
DARK GREEN-BROWN*
Leg : 55 Top/Bottom Interval(mm): 780/ 820 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 255.50 Rock Type: IGNEOUS
Core: 17 Sample Midpoint(m) : 256.30 Sect/Pc #: 1/
ROCK = PLAG-CPX MOD PHYRIC BASALT
THOLEIITE, SOURCE IS IR, 2% ALTERED;
Texture: MOD PHYRIC,INTERGRANULAR*
Phenocrysts- PLAGIOCLASE ( 2%)
Size(mm): 1.16
CLINOPYROXENE ( 1%)
Size(mm): 0.76
Groundmass - PLAGIOCLASE ( 50%)
Size(mm): .01-1.05
CLINOPYROXENE ( 40%)
Size(mm): .001-.35
ILMENITE ( 4%)
Size(mm): .008-.23
MAGNETITE ( 2%)
Size(mm): .005-.17
OLIVINE ( 1%)
Size(mm): .005-.48
TOTALLY ALTERED TO DARK GREEN-BROWN SMECTITE,
PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - SMECTITE
Replacing: OL
DARK GREEN-BROWN*
Leg : 55 Top/Bottom Interval(mm): 350/ 420 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 261.50 Rock Type: IGNEOUS
Core: 19 Sample Midpoint(m) : 261.89 Sect/Pc #: 1/
ROCK = PLAG-CPX MOD PHYRIC BASALT
THOLEIITE, SOURCE IS IR, 27% ALTERED;
Texture: MOD PHYRIC,SUB-OPHITIC,GLOMEROPHYRIC*
Phenocrysts- PLAGIOCLASE ( 3%)
Size(mm): 1.23
CLINOPYROXENE ( <1%)
Size(mm): 1.05
Groundmass - PLAGIOCLASE ( 50%)
Size(mm): .005-1.00
CLINOPYROXENE ( 36%)
Size(mm): .01-.45
MAGNETITE ( 8%)
Size(mm): .003-.06
OLIVINE ( 2%)
Size(mm): .01-.43
TOTALLY ALTERED TO DARK GREEN-BROWN SMECTITE AND
PLEOCHROIC IDDINGSITE;
ILMENITE ( 1%)
Size(mm): .005-.07
PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - IDDINGSITE
Replacing: OL
SMECTITE
Replacing: OL
Leg : 55 Top/Bottom Interval(mm): 460/ 530 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 261.50 Rock Type: IGNEOUS
Core: 19 Sample Midpoint(m) : 263.50 Sect/Pc #: 2/
ROCK = PLAG-CPX MOD PHYRIC BASALT
PLAG THOLEIITE, SOURCE IS IR, 35% ALTERED;
Texture: MOD PHYRIC,SUBOPHITIC,GLOMEROPHYRIC*
Phenocrysts- PLAGIOCLASE ( 6%)
Size(mm): 1.02
CLINOPYROXENE ( <1%)
Size(mm): 0.92
Groundmass - PLAGIOCLASE ( 42%)
Size(mm): .01-.85
CLINOPYROXENE ( 42%)
Size(mm): .005-.50
OLIVINE ( 5%)
Size(mm): .01-.50
COMPLETELY ALTERED TO OLIVE-GREEN SMECTITE AND
IDDINGSITE;
MAGNETITE ( 3%)
Size(mm): .005-.10
HAS HEMATITE RIMS;
ILMENITE ( 2%)
Size(mm): .01-.30
PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - SMECTITE
Replacing: OL
IDDINGSITE
Leg : 55 Top/Bottom Interval(mm): 530/ 560 Describer: Avdeiko, G.
Hole: 433C Top of Core Depth(m) : 261.50 Rock Type: IGNEOUS
Core: 19 Sample Midpoint(m) : 263.55 Sect/Pc #: 2/PCE 2F
ROCK = PLAG-CPX-OL MOD PHYRIC BASALT;
Texture: PORPHYRITIC,MICRODIABASIC
NON-OPHITIC,THERE ARE DARK SPOTS(10-15%) NEARLY
TOTAL ALTERATION OF GROUNDMASS,PERHAPS NEAR PORES;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( <1%)
Size(mm): 0.5-1.5 Morphology: SUBHEDRAL
ALTERED TO DARK CLAYS WITH IDDINGS RIMS;
PLAGIOCLASE ( 3-5%)
Size(mm): 0.5-2.0 Morphology: TABULAR
0.5-2.0MM LONG,PLAG PHENOCRYSTS WITH 3 STAGES OF
GROWTH;
CLINOPYROXENE ( 1-2%)
Size(mm): 0.5-1 Morphology: SUBHEDRAL
FRESH*
Groundmass - OLIVINE ( 10%)
Size(mm): 0.1-0.4 Morphology: SUBHEDRAL
ALTERED TO IDDINGSITES WITH CLAYS;
PLAGIOCLASE ( 45%)
Size(mm): 0.3-0.5 Morphology: LATHS
0.3-0.5MM LONG,FRESH;
CLINOPYROXENE (15-20%)
Size(mm): 0.05-0.4 Morphology: INTERSTITIAL
FRESH;
OPAQUE MINERALS (10-15%)
Morphology: IRREGULAR,INTERSTITIAL
INCLUDES MAGN+ILMENITE;
GLASS ( 5-7%)
Morphology: INTERSTITIAL
ALTERED TO CLAY.MINS*
Alteration - CLAY MINERALS ( 15%)
Location: PORES Replacing: GLASS,OL,PLAG
PORES(?),SOMETIMES REPLACING PLAG;
IDDINGSITE ( 2-3%)
Replacing: OL
Leg : 55 Top/Bottom Interval(mm): 190/ 220 Describer: Avdeiko, G.
Hole: 433C Top of Core Depth(m) : 261.50 Rock Type: IGNEOUS
Core: 19 Sample Midpoint(m) : 266.21 Sect/Pc #: 4/PCE 1B
ROCK = OL-PLAG-CPX PHYRIC BASALT;
Texture: DIABASIC,OPHITIC,PORPHYRITIC;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- OLIVINE ( 10%)
Size(mm): 0.5-1.5 Morphology: EUHEDRAL-SUBHEDRAL
ALTERED TO CLAY.MINS WITH IDDINGS RIMS;
PLAGIOCLASE ( 40%)
Size(mm): 0.5-1.5
USUALLY KNOTS,FRESH,PLAG MOSTLY ZONED,SOMETIMES
WITH 2 STAGES OF GROWTH;
CLINOPYROXENE (0.5-1%)
Size(mm): 0.5-0.7 Morphology: ANHEDRAL
FRESH*
Groundmass - OLIVINE ( 5%)
Size(mm): 0.1-0.4 Morphology: SUBHEDRAL
ALTERED TO CLAYS+IDDINGS;
PLAGIOCLASE ( 40%)
Size(mm): 0.4-1 Morphology: LATHS
0.4-1MM LONG,FRESH;
CLINOPYROXENE ( 20%)
Size(mm): 0.1-0.7 Morphology: OPHITIC,INTERSTITIAL
FRESH;
OPAQUE MINERALS ( 10%)
Morphology: IRREGULAR,INTERSTITIAL
INCLUDES MAGN+ILMENITE;
GLASS (12-15%)
Morphology: INTERSTITIAL
ALTERED TO CLAYS+ZEOLITES(?)*
Alteration - CLAY MINERALS ( 10%)
Replacing: GLASS,OL,CPX
ZEOLITE ( 15%)
Location: PORES Replacing: GLASS,OL
THERE ARE PHASES(OR SPOTS) OF NEARLY TOTAL
ALTERATION(GROUNDMASS TO ZEOLITES), PERHAPS NEAR
PORES;
IDDINGSITE ( 2%)
Replacing: OL
Leg : 55 Top/Bottom Interval(mm): 570/ 650 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 261.50 Rock Type: IGNEOUS
Core: 19 Sample Midpoint(m) : 268.11 Sect/Pc #: 5/
ROCK = PLAG-CPX-OL PHYRIC BASALT
PLAG THOLEIITE, SOURCE IS IR, 20% ALTERED;
Texture: PHYRIC,SUB-OPHITIC,GLOMEROPHYRIC*
Phenocrysts- PLAGIOCLASE ( 9%)
Size(mm): 1.42
CLINOPYROXENE ( 1%)
Size(mm): 1.20
OLIVINE ( <1%)
Size(mm): 1.24
Groundmass - PLAGIOCLASE ( 47%)
Size(mm): .02-1.37
CLINOPYROXENE ( 40%)
Size(mm): .005-.50
ILMENITE ( 2%)
Size(mm): .01-.42 Morphology: EQUANT SKELETAL
TITANOMAGNETITE ( 1%)
Size(mm): .005-.17 Morphology: EQUANT SKELETAL
PYRITE
OLIVINE ( <1%)
Size(mm): .01-.50
TOTALLY ALTERED TO OLIVE-GREEN SMECTITE AND
IDDINGSITE, PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - SMECTITE
Replacing: OL
IDDINGSITE
Replacing: OL
Leg : 55 Top/Bottom Interval(mm): 1290/1320 Describer: Avdeiko, G.
Hole: 433C Top of Core Depth(m) : 269.50 Rock Type: IGNEOUS
Core: 20 Sample Midpoint(m) : 272.31 Sect/Pc #: 2/PCE 13
ROCK = PLAG SPARSELY MICROPHYRIC BASALT;
Texture: MICRODIABASIC,NON-OPHITIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( 1%)
Size(mm): TO 1 Morphology: TABULAR
MICROPHENOS,FRESH,ZONED,KNOTS*
Groundmass - OLIVINE ( 10%)
Size(mm): 0.1-0.5 Morphology: SUBHEDRAL
MOSTLY 0.3MM,ALTERED TO CLAYS+IDDINGS;
PLAGIOCLASE ( 45%)
Size(mm): 0.3-0.8 Morphology: LATHS,MICROLITES
FRESH;
CLINOPYROXENE (12-15%)
Size(mm): <0.1 Morphology: ANHEDRAL
FRESH;
OPAQUE MINERALS ( 15%)
Morphology: MICROLITES,IRREGULAR
INCLUDES MAGN+ILMENITE;
GLASS ( 15%)
Morphology: INTERSTITIAL
ALTERED TO CLAYS+ZEOLITES*
Alteration - CLAY MINERALS (15-20%)
Replacing: GLASS,OL,PLAG
ZEOLITE ( 6-10%)
Location: PORES Replacing: GLASS,OL
UNSURE IF OL IS BEING REPLACED BY ZEOLITES;
IDDINGSITE ( 1%)
THERE ARE ZONES OF MORE COMPLETE ALTERATION NEAR
PORES*
Vesicles -
Size(mm): 0.5-3
Percent: 5
Filling: ZEOLITES
Shape: IRREGULAR
PORES*
Leg : 55 Top/Bottom Interval(mm): 150/ 230 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 279.00 Rock Type: IGNEOUS
Core: 21 Sample Midpoint(m) : 279.19 Sect/Pc #: 1/
ROCK = PLAG-OL SPARSELY PHYRIC BASALT
THOLEIITE, SOURCE IS IR, 26% ALTERED;
Texture: SPARSELY PHYRIC,MICROLITIC,INTERGRANULAR*
Phenocrysts- PLAGIOCLASE ( 1%)
Size(mm): 0.90
OLIVINE ( 1%)
Size(mm): 0.85
Groundmass - PLAGIOCLASE ( 48%)
Size(mm): .005-.98
CLINOPYROXENE ( 37%)
Size(mm): .001-.15
MAGNETITE ( 6%)
Size(mm): <.001-.09
OLIVINE ( 4%)
Size(mm): .003-.50
TOTALLY ALTERED TO OLIVE-GREEN SMECTITE AND
PLEOCHROIC IDDINGSITE;
ILMENITE ( 4%)
Size(mm): .008-.15
PERCENTAGES OBTAINED BY POINT COUNT*
Vesicles -
Size(mm): .05-5.05
Percent: 13
Filling: SMECTITE
Shape: ROUND-
Shape: IRREGULAR
VESICLES FILLED WITH OLIVE-GREEN FIBROUS SMECTITE*
Leg : 55 Top/Bottom Interval(mm): 70/ 130 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 279.00 Rock Type: IGNEOUS
Core: 21 Sample Midpoint(m) : 283.60 Sect/Pc #: 4/
ROCK = PLAG-OL SPARSELY PHYRIC BASALT
THOLEIITE, SOURCE IS IR, 25% ALTERED;
Texture: SPARSELY PHYRIC,MICROLITIC,INTERGRANULAR*
Phenocrysts- PLAGIOCLASE ( 1%)
Size(mm): 0.93
OLIVINE ( 1%)
Size(mm): 0.80
Groundmass - PLAGIOCLASE ( 45%)
Size(mm): .003-1.30
PLAG CORES REPLACED BY K-FELDSPAR;
CLINOPYROXENE ( 40%)
Size(mm): .001-.20
TITANOMAGNETITE ( 7%)
Size(mm): <.001-.10
FLAT GRAY IN REFLECTING LIGHT INDICATING LOW-TEMP.
OXIDATION;
ILMENITE ( 5%)
Size(mm): .008-.20 Morphology: ELONGATE
OLIVINE ( <1%)
Size(mm): .01-.50
TOTALLY ALTERED TO OLIVE-GREEN SMECTITE AND
IDDINGSITE;
PYRITE
PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - KFELDSPAR
Location: CORES Replacing: PLAG
SMECTITE
Replacing: OL
IDDINGSITE
Replacing: OL
Vesicles -
Size(mm): .09-7.18
Percent: 24
Filling: SMECTITE
Shape: ROUND-
Shape: IRREGULAR
VESICLES FILLED WITH FIBROUS OLIVE-GREEN SMECTITE*
Leg : 55 Top/Bottom Interval(mm): 400/ 420 Describer: Avdeiko, G.
Hole: 433C Top of Core Depth(m) : 279.00 Rock Type: IGNEOUS
Core: 21 Sample Midpoint(m) : 283.91 Sect/Pc #: 4/PCE 5
ROCK = PLAG-OL MOD PHYRIC BASALT;
Texture: MICROLITIC,MODERATELY PORPHYRITIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 1%)
Size(mm): 0.4-0.6 Morphology: SUBHEDRAL
ALTERED TO DARK CLAY WITH IDDINGS RIMS;
PLAGIOCLASE ( 2-3%)
Morphology: ANHEDRAL
FRESH,PARTLY(80%) ALTERED,ZONED WITH 3 STAGES OF
GROWTH;
CLINOPYROXENE ( <<1%)
Size(mm): 0.5X0.9 Morphology: SUBHEDRAL
FRESH,SINGLE PHENOS*
Groundmass - OLIVINE ( 5%)
Size(mm): 0.1-0.3 Morphology: SUBHEDRAL
ALTERED TO IDDINGS+CLAY;
PLAGIOCLASE ( 30%)
Size(mm): 0.2-0.5 Morphology: MICROLITES
0.2-0.3MM LONG,PARTLY ALTERED;
CLINOPYROXENE ( 10%)
Size(mm): 0.02-0.03 Morphology: GRAINS
FRESH;
OPAQUE MINERALS ( 15%)
INCLUDES MAGN+ILMENITE;
GLASS ( 30%)
DEVITRIFIED AND ALTERED TO CLAYS*
Alteration - CLAY MINERALS ( 50%)
Location: VESICLES, Replacing: GLASS,OL,PLAG
Location: PORES
IDDINGSITE ( 5%)
Replacing: OL
Vesicles -
Size(mm): 0.5-4
Percent: 5-7
Filling: CLAY.MIN
Shape: IRREGULAR
PORES,CLAY IS DARK,NEAR PORES+VESICLES THERE ARE
MORE ALTERED ZONES*
Leg : 55 Top/Bottom Interval(mm): 960/ 980 Describer: Avdeiko, G.
Hole: 433C Top of Core Depth(m) : 288.50 Rock Type: IGNEOUS
Core: 22 Sample Midpoint(m) : 289.47 Sect/Pc #: 1/PCE 10
ROCK = OL-PLAG MOD PHYRIC BASALT;
Texture: MICROLITIC,MODERATELY PORPHYRITIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 8-10%)
Size(mm): 0.5-2.0 Morphology: SUBHEDRAL
ALTERED TO IDDINGS+CLAY.MINS;
PLAGIOCLASE ( 2-3%)
Size(mm): 0.4-1.0 Morphology: SUBHEDRAL-TABULAR
FRESH,WITH MICROPHENOS KNOTS*
Groundmass - OLIVINE ( 8-10%)
Size(mm): 0.1-0.4 Morphology: SUBHEDRAL
ALTERED TO IDDINGS;
PLAGIOCLASE ( 40%)
Size(mm): 0.3-0.7 Morphology: MICROLITES,LATHS
FRESH;
CLINOPYROXENE ( 15%)
Size(mm): <0.1 Morphology: GRAINS
MOSTLY <0.1MM,FRESH;
OPAQUE MINERALS ( 10%)
Size(mm): 0.1-0.2 Morphology: IRREGULAR GRAINS
INCLUDES MAGN+ILMENITE;
GLASS ( 15%)
Morphology: INTERSTITIAL
ALTERED TO CLAYS*
Alteration - CLAY MINERALS ( 20%)
Location: VESICLES Replacing: GLASS
ZEOLITE ( 2%)
Location: VESICLES
IDDINGSITE ( 5-7%)
Replacing: OL
Vesicles -
Size(mm): 0.5-2.0
Percent: 5
Filling: CLAY.MINS
Shape: OVAL,LONG
Leg : 55 Top/Bottom Interval(mm): 1330/1360 Describer: Avdeiko, G.
Hole: 433C Top of Core Depth(m) : 288.50 Rock Type: IGNEOUS
Core: 22 Sample Midpoint(m) : 292.85 Sect/Pc #: 3/PCE 9
ROCK = OL-PLAG MOD PHYRIC BASALT;
Texture: MICROLITIC,PORPHYRITIC,VESICULAR;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 3%)
Size(mm): 0.5-1.2 Morphology: SUBHEDRAL
ALTERED TO CLAYS+IDDINGSITE;
PLAGIOCLASE
Size(mm): 0.5-1.5 Morphology: TABULAR
ZONED,SOMETIMES ALTERED,THERE ARE KNOTS OF PLAG
PHENOCRYSTS*
Groundmass - OLIVINE ( 10%)
Size(mm): 0.1-0.4 Morphology: SUBHEDRAL
ALTERED TO IDDINGS+CLAY.MINS;
PLAGIOCLASE ( 35%)
Size(mm): 0.2-0.6 Morphology: MICROLITES
ALTERED IN CENTRAL PARTS(40%);
CLINOPYROXENE ( 15%)
Size(mm): 0.04-0.2 Morphology: GRAINS
FRESH;
OPAQUE MINERALS ( 7-10%)
INCLUDES MAGN+ILMENITE;
GLASS ( 10%)
Morphology: INTERSTITIAL
ALTERED TO CLAY.MINS AND SOMETIMES IDDINGS*
Alteration - CLAY MINERALS (25-30%)
Location: VESICLES Replacing: GLASS,OL,PLAG
ZEOLITE ( 20%)
Location: VESICLES Replacing: GLASS
IDDINGSITE ( 5%)
Replacing: OL
Vesicles -
Size(mm): 0.1-0.5
Percent: 20
Filling: ZEOLITES
Shape: ROUNDED
Leg : 55 Top/Bottom Interval(mm): 450/ 520 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 288.50 Rock Type: IGNEOUS
Core: 22 Sample Midpoint(m) : 294.99 Sect/Pc #: 5/
ROCK = PLAG-OL MOD PHYRIC BASALT
PLAG THOLEIITE, SOURCE IS IR, 17% ALTERED;
Texture: MOD PHYRIC,MICROLITIC,INTERGRANULAR*
Phenocrysts- PLAGIOCLASE ( 7%)
Size(mm): 1.49
OLIVINE ( 2%)
Size(mm): 1.05
CONTAIN CHROMITE*
Groundmass - PLAGIOCLASE ( 41%)
Size(mm): .01-.95
CLINOPYROXENE ( 38%)
Size(mm): .001-.10
TITANOMAGNETITE ( 5%)
Size(mm): <.001-.10 Morphology: EQUANT
ILMENITE ( 5%)
Size(mm): .003-.14 Morphology: ELONGATE
OLIVINE ( 3%)
Size(mm): .01-.50
TOTALLY ALTERED TO OLIVE-GREEN SMECTITE WITH
IDDINGSITE RIMS;
PYRITE
PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - IDDINGSITE
Replacing: OL
SMECTITE
Replacing: OL
Vesicles -
Size(mm): .05-1.91
Percent: 6
Filling: SMECTITE
Shape: ROUND-
Shape: OVOID
VESICLES FILLED WITH FIBROUS OLIVE-GREEN SMECTITE*
Leg : 55 Top/Bottom Interval(mm): 40/ 60 Describer: Avdeiko, G.
Hole: 433C Top of Core Depth(m) : 298.00 Rock Type: IGNEOUS
Core: 23 Sample Midpoint(m) : 298.05 Sect/Pc #: 1/PCE 1A
ROCK = OL MOD PHYRIC BASALT;
Texture: MICROLITIC-VITROPHYRIC;
Where sampled: FLOW TOP*
Phenocrysts- OLIVINE ( 5%)
Size(mm): 0.5-3 Morphology: EUHEDRAL-SUBHEDRAL
COMPLETELY ALTERED TO CLAYS+ZEOLITES(?) WITH
IDDINGS RIMS;
CLINOPYROXENE ( <<1%)
Size(mm): 0.5-0.8 Morphology: ANHEDRAL
FRESH*
Groundmass - OLIVINE ( 5-7%)
Size(mm): 0.05-0.4 Morphology: SUBHEDRAL
ALTERED TO IDDINGS+CLAY.MINS;
PLAGIOCLASE (15-20%)
Size(mm): 0.05-0.2 Morphology: MICROLITES
50% ALTERED TO CLAY.MINS;
CLINOPYROXENE ( 5%)
Size(mm): <0.01
OPAQUE MINERALS ( 10%)
Size(mm): 0.1-0.2 Morphology: GRAINS
INCLUDES MAGN+ILMENITE;
GLASS (40-50%)
DEVITRIFIED AND ALTERED TO CLAY.MINS+IDDINGSITE*
Alteration - CLAY MINERALS ( 55%)
Location: VESICLES Replacing: GLASS,OL,PYX
ZEOLITE ( 10%)
Location: VESICLES Replacing: OL,GLASS
IDDINGSITE ( 3-5%)
Replacing: OL
Vesicles -
Percent: 10-15
Filling: CLAYS,ZEOLITES
Leg : 55 Top/Bottom Interval(mm): 1000/1030 Describer: Avdeiko, G.
Hole: 433C Top of Core Depth(m) : 298.00 Rock Type: IGNEOUS
Core: 23 Sample Midpoint(m) : 299.01 Sect/Pc #: 1/PCE 4D
ROCK = OL MOD PHYRIC BASALT;
Texture: MICROLITIC-VITROPHYRIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 5%)
Size(mm): 0.5-2.5 Morphology: SUBHEDRAL-EUHEDRAL
COMPLETELY ALTERED TO ZEOLITES(?)+CLAY+IDDINGS;
CLINOPYROXENE ( <<1%)
Size(mm): 0.5X0.8
FRESH,SINGLE GRAINS*
Groundmass - OLIVINE ( 10%)
Size(mm): 0.1-0.5 Morphology: SUBHEDRAL
ALTERED TO CLAYS+IDDINGS;
PLAGIOCLASE ( 20%)
Size(mm): 0.05X0.2 Morphology: MICROLITES
.05X0.2MM LONG,50% ALTERED TO CLAYS;
CLINOPYROXENE ( 5-7%)
Size(mm): 0.02-0.05 Morphology: GRAINS
PARTLY ALTERED;
OPAQUE MINERALS ( 8-10%)
INCLUDES MAGN+ILMENITE;
GLASS (40-45%)
Morphology: INTERSTITIAL
ALTERED TO CLAYS*
Alteration - CLAY MINERALS ( 60%)
Location: VESICLES, Replacing: OL,GLASS,PLAG,
Location: PORES Replacing: PYX
ZEOLITE ( 5-7%)
Location: VESICLES, Replacing: OL
Location: PORES
IDDINGSITE ( 5%)
Replacing: OL
Vesicles -
Percent: 12-15
Filling: CLAYS,ZEOLITES
Shape: ROUNDED,
Shape: IRREGULAR
ALSO PORES*
Leg : 55 Top/Bottom Interval(mm): 1000/1080 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 298.00 Rock Type: IGNEOUS
Core: 23 Sample Midpoint(m) : 299.04 Sect/Pc #: 1/
ROCK = OL-CPX MOD PHYRIC BASALT
THOLEIITE, SOURCE IS IR, 20% ALTERED;
Texture: MOD PHYRIC,MICROLITIC,INTERGRANULAR*
Phenocrysts- OLIVINE ( 2%)
Size(mm): 1.23
CLINOPYROXENE ( <1%)
Size(mm): 0.68
Groundmass - PLAGIOCLASE ( 45%)
Size(mm): .005-.45
CLINOPYROXENE ( 42%)
Size(mm): .001-.01
MAGNETITE ( 7%)
Size(mm): <.001-.02
OLIVINE ( 2%)
Size(mm): .01-.50
TOTALLY ALTERED TO OLIVE GREEN FIBROUS SMECTITE
AND IDDINGSITE,PERCENTAGES OBTAINED BY POINT
COUNT*
Alteration - SMECTITE
Replacing: OL
IDDINGSITE
Replacing: OL
Vesicles -
Size(mm): .05-4.00
Percent: 18
Filling: SMECTITE
Shape: IRREGULAR-
Shape: BRANCHING
ALMOST ALL FILLED WITH FIBROUS OLIVE-GREEN SMEC*
Leg : 55 Top/Bottom Interval(mm): 1110/1190 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 298.00 Rock Type: IGNEOUS
Core: 23 Sample Midpoint(m) : 302.15 Sect/Pc #: 3/
ROCK = OL-PLAG PHYRIC BASALT
THOLEIITIC PICRITE, SOURCE IS IR, 46% ALTERED;
Texture: PHYRIC,SUBOPHITIC*
Phenocrysts- OLIVINE ( 28%)
Size(mm): 1.46
PLAGIOCLASE ( 1%)
Size(mm): 0.49
Groundmass - CLINOPYROXENE ( 35%)
Size(mm): .01-.50
PLAGIOCLASE ( 32%)
Size(mm): .02-.75
ILMENITE ( 2%)
Size(mm): .01-.42
OLIVINE ( 1%)
Size(mm): .02-.50
ABOUT HALF REPLACED BY YELLOW TO BROWN SMECTITE
WITH IDDINGSITE RIMS,PERCENTAGES OBTAINED BY POINT
COUNT*
Alteration - SMECTITE
Replacing: OL
IDDINGSITE
Location: RIMS Replacing: OL
Leg : 55 Top/Bottom Interval(mm): 50/ 80 Describer: Avdeiko, G.
Hole: 433C Top of Core Depth(m) : 298.00 Rock Type: IGNEOUS
Core: 23 Sample Midpoint(m) : 304.07 Sect/Pc #: 5/PCE 1B
ROCK = OL PHYRIC BASALT;
Texture: MICRODIABASIC,SUBOPHITIC,PORPHYRITIC;
Where sampled: NEAR TOP*
Phenocrysts- OLIVINE ( 15%)
Size(mm): 1-3 Morphology: EUHEDRAL-SUBHEDRAL
ALTERED TO DARK CLAY.MINS WITH IDDINGS RIMS*
Groundmass - OLIVINE ( 5%)
Size(mm): 0.2-0.4 Morphology: SUBHEDRAL
ALTERED TO CLAY.MINS+IDDINGS;
PLAGIOCLASE (35-37%)
Size(mm): 0.3-0.7 Morphology: LATHS
FRESH,SLIGHTLY ALTERED TO CLAYS, 0.3-0.7MM LONG;
CLINOPYROXENE ( 25%)
Size(mm): 0.2-0.6 Morphology: INTERSTITIAL,SUBOPHITIC
FRESH;
OPAQUE MINERALS (10-12%)
Morphology: INTERSTITIAL
INCLUDES MAGN+ILMENITE;
GLASS ( 2-3%)
Morphology: INTERSTITIAL
DEVITRIFIED,DARK,ALTERED TO CLAYS*
Alteration - CLAY MINERALS (15-25%)
Location: VESICLES Replacing: GLASS,OL,PLAG
GREEN AND DARK;
IDDINGSITE
Replacing: OL
Vesicles -
Size(mm): .5-3TO 7
Percent: 5
Filling: CLAYS
Shape: OVAL,
Shape: IRREGULAR
PORES, DARK CLAYS WITH GREENISH BROWN CLAY WALLS*
Leg : 55 Top/Bottom Interval(mm): 250/ 280 Describer: Avdeiko, G.
Hole: 433C Top of Core Depth(m) : 307.50 Rock Type: IGNEOUS
Core: 24 Sample Midpoint(m) : 307.76 Sect/Pc #: 1/PCE 2
ROCK = OL-PLAG PHYRIC BASALT
PICRITE;
Texture: DIABASIC,NON-OPHITIC,PORPHYRITIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 30%)
Size(mm): 0.5-5 Morphology: SUBHEDRAL
MOSTLY 2MM,ALTERED TO CLAYS+IDDINGS;
PLAGIOCLASE ( <1%)
Size(mm): 0.8-1.2 Morphology: TABULAR
FRESH,PLAG WITH 2(MAYBE 3) STAGES OF GROWTH;
CLINOPYROXENE ( <<1%)
Size(mm): 0.4X0.8 Morphology: ANHEDRAL
FRESH*
Groundmass - OLIVINE ( 3-5%)
Size(mm): 0.1-0.4 Morphology: SUBHEDRAL
ALTERED TO IDDINGS;
PLAGIOCLASE (25-30%)
Size(mm): 0.3-1.0 Morphology: LATHS
0.3-1.0MM LONG,FRESH;
CLINOPYROXENE (20-25%)
Size(mm): 0.1-0.5 Morphology: INTERSTITIAL
FRESH;
OPAQUE MINERALS ( 7%)
Morphology: INTERSTITIAL
INCLUDES MAGN+ILMENITE;
GLASS ( 3%)
Morphology: INTERSTITIAL
ALTERED TO CLAY.MINS+ZEOLITES(?)*
Alteration - CARBONATE ( <1%)
Location: VESICLES
CLAY MINERALS (20-25%)
Location: VESICLES Replacing: GLASS,OL
ZEOLITE ( 5%)
Replacing: GLASS
IDDINGSITE ( 10%)
Replacing: OL
Vesicles -
Size(mm): 0.5-1.5
Percent: 5
Filling: CLAY.MINS,CARB
Shape: OVAL,
Shape: IRREGULAR
UP TO 3MM LONG*
Leg : 55 Top/Bottom Interval(mm): 1330/1390 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 307.50 Rock Type: IGNEOUS
Core: 24 Sample Midpoint(m) : 317.86 Sect/Pc #: 7/
ROCK = OL PHYRIC BASALT
THOLEIITIC PICRITE, SOURCE IS IR, 37% ALTERED;
Texture: PHYRIC,SUBOPHITIC*
Phenocrysts- OLIVINE ( 36%)
Size(mm): 1.93
OL PHENOS CONTAIN CHROMITE,ABOUT 20-25% OL
REPLACED BY YELLOW SMECTITE AND RIMMED BY IDDINGS*
Groundmass - OLIVINE
RARE OL ARE KINK-BANDED;
PYRITE
ZEOLITE
ID UNCERTAIN FOR ZEOLITES;
TITANOMAGNETITE
Morphology: EQUANT
PARTLY REPLACED BY HEMATITE;
ILMENITE ( 3%)
Size(mm): .01-.40 Morphology: ELONGATE
PLAGIOCLASE ( 36%)
Size(mm): .02-1.00
CLINOPYROXENE ( 25%)
Size(mm): .01-.50
PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - SMECTITE
Replacing: OL
IDDINGSITE
Location: RIMS Replacing: OL
HEMATITE
Replacing: TITAN.MT
ZEOLITE
Leg : 55 Top/Bottom Interval(mm): 1420/1430 Describer: Avdeiko, G.
Hole: 433C Top of Core Depth(m) : 307.50 Rock Type: IGNEOUS
Core: 24 Sample Midpoint(m) : 317.93 Sect/Pc #: 7/PCE 3G
ROCK = OL PHYRIC BASALT
PICRITE;
Texture: DIABASIC,PORPHYRITIC
NON-OPHITIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE (30-35%)
Size(mm): 0.5-5 Morphology: EUHEDRAL,SUBHEDRAL
VERY FRESH WITH IDDINGS RIMS*
Groundmass - OLIVINE ( 1%)
Size(mm): 0.1-0.4 Morphology: SUBHEDRAL
ALTERED TO IDDINGS;
PLAGIOCLASE (20-25%)
Size(mm): 0.4-1.0 Morphology: LATHS
FRESH, 0.4-1.0MM LONG;
CLINOPYROXENE (20-25%)
Morphology: INTERSTITIAL GRAINS
FRESH;
OPAQUE MINERALS ( 5%)
Morphology: INTERSTITIAL
INCLUDES MAGN+ILMENITE;
GLASS ( 2-3%)
Morphology: INTERSTITIAL
ALTERED TO GREEN CLAYS;
OTHER ( 10%)
RADIAL MINERAL, POSSIBLY ZEOLITES OR PHILLIPSITE*
Alteration - CLAY MINERALS ( 2-3%)
Replacing: GLASS
2 GREEN CLAYS;
ZEOLITE ( 10%)
Location: INTERSTITIAL
IDDINGSITE ( 2%)
Location: RIMS,GRAINS Replacing: OL
Leg : 55 Top/Bottom Interval(mm): 90/ 100 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 307.50 Rock Type: IGNEOUS
Core: 24 Sample Midpoint(m) : 318.10 Sect/Pc #: 8/
ROCK = OL PHYRIC BASALT
THOLEIITIC PICRITE, SOURCE IS IR, 38% ALTERED;
Texture: PHYRIC,INTERGRANULAR*
Phenocrysts- OLIVINE ( 23%)
Size(mm): 2.02
Groundmass - PLAGIOCLASE ( 39%)
Size(mm): .01-1.00
CLINOPYROXENE ( 25%)
Size(mm): .01-.40
OLIVINE ( 11%)
Size(mm): .15-.50
10% REPLACED BY BRIGHT BLUE-GREEN AND PALE YELLOW-
BUFF SMECTITE,RARE OL ARE KINK-BANDED;
ILMENITE ( 2%)
Size(mm): .005-.50
PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - SMECTITE
Replacing: OL
Leg : 55 Top/Bottom Interval(mm): 200/ 230 Describer: Avdeiko, G.
Hole: 433C Top of Core Depth(m) : 317.00 Rock Type: IGNEOUS
Core: 25 Sample Midpoint(m) : 318.72 Sect/Pc #: 2/PCE 1B
ROCK = OL SPARSELY PHYRIC BASALT;
Texture: MICROLITIC,SUBOPHITIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 1-2%)
Size(mm): 0.4-0.6 Morphology: SUBHEDRAL
ALTERED TO IDDINGS+CLAY.MINS*
Groundmass - OLIVINE (10-15%)
Size(mm): 0.1-0.4 Morphology: SUBHEDRAL
ALTERED TO IDDINGS+CLAY.MINS;
PLAGIOCLASE (30-35%)
Size(mm): 0.1-0.3 Morphology: MICROLITES
SLIGHTLY ALTERED TO CLAY.MINS;
CLINOPYROXENE ( 15%)
Size(mm): 0.05-0.2 Morphology: INTERSTITIAL
FRESH;
OPAQUE MINERALS ( 10%)
Morphology: INTERSTITIAL
INCLUDES MAGN+ILMENITE;
GLASS ( 30%)
Morphology: INTERSTITIAL
DEVITRIFIED,ALTERED TO CLAY.MINS*
Alteration - CLAY MINERALS ( 35%)
Replacing: GLASS,OL
THERE ARE DARK SPOTS MORE COMPLETE ALTERATION OF
GROUNDMASS;
IDDINGSITE ( 10%)
Replacing: OL
Leg : 55 Top/Bottom Interval(mm): 130/ 160 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 317.00 Rock Type: IGNEOUS
Core: 25 Sample Midpoint(m) : 321.64 Sect/Pc #: 4/
ROCK = OL-CPX SPARSELY PHYRIC BASALT
THOLEIITE, SOURCE IS IR, 18% ALTERED;
Texture: SPARSELY PHYRIC,MICROLITIC,INTERGRANULAR*
Phenocrysts- OLIVINE ( <1%)
Size(mm): 0.86
CLINOPYROXENE ( <1%)
Size(mm): 2.00
Groundmass - PLAGIOCLASE ( 50%)
Size(mm): .01-.66
PLAG CORES PARTLY REPLACED BY K-FELDSPAR;
CLINOPYROXENE ( 37%)
Size(mm): <.001-.15
MAGNETITE ( 7%)
Size(mm): <.001-.15
OLIVINE ( 5%)
Size(mm): .01-.50
ALMOST TOTALLY REPLACED BY BUFF SMECTITE AND
IDDINGSITE RIMS;
ILMENITE ( 1%)
Size(mm): .005-.19
PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - SMECTITE
Replacing: OL
IDDINGSITE
Location: RIMS Replacing: OL
Vesicles -
Size(mm): .07-.99
Percent: 8
Filling: SMECTITE
Shape: IRREGULAR
FILLED WITH YELLOW TO YELLOW-GREEN FIBROUS SMEC*
Leg : 55 Top/Bottom Interval(mm): 480/ 510 Describer: Avdeiko, G.
Hole: 433C Top of Core Depth(m) : 326.50 Rock Type: IGNEOUS
Core: 26 Sample Midpoint(m) : 327.00 Sect/Pc #: 1/PCE 2A
ROCK = OL SPARSELY PHYRIC BASALT;
Texture: MICRODIABASIC
NON-OPHITIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 2%)
Size(mm): 0.5-2 Morphology: SUBHEDRAL
ALTERED TO DARK CLAYS AND IDDINGS*
Groundmass - OLIVINE ( 5%)
Size(mm): 0.1-0.4 Morphology: SUBHEDRAL
ALTERED TO IDDINGS+CLAYS;
PLAGIOCLASE ( 35%)
Size(mm): 0.3-1.0 Morphology: MICROLITES,LATHS
FRESH;
CLINOPYROXENE ( 25%)
Size(mm): 0.05-0.2 Morphology: INTERSTITIAL GRAINS
FRESH;
OPAQUE MINERALS ( 10%)
Morphology: INTERSTITIAL,MICROLITES
INCLUDES MAGN+ILMENITE;
GLASS (20-25%)
Morphology: INTERSTITIAL
ALTERED TO DARK CLAY.MINS,DEVITRIFIED*
Alteration - CLAY MINERALS ( 25%)
Replacing: GLASS,OL
THERE ARE DARK SPOTS(CLAYS) OF NEARLY TOTAL
ALTERATION OF GROUNDMASS;
IDDINGSITE ( 4%)
Replacing: OL
Leg : 55 Top/Bottom Interval(mm): 790/ 870 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 326.50 Rock Type: IGNEOUS
Core: 26 Sample Midpoint(m) : 330.33 Sect/Pc #: 3/
ROCK = OL SPARSELY PHYRIC BASALT
THOLEIITE, SOURCE IS IR, 12% ALTERED;
Texture: SPARSELY PHYRIC,INTERGRANULAR*
Phenocrysts- OLIVINE ( <1%)
Size(mm): 0.63
Groundmass - PLAGIOCLASE ( 45%)
Size(mm): .001-1.05
CLINOPYROXENE ( 42%)
Size(mm): .001-.30
MAGNETITE ( 6%)
Size(mm): .001-.05
OLIVINE ( 5%)
Size(mm): .01-.50
TOTALLY REPLACED BY OLIVE-GREEN FIBROUS SMECTITE
AND RIMMED BY IDDINGSITE;
ILMENITE ( 1%)
Size(mm): .005-.10
PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - SMECTITE
Replacing: OL
IDDINGSITE
Location: RIMS Replacing: OL
Vesicles -
Size(mm): .10-1.03
Percent: 3
Filling: SMECTITE
Shape: OVOID
VESICLES FILLED WITH OLIVE-GREEN FIBROUS SMECTITE*
Leg : 55 Top/Bottom Interval(mm): 850/ 880 Describer: Avdeiko, G.
Hole: 433C Top of Core Depth(m) : 326.50 Rock Type: IGNEOUS
Core: 26 Sample Midpoint(m) : 333.37 Sect/Pc #: 5/PCE 1H
ROCK = OL PHYRIC BASALT;
Texture: MICRODIABASIC,OPHITIC,PORPHYRITIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 10%)
Size(mm): 0.5-2.5 Morphology: EUHEDRAL-SUBHEDRAL
SOME FRESH,ALTERED TO IDDINGS+CLAY.MINS*
Groundmass - OLIVINE ( 3-5%)
Size(mm): 0.1-0.4 Morphology: SUBHEDRAL
ALTERED TO IDDINGS+CLAY.MINS;
PLAGIOCLASE ( 35%)
Size(mm): 0.3-1.0 Morphology: LATHS
FRESH,0.3-1.0MM LONG;
CLINOPYROXENE ( 30%)
Morphology: INTERSTITIAL-SUBOPHITIC
FRESH;
OPAQUE MINERALS ( 5-7%)
Morphology: INTERSTITIAL
INCLUDES MAGN+ILMENITE;
GLASS ( 15%)
Morphology: INTERSTITIAL
ALTERED TO CLAY.MINS+ZEOLITES(?)*
Alteration - CLAY MINERALS ( 20%)
Replacing: GLASS,OL
ZEOLITE ( 5%)
Location: GLASS
ID UNCERTAIN FOR ZEOLITES;
IDDINGSITE ( 5%)
Replacing: OL
Leg : 55 Top/Bottom Interval(mm): 1090/1110 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 326.50 Rock Type: IGNEOUS
Core: 26 Sample Midpoint(m) : 335.10 Sect/Pc #: 6/PCE 7A
ROCK = OL MOD PHYRIC BASALT;
Texture: SUBTRACHYTIC,OPHITIC,SPARSELY PORPHYRITIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 5%)
Size(mm): 0.1-0.9 Morphology: EUHEDRAL
TOTALLY ALTERED TO IDDINGS+CLAY.MIN*
Groundmass - OLIVINE ( 15%)
Morphology: SUBHEDRAL-EUHEDRAL
TOTALLY ALTERED TO IDDINGS+CLAY.MINS;
PLAGIOCLASE ( 35%)
CLINOPYROXENE ( 20%)
Size(mm): 0.1-1 Morphology: ANHEDRAL
OPHITICLY SURROUNDS PLAG;
OPAQUE MINERALS ( 5%)
Size(mm): 0.05-0.15 Morphology: ANHEDRAL
INCLUDES MAGN+ILMENITE*
Alteration - CLAY MINERALS ( 20%)
Location: GROUNDMASS Replacing: GLASS,OL
GLASS(?),30% PLUS AFTER OL*
Leg : 55 Top/Bottom Interval(mm): 350/ 380 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 336.00 Rock Type: IGNEOUS
Core: 27 Sample Midpoint(m) : 337.87 Sect/Pc #: 2/PCE 6C
ROCK = OL PHYRIC BASALT
PICRITE;
Texture: PORPHYRITIC,VARIOLITIC,GRANULAR;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 30%)
Size(mm): 0.2-5 Morphology: EUHEDRAL
APPROX COMP FO70, PHENOS AND MICROPHENOS PARTIALLY
ALTERED TO IDDINGS*
Groundmass - OLIVINE ( 10%)
Size(mm): 0.1-0.2 Morphology: EUHEDRAL
SERICITE WITH THE PHENOS;
PLAGIOCLASE ( 25%)
Size(mm): 0.1-1.0 Morphology: SKELETAL
IN VARIOLES;
CLINOPYROXENE ( 15%)
Size(mm): 0.1-0.3 Morphology: ANHEDRAL,SKELETAL
OPAQUE MINERALS ( 10%)
Size(mm): 0.03-0.1 Morphology: SKELETAL
INCLUDES MAGN+ILMENITE*
Alteration - CLAY MINERALS ( 10%)
Location: GROUNDMASS Replacing: PLAG,OL
30-40% AFTER PLAG+OL*
Leg : 55 Top/Bottom Interval(mm): 1250/1340 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 336.00 Rock Type: IGNEOUS
Core: 27 Sample Midpoint(m) : 338.80 Sect/Pc #: 2/
ROCK = OL PHYRIC BASALT
THOLEIITIC PICRITE, SOURCE IS IR, 59% ALTERED;
Texture: PHYRIC,SUBOPHITIC*
Phenocrysts- OLIVINE ( 30%)
Size(mm): 1.97
Groundmass - PLAGIOCLASE ( 28%)
Size(mm): .005-1.20
CLINOPYROXENE ( 26%)
Size(mm): .01-.50
OLIVINE ( 12%)
Size(mm): .01-.50
PARTLY ALTERED TO FIBROUS BUFF SMECTITE AND
IDDINGSITE;
MAGNETITE ( 3%)
Size(mm): <.001-.05
PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - CALCITE
Location: VEIN
SMECTITE
Replacing: OL
IDDINGSITE
Replacing: OL
Leg : 55 Top/Bottom Interval(mm): 210/ 240 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 345.50 Rock Type: IGNEOUS
Core: 28 Sample Midpoint(m) : 347.23 Sect/Pc #: 2/PCE 1D
ROCK = PLAG-CPX-OL PHYRIC BASALT;
Texture: PORPHYRITIC,INTERSTITIAL;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 2%)
Morphology: EUHEDRAL
SOME GLOMEROCRYSTS WITH OL+PLAG+CPX;
PLAGIOCLASE ( 18%)
Size(mm): 0.2-4 Morphology: EUHEDRAL
CLINOPYROXENE ( 5%)
Size(mm): 0.15-2.0 Morphology: EUHEDRAL
INCLUDES MICROPHENOS*
Groundmass - PLAGIOCLASE ( 25%)
Size(mm): 0.02-0.2 Morphology: ANHEDRAL LATHS
CLINOPYROXENE ( 20%)
Size(mm): 0.04-0.1 Morphology: ANHEDRAL
OPAQUE MINERALS ( 5%)
Size(mm): 0.01-0.1 Morphology: SUBHEDRAL
INCLUDES MAGN+ILMENITE*
Alteration - CLAY MINERALS ( 23%)
Location: GROUNDMASS Replacing: GLASS,OL
Vesicles -
Size(mm): 0.4-0.8
Percent: 2
Location: XTLS
Filling: CLAY.MIN
Shape: ROUND
SOME IN OLD OL XTLS*
Leg : 55 Top/Bottom Interval(mm): 730/ 800 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 345.50 Rock Type: IGNEOUS
Core: 28 Sample Midpoint(m) : 347.77 Sect/Pc #: 2/
ROCK = PLAG-CPX MOD PHYRIC BASALT
PLAG THOLEIITE, SOURCE IS IR, 3% ALTERED;
Texture: MOD PHYRIC,INTERGRANULAR*
Phenocrysts- PLAGIOCLASE ( 5%)
Size(mm): 1.11
CLINOPYROXENE ( 1%)
Size(mm): 0.80
Groundmass - PLAGIOCLASE ( 47%)
Size(mm): .005-1.00
CLINOPYROXENE ( 45%)
Size(mm): .005-.30
ILMENITE ( 2%)
Size(mm): .01-.20
MAGNETITE ( <1%)
Size(mm): .003-.20
PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - PHILLIPSITE ( RARE%)
ID UMCERTAIN FOR PHILIPPSITE*
Vesicles -
Size(mm): .09-1.58
Percent: 2
Filling: SMECTITE
Shape: OVOID
Shape: IRREGULAR
VESICLES ARE FILLED WITH BROWN SMECTITE WITH GREEN
SMECTITE AT THE CENTER*
Leg : 55 Top/Bottom Interval(mm): 1080/1100 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 345.50 Rock Type: IGNEOUS
Core: 28 Sample Midpoint(m) : 352.59 Sect/Pc #: 5/PCE 6E
ROCK = OL-PLAG-CPX PHYRIC BASALT;
Texture: PORPHYRITIC,SUBTRACHYTIC,INTERSTITIAL;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 5%)
Size(mm): 0.15-1.2 Morphology: EUHEDRAL
TOTALLY ALTERED TO CLAY.MIN+IDDINGS;
PLAGIOCLASE ( 30%)
Size(mm): 0.5-2 Morphology: EUHEDRAL
SOME GLOMEROCRYSTS TO 3MM;
CLINOPYROXENE ( 5%)
Size(mm): 0.3-1.0 Morphology: EUHEDRAL
AUGITE,SOME IN GLOMEROCRYSTS,INCLUDES MICROPHENOS*
Groundmass - OLIVINE
SEE CLAY.MIN ALTERATION;
PLAGIOCLASE ( 30%)
Size(mm): 0.1-0.5 Morphology: ANHEDRAL,SKELETAL
MOSTLY ANHEDRAL;
CLINOPYROXENE ( 20%)
Size(mm): 0.03-0.1 Morphology: ANHEDRAL,GRANULAR
OPAQUE MINERALS ( 5%)
Size(mm): 0.04-0.15 Morphology: SUBHEDRAL
INCLUDES MAGN+ILMENITE*
Alteration - CLAY MINERALS ( 20%)
Location: GROUNDMASS Replacing: GLASS,OL
POSSIBLY 15% AFTER OL*
Leg : 55 Top/Bottom Interval(mm): 1120/1130 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 355.00 Rock Type: IGNEOUS
Core: 29 Sample Midpoint(m) : 356.13 Sect/Pc #: 1/
ROCK = PLAG-CPX-OL MOD PHYRIC BASALT
PLAG THOLEIITE, SOURCE IS IR, 13% ALTERED;
Texture: MOD PHYRIC,INTERGRANULAR*
Phenocrysts- PLAGIOCLASE ( 5%)
Size(mm): 1.28
CLINOPYROXENE ( 1%)
Size(mm): 0.71
OLIVINE ( <1%)
Size(mm): 1.00
Groundmass - PLAGIOCLASE ( 45%)
Size(mm): .005-.80
CORES PARTLY REPLACED BY K-FELDSPAR;
CLINOPYROXENE ( 40%)
Size(mm): .001-.50
ILMENITE ( 5%)
Size(mm): .01-.37 Morphology: ELONGATE
PYRITE
MAGNETITE ( 2%)
Size(mm): .005-.10
OLIVINE ( 2%)
Size(mm): .01-.50
PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - KFELDSPAR
Location: CORES Replacing: PLAG
Vesicles -
Size(mm): .25-2.80
Percent: 4
Filling: SMECTITE
Shape: ROUND-OVOID
HAVE THIN LINING OF OLIVE-GREEN FIBROUS SMECTITE*
Leg : 55 Top/Bottom Interval(mm): 940/1000 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 355.00 Rock Type: IGNEOUS
Core: 29 Sample Midpoint(m) : 357.47 Sect/Pc #: 2/
ROCK = PLAG-CPX-OL MOD PHYRIC BASALT
PLAG THOLEIITE, SOURCE IS IR, 14% ALTERED;
Texture: MOD PHYRIC,INTERGRANULAR*
Phenocrysts- PLAGIOCLASE ( 7%)
Size(mm): 1.40
CLINOPYROXENE ( 1%)
Size(mm): 0.95
OLIVINE ( 1%)
Size(mm): 1.08
ENCLOSE CHROMITE*
Groundmass - PLAGIOCLASE ( 46%)
Size(mm): .005-1.66
CLINOPYROXENE ( 39%)
Size(mm): <.001-0.50
PYRITE
ALKALI FELDSPAR ( RARE%)
TITANOMAGNETITE ( 3%)
Size(mm): <.001-.05
TINY,EXSOLVED;
ILMENITE ( 2%)
Size(mm): .01-.05
OLIVINE ( 1%)
Size(mm): .01-.50
TOTALLY ALTERED TO FIBROUS OLIVE-GREEN SMECTITE
WITH IDDINGSITE RIMS, POINT COUNTS*
Alteration - CELADONITE
Location: VESICLES
ZEOLITE
SMECTITE
Replacing: OL
IDDINGSITE
Location: RIMS Replacing: OL
Vesicles -
Size(mm): .05-2.35
Percent: 3
Filling: CELADONITE
Shape: IRREGULAR-
Shape: ROUND
FILLED WITH YELLOW GREEN CELADONITE*
Leg : 55 Top/Bottom Interval(mm): 250/ 270 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 355.00 Rock Type: IGNEOUS
Core: 29 Sample Midpoint(m) : 358.26 Sect/Pc #: 3/PCE 2C
ROCK = PLAG-CPX-OL PHYRIC BASALT;
Texture: VARIOLITIC,INTERSTITIAL,PORPHYRITIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 1-2%)
Size(mm): 0.3-2.8 Morphology: EUHEDRAL
ALTERED TO CLAY WITH IDDINGS RIMS;
PLAGIOCLASE ( 7%)
Size(mm): 0.3-1.6 Morphology: EUHEDRAL
SOME GLOMEROCRYSTS;
CLINOPYROXENE ( 5%)
Size(mm): 0.3-2.0 Morphology: EUHEDRAL
SOME GLOMEROCRYSTS*
Groundmass - PLAGIOCLASE ( 30%)
Size(mm): 0.05-0.3 Morphology: ANHEDRAL LATHS,SKELETAL
MOSTLY ANHEDRAL LATHS;
CLINOPYROXENE ( 20%)
Size(mm): 0.2-0.5 Morphology: ANHEDRAL
OPAQUE MINERALS ( 5%)
Size(mm): 0.2-0.4 Morphology: SUBHEDRAL
INCLUDES MAGN+ILMENITE*
Alteration - CLAY MINERALS ( 20%)
Location: GROUNDMASS Replacing: GLASS
GLASS(?);
Vesicles -
Size(mm): 0.4-2
Percent: 10
Location: THROUGHOUT
Filling: CLAY.MIN
Shape: ROUND-
Shape: FLATTENED
Leg : 55 Top/Bottom Interval(mm): 140/ 170 Describer: Dalrymple, G.
Hole: 433C Top of Core Depth(m) : 374.00 Rock Type: IGNEOUS
Core: 31 Sample Midpoint(m) : 374.16 Sect/Pc #: 1/PCE 1D
ROCK = OL-PLAG MOD PHYRIC BASALT
FLOW UNIT 27,ONE OF THE FRESHEST FLOWS IN HOLE;
Piece #: HYRITIC,INTERGRANULAR;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 5%)
Size(mm): 0.5-1 Morphology: ANHEDRAL
FRESH,CLAY RIMS;
PLAGIOCLASE ( 2%)
Size(mm): 0.5-1.5 Morphology: LATHS
STUBBY LATHS,MANY IN CLOTS,FRESH*
Groundmass - OLIVINE ( 2%)
Size(mm): 0.1-0.5 Morphology: GRANULAR
PLAGIOCLASE ( 40%)
Size(mm): 0.05-0.5 Morphology: LATHS
STUBBY LATHS;
CLINOPYROXENE ( 36%)
Size(mm): 0.01-0.1 Morphology: GRANULAR
COLORLESS;
OPAQUE MINERALS ( 10%)
Size(mm): 0.01-0.1 Morphology: EQUANT GRAINS
INCLUDES MAGN+ILMENITE,SOME STUBBY BLADES;
APATITE ( <<1%)
Morphology: NEEDLES
STUBBY NEEDLES*
Alteration - CLAY MINERALS ( 3-5%)
Location: INTERSTITIAL, Replacing: OL,PLAG
Location: GROUNDMASS
BRIGHT GREEN AND BROWN*
Vesicles -
Percent: 0
Leg : 55 Top/Bottom Interval(mm): 280/ 340 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 374.00 Rock Type: IGNEOUS
Core: 31 Sample Midpoint(m) : 374.31 Sect/Pc #: 1/
ROCK = PLAG-OL PHYRIC BASALT
PLAG-OL THOLEIITE, SOURCE IS IR, 5% ALTERED;
Texture: PHYRIC,INTERGRANULAR*
Phenocrysts- PLAGIOCLASE ( 7%)
Size(mm): 0.96
OLIVINE ( 6%)
Size(mm): 0.98
Groundmass - PLAGIOCLASE ( 40%)
Size(mm): .005-1.05
SOME OL POIKILITICALLY ENCLOSES PLAG;
CLINOPYROXENE ( 37%)
Size(mm): <.001-.23
TITANOMAGNETITE ( 5%)
Size(mm): .005-.19 Morphology: EQUANT
ILMENITE ( 3%)
Size(mm): .01-.20 Morphology: ELONGATE
CHROMITE ( RARE%)
PYRITE ( RARE%)
OLIVINE ( 2%)
Size(mm): .01-.50
10-15% REPLACED BY BUFF SMECTITE,PERCENTAGES
OBTAINED BY POINT COUNT*
Alteration - SMECTITE
Replacing: OL
Leg : 55 Top/Bottom Interval(mm): 1190/1270 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 374.00 Rock Type: IGNEOUS
Core: 31 Sample Midpoint(m) : 379.73 Sect/Pc #: 4/
ROCK = OL PHYRIC BASALT
THOLEIITIC PICRITE, SOURCE IS IR, 78% ALTERED;
Texture: PHYRIC,SUBOPHITIC*
Phenocrysts- OLIVINE ( 19%)
Size(mm): 1.16
Groundmass - PLAGIOCLASE ( 41%)
Size(mm): .005-1.55
ABOUT 80% REPLACED BY PALE OLIVE-GREEN SMECTITE;
CLINOPYROXENE ( 22%)
Size(mm): .001-.30
OLIVINE ( 10%)
Size(mm): .01-.50
TOTALLY REPLACED BY FIBROUS YELLOW SMECTITE AND
IDDINGSITE;
MAGNETITE ( 6%)
Size(mm): .005-.10
ILMENITE ( 2%)
Size(mm): .01-.19
PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - SMECTITE
Replacing: OL,PLAG
IDDINGSITE
Replacing: OL
Vesicles -
Size(mm): .15-5.13
Percent: 17
Filling: CALCITE,FIBROUS
Shape: ROUND-
Filling: SMECTITE
Shape: IRREGULAR
Leg : 55 Top/Bottom Interval(mm): 950/ 980 Describer: Dalrymple, G.
Hole: 433C Top of Core Depth(m) : 383.50 Rock Type: IGNEOUS
Core: 32 Sample Midpoint(m) : 384.47 Sect/Pc #: 1/PCE 3D
ROCK = OL PHYRIC BASALT
PICRITE;
Texture: PORPHYRITIC, INTERGRANULAR-SUBOPHITIC
GROUNDMASS IS INTERGRANULAR-SUBOPHITIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 25%)
Size(mm): 1-7 Morphology: SUBHEDRAL
30% ALTERED TO CLAY.MIN*
Groundmass - OLIVINE ( 5%)
Size(mm): .02-1 Morphology: GRANULAR
MOSTLY ALTERED TO IDDINGS;
PLAGIOCLASE ( 25%)
Size(mm): 0.1-0.4 Morphology: LATHS
FRESH;
CLINOPYROXENE ( 35%)
GLASS ( 3%)
Morphology: INTERSTITIAL
CLOUDED WITH OPAQUE OXIDES*
Alteration - CLAY MINERALS (10-15%)
Location: GROUNDMASS Replacing: OL
BROWN CLAY AFTER OL,GREEN IN GROUNDMASS
REPLACING ??*
Vesicles -
Percent: 0
Leg : 55 Top/Bottom Interval(mm): 780/ 810 Describer: Dalrymple, G.
Hole: 433C Top of Core Depth(m) : 383.50 Rock Type: IGNEOUS
Core: 32 Sample Midpoint(m) : 390.30 Sect/Pc #: 5/PCE 1C
ROCK = OL MICROPHYRIC BASALT
ALTERED;
Texture: DIABASIC,PORPHYRITIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 10%)
Size(mm): 0.3-0.7 Morphology: ANHEDRAL
COMPLETELY ALTERED TO GREEN CLAY*
Groundmass - PLAGIOCLASE ( 25%)
Size(mm): 0.1-0.5 Morphology: LATHS
STUBBY LATHS;
CLINOPYROXENE ( 25%)
Size(mm): 0.3-0.7 Morphology: OPHITIC
OPAQUE MINERALS ( 2%)
INCLUDES MAGN+ILMENITE, LONG BLADES;
GLASS ( 3%)
Morphology: INTERSTITIAL
DEVITRIFIED*
Alteration - CLAY MINERALS ( 30%)
Location: INTERSTITIAL Replacing: OL,PLAG
GREEN,FIBROUS*
Vesicles -
Percent: 0
Leg : 55 Top/Bottom Interval(mm): 1230/1320 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 383.50 Rock Type: IGNEOUS
Core: 32 Sample Midpoint(m) : 390.78 Sect/Pc #: 5/
ROCK = OL MOD PHYRIC BASALT
OL THOLEIITE, SOURCE IS IR, 67% ALTERED;
Texture: MOD PHYRIC,SUBOPHITIC*
Phenocrysts- OLIVINE ( 8%)
Size(mm): 0.79
Groundmass - PLAGIOCLASE ( 47%)
Size(mm): .01-.75
ABOUT 70% REPLACED BY GREEN SMECTITE IN CORES;
CLINOPYROXENE ( 29%)
Size(mm): .001-.25
OLIVINE ( 11%)
Size(mm): .005-.50
TOTALLY REPLACED BY FIBROUS OLIVE-GREEN SMECTITE
AND IDDINGSITE;
MAGNETITE ( 3%)
Size(mm): .005-.15
ILMENITE ( 3%)
Size(mm): .008-.25
PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - SMECTITE
Location: PLAG CORES Replacing: OL,PLAG
IDDINGSITE
Replacing: OL
Vesicles -
Size(mm): .34-5.00
Percent: 36
Filling: SMECTITE
Shape: ROUND-OVOID
FILLED WITH FIBROUS OLIVE-GREEN SMECTITE*
Leg : 55 Top/Bottom Interval(mm): 340/ 360 Describer: Dalrymple, G.
Hole: 433C Top of Core Depth(m) : 393.00 Rock Type: IGNEOUS
Core: 33 Sample Midpoint(m) : 393.35 Sect/Pc #: 1/PCE 3B
ROCK = OL-PLAG PHYRIC BASALT;
Texture: PORPHYRITIC,DIABASIC
DIABASIC GROUNDMASS;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 15%)
Size(mm): 1-4 Morphology: SUBHEDRAL
75% ALTERED GREEN+BROWN CLAY,IDDINGSITE RIMS;
PLAGIOCLASE ( 2%)
Size(mm): 2-4
Groundmass - OLIVINE ( 2%)
Size(mm): 0.03-1 Morphology: GRANULAR
ALTERED TO IDDINGS;
PLAGIOCLASE ( 25%)
Size(mm): 0.1-0.5 Morphology: LATHS
CLINOPYROXENE ( 20%)
Size(mm): 0.3-0.5 Morphology: OPHITIC
OPAQUE MINERALS ( 3%)
Size(mm): 0.01-0.1
INCLUDES MAGN+ILMENITE,STUBBY BLADES;
GLASS ( 2%)
DEVITRIFIED*
Alteration - CARBONATE ( 1%)
Location: INTERSTITIAL
CLAY MINERALS ( 20%)
Location: INTERSTITIAL Replacing: GROUNDMASS
GREEN,FIBROUS*
Vesicles -
Percent: 0
Leg : 55 Top/Bottom Interval(mm): 120/ 140 Describer: Dalrymple, G.
Hole: 433C Top of Core Depth(m) : 393.00 Rock Type: IGNEOUS
Core: 33 Sample Midpoint(m) : 396.13 Sect/Pc #: 3/PCE 1B
ROCK = OL PHYRIC BASALT;
Texture: PORPHYRITIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 15%)
Size(mm): 0.5-3 Morphology: SUBHEDRAL
50% ALTERED TO BROWN CLAY,SOME IDDINGS*
Groundmass - OLIVINE ( 3%)
Size(mm): 0.02-0.5 Morphology: GRANULAR
ALTERED TO BROWN CLAY+IDDINGS;
PLAGIOCLASE ( 25%)
Size(mm): 0.1-0.3 Morphology: LATHS
STUBBY LATHS,MUCH GOING TO CLAY,SOME FRESH;
CLINOPYROXENE ( 25%)
Size(mm): 0.1-0.2 Morphology: OPHITIC
OPAQUE MINERALS ( 5%)
Size(mm): 0.01-0.1 Morphology: BLADES
INCLUDES MAGN+ILMENITE;
GLASS ( 2%)
Morphology: INTERSTITIAL
DEVITRIFIED,CLOUDED WITH OP.MINS*
Alteration - CLAY MINERALS ( 25%)
Location: GROUNDMASS Replacing: GROUNDMASS
COLORLESS*
Leg : 55 Top/Bottom Interval(mm): 130/ 190 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 393.00 Rock Type: IGNEOUS
Core: 33 Sample Midpoint(m) : 396.16 Sect/Pc #: 3/
ROCK = OL PHYRIC BASALT
THOLEIITIC PICRITE, SOURCE IS IR, 38% ALTERED;
Texture: PHYRIC,OPHITIC*
Phenocrysts- OLIVINE ( 34%)
Size(mm): 1.36
Groundmass - PLAGIOCLASE ( 30%)
Size(mm): .01-.91
CLINOPYROXENE ( 27%)
Size(mm): .01-.50
OLIVINE ( 5%)
Size(mm): .01-.50
ABOUT HALF REPLACED BY PALE YELLOW SMECTITE AND
IDDINGSITE;
ILMENITE ( 3%)
Size(mm): .01-.35
MAGNETITE ( 2%)
Size(mm): .005-.15
PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - SMECTITE
Replacing: OL
IDDINGSITE
Replacing: OL
Leg : 55 Top/Bottom Interval(mm): 1200/1220 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 393.00 Rock Type: IGNEOUS
Core: 33 Sample Midpoint(m) : 398.71 Sect/Pc #: 4/PCE 6B
ROCK = OL PHYRIC BASALT
EXTENSIVELY ALTERED;
Texture: PORPHYRITIC,INTERSERTAL
UNCERTAIN IF INSERTAL;
Where sampled: NEXT TO GLASSY MARGIN OR FLOW INTERIOR*
Phenocrysts- OLIVINE ( 20%)
Size(mm): 0.5-3.0 Morphology: EUHEDRAL
ENTIRELY ALTERED TO CLAY.MIN+IDDINGS*
Groundmass - OLIVINE ( 8%)
Size(mm): 0.05 Morphology: EUHEDRAL-ANHEDRAL
TOTALLY ALTERED,MOSTLY TO IDDINGS;
PLAGIOCLASE ( 25%)
Size(mm): 0.05-0.6 Morphology: LATHS,SKELETAL
CLINOPYROXENE ( 7%)
Size(mm): 0.05-0.3 Morphology: ANHEDRAL,DENDRITIC FANS
OPAQUE MINERALS ( 5%)
INCLUDES MAGN+ILMENITE;
GLASS ( 15%)
ID UNCERTAIN,DARK INTERSTITIAL MATERIAL*
Alteration - CLAY MINERALS ( 5%)
Location: VUGS,GRAINS Replacing: OL
GREEN,FIBROUS*
Vesicles -
Size(mm): TO 5
Percent: 15
Location: THROUGHOUT
Filling: MOSTLY OPEN
Shape: OVAL
Leg : 55 Top/Bottom Interval(mm): 1030/1110 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 402.50 Rock Type: IGNEOUS
Core: 34 Sample Midpoint(m) : 405.07 Sect/Pc #: 2/
ROCK = OL-PLAG PHYRIC BASALT
THOLEIITIC PICRITE, SOURCE IS IR, 36% ALTERED;
Texture: PHYRIC,OPHITIC*
Phenocrysts- OLIVINE ( 15%)
Size(mm): 2.07
CONTAIN CHROMITE;
PLAGIOCLASE ( 1%)
Size(mm): 0.89
Groundmass - PLAGIOCLASE ( 47%)
Size(mm): .02-1.00
CLINOPYROXENE ( 26%)
Size(mm): .02-.50
SOME REPLACED BY YELLOW-BROWN AMPHIBOLE(?);
OLIVINE ( 5%)
Size(mm): .01-.50
TOTALLY ALTERED TO SMECTITE AND IDDINGSITE;
ILMENITE ( 4%)
Size(mm): .01-.35 Morphology: ELONGATE
TITANOMAGNETITE ( 1%)
Size(mm): .003-.15 Morphology: EQUANT
EXSOLVED;
PYRITE
PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - AMPHIBOLE
Replacing: CPX
SMECTITE
Replacing: OL
IDDINGSITE
Replacing: OL
Leg : 55 Top/Bottom Interval(mm): 410/ 430 Describer: Dalrymple, G.
Hole: 433C Top of Core Depth(m) : 402.50 Rock Type: IGNEOUS
Core: 34 Sample Midpoint(m) : 405.92 Sect/Pc #: 3/PCE 1D
ROCK = OL MOD PHYRIC BASALT;
Texture: PORPHYRITIC,DIABASIC
DIABASIC GROUNDMASS;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 7%)
Size(mm): 0.5-3 Morphology: SUBHEDRAL
TOTALLY ALTERED TO BROWN CLAY,IDDINGS RIMS*
Groundmass - OLIVINE ( 2%)
Size(mm): 0.01-0.5 Morphology: GRANULAR
ALTERED TO IDDINGS;
PLAGIOCLASE ( 38%)
Size(mm): 0.1-0.5 Morphology: LATHS
MOST FRESH,SOME GOING TO CLAY.MINS;
CLINOPYROXENE ( 40%)
Size(mm): 0.1-0.6 Morphology: OPHITIC
OPAQUE MINERALS ( 3%)
Size(mm): 0.03-0.1 Morphology: BLADES
INCLUDES MAGN+ILMENITE*
Alteration - CLAY MINERALS ( 10%)
Location: GROUNDMASS Replacing: GROUNDMASS
COLORLESS,FIBROUS,SOME GREEN*
Vesicles -
Percent: 0
Leg : 55 Top/Bottom Interval(mm): 680/ 700 Describer: Dalrymple, G.
Hole: 433C Top of Core Depth(m) : 402.50 Rock Type: IGNEOUS
Core: 34 Sample Midpoint(m) : 407.69 Sect/Pc #: 4/PCE 4A
ROCK = OL PHYRIC BASALT;
Texture: PORPHYRITIC,DIABASIC
DIABASIC GROUNDMASS*
Phenocrysts- OLIVINE ( 10%)
Size(mm): 0.5-2 Morphology: SUBHEDRAL
90% ALTERED TO CLAY.MINS,IDDINGS RIMS, FEW FRESH
CORES*
Groundmass - OLIVINE ( 3%)
Size(mm): 0.05-.5 Morphology: GRANULAR
ALTERED TO IDDINGS;
PLAGIOCLASE ( 20%)
Size(mm): 0.1-0.7 Morphology: LATHS
PARTLY ALTERED TO CLAY.MINS;
CLINOPYROXENE ( 28%)
Size(mm): .05-1 Morphology: OPHITIC
COLORLESS TO PALE BROWN;
OPAQUE MINERALS ( 5%)
Size(mm): 0.02-0.1 Morphology: EQUANT GRAINS
INCLUDES MAGN+ILMENITE;
GLASS ( 15%)
Morphology: INTERSTITIAL
DEVITRIFIED,CLOUDED BY OXIDES*
Alteration - CARBONATE ( 5%)
Location: VESICLE
CLAY MINERALS ( 10%)
Location: INTERSTITIAL Replacing: GROUNDMASS
GREEN*
Vesicles -
Percent: 5
Leg : 55 Top/Bottom Interval(mm): 1020/1090 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 402.50 Rock Type: IGNEOUS
Core: 34 Sample Midpoint(m) : 408.06 Sect/Pc #: 4/
ROCK = OL-PLAG MOD PHYRIC BASALT
OL THOLEIITE, SOURCE IS IR, 22% ALTERED;
Texture: MOD PHYRIC,INTERGRANULAR*
Phenocrysts- OLIVINE ( 7%)
Size(mm): 1.13
PLAGIOCLASE ( 1%)
Size(mm): 0.49
Groundmass - CLINOPYROXENE (40-50%)
Size(mm): <.001-.005
PLAGIOCLASE (35-40%)
Size(mm): .005-.84
CORES REPLACED BY PALE SMECTITE;
ILMENITE ( 7-8%)
Size(mm): .008-.25
OLIVINE ( 5-7%)
Size(mm): .01-.50
TOTALLY REPLACED BY PALE-GREEN TO BUFF SMECTITE
AND IDDINGSITE;
MAGNETITE ( 2-3%)
Size(mm): <.001-.10
PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - CALCITE
SMECTITE
Location: CORES Replacing: PLAG,OL
IDDINGSITE
PHILLIPSITE
AMPHIBOLE
Vesicles -
Size(mm): .02-6.05
Percent: 13
Shape: ROUND-
Shape: IRREGULAR
Leg : 55 Top/Bottom Interval(mm): 960/ 980 Describer: Dalrymple, G.
Hole: 433C Top of Core Depth(m) : 402.50 Rock Type: IGNEOUS
Core: 34 Sample Midpoint(m) : 412.47 Sect/Pc #: 7/PCE 3K
ROCK = OL-PLAG MOD PHYRIC BASALT;
Texture: PORPHYRITIC,INTERGRANULAR
FINE-GRAINED INTERGRANULAR GROUNDMASS;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 5%)
Size(mm): 0.5-2 Morphology: EUHEDRAL
95% ALTERED TO BROWN CLAY;
PLAGIOCLASE ( 2%)
Size(mm): 0.5-1 Morphology: ANHEDRAL
Groundmass - OLIVINE ( 3%)
Size(mm): 0.1-0.5 Morphology: GRANULAR
ALTERED TO IDDINGS;
PLAGIOCLASE ( 25%)
Size(mm): 0.05-0.3 Morphology: LATHS
LONG LATHS;
CLINOPYROXENE ( 45%)
Size(mm): 0.005-0.1 Morphology: GRANULAR
COLORLESS;
OPAQUE MINERALS ( 15%)
Size(mm): 0.01-0.06 Morphology: EQUANT
INCLUDES MAGN+ILMENITE*
Alteration - CLAY MINERALS ( 5%)
Location: INTERSTITIAL
YELLOW-BROWN,FIBROUS*
Vesicles -
Percent: 0
Leg : 55 Top/Bottom Interval(mm): 1140/1210 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 402.50 Rock Type: IGNEOUS
Core: 34 Sample Midpoint(m) : 412.68 Sect/Pc #: 7/
ROCK = OL-PLAG-CPX PHYRIC BASALT
OL THOLEIITE, SOURCE IS IR, 23% ALTERED;
Texture: PHYRIC,INTERGRANULAR*
Phenocrysts- OLIVINE ( 10%)
Size(mm): 1.37
CONTAIN CHROMITE ZONED TO TO CR-RICH TITAND-MAGN;
PLAGIOCLASE ( 3%)
Size(mm): 0.78
CLINOPYROXENE ( <1%)
Size(mm): 1.20
Groundmass - PLAGIOCLASE ( 44%)
Size(mm): .01-.90
CLINOPYROXENE ( 36%)
Size(mm): <.001-.20
TITANOMAGNETITE ( 4%)
Size(mm): .001-.15 Morphology: EQUANT
TINY,EXSOLVED;
PYRITE
ILMENITE ( <1%)
Size(mm): .005-.20 Morphology: ELONGATE
OLIVINE ( 2%)
Size(mm): .01-.50
TOTALLY REPLACED BY SMECTITE AND IDDINGSITE,
PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - CARBONATE ( RARE%)
SMECTITE
Replacing: OL
IDDINGSITE
Replacing: OL
Vesicles -
Size(mm): .05-1.77
Percent: 6
Filling: SMECTITE
Shape: IRREGULAR-
Shape: BRANCHING
FILLED WITH FIBROUS PALE OLIVE-GREEN SMECTITE*
Leg : 55 Top/Bottom Interval(mm): 270/ 290 Describer: Dalrymple, G.
Hole: 433C Top of Core Depth(m) : 412.00 Rock Type: IGNEOUS
Core: 35 Sample Midpoint(m) : 419.78 Sect/Pc #: 6/PCE 1D
ROCK = OL-PLAG MOD PHYRIC BASALT
ROCK IS RELATIVELY FRESH;
Texture: PORPHYRITIC,INTERGRANULAR-SUBTRACHYTIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 5%)
Size(mm): 0.2-1.0 Morphology: ANHEDRAL
ALTERED TO BROWN CLAY,IDDINGS RIMS;
PLAGIOCLASE ( 3%)
Size(mm): 0.3-0.9 Morphology: LATHS
STUBBY LATHS,MOST IN OR NEAR OL-PLAG INCLUSIONS*
Groundmass - OLIVINE ( 2%)
Size(mm): 0.05-0.3 Morphology: GRANULAR
ALTERED TO IDDINGS;
PLAGIOCLASE ( 35%)
Size(mm): 0.1-0.8 Morphology: LATHS
FRESH;
CLINOPYROXENE ( 43%)
Size(mm): 0.01-0.05 Morphology: GRANULAR
COLORLESS;
OPAQUE MINERALS ( 7%)
Size(mm): 0.01-0.05 Morphology: EQUANT GRAINS
INCLUDES MAGN+ILMENITE*
Alteration - CLAY MINERALS ( 5%)
Location: INTERSTITIAL
GREEN*
Vesicles -
Percent: 0
Leg : 55 Top/Bottom Interval(mm): 1210/1290 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 412.00 Rock Type: IGNEOUS
Core: 35 Sample Midpoint(m) : 422.25 Sect/Pc #: 7/
ROCK = OL-PLAG MOD PHYRIC BASALT
THOLEIITE, SOURCE IS IR, 37% ALTERED;
Texture: MOD PHYRIC,SUBOPHITIC*
Phenocrysts- OLIVINE ( 2%)
Size(mm): 0.74
PLAGIOCLASE ( <1%)
Size(mm): 0.65
Groundmass - PLAGIOCLASE ( 47%)
Size(mm): .05-1.20
CLINOPYROXENE ( 36%)
Size(mm): .05-.50
OLIVINE ( 7%)
Size(mm): .03-.50
COMPLETELY ALTERED TO FIBROUS OLIVE-GREEN SMECTITE
AND IDDINGSITE;
ILMENITE ( 5%)
Size(mm): .03-.55
MAGNETITE ( 1%)
Size(mm): .01-.15
PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - SMECTITE
Replacing: OL
IDDINGSITE
Replacing: OL
Vesicles -
Size(mm): 1.80
Percent: 1
Filling: SMECTITE
Shape: ROUND-
Shape: OVOID
SIZE IS AVERAGE,RANGE IS 1.43-2.18MM, FILLED WITH
YELLOW-GREEN TO OLIVE-GREEN SMECTITE*
Leg : 55 Top/Bottom Interval(mm): 140/ 160 Describer: Dalrymple, G.
Hole: 433C Top of Core Depth(m) : 420.50 Rock Type: IGNEOUS
Core: 36 Sample Midpoint(m) : 422.15 Sect/Pc #: 2/PCE 1D
ROCK = OL MOD PHYRIC BASALT;
Texture: PORPHYRITIC,DIABASIC
DIABASIC GROUNDMASS;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 5%)
Size(mm): 0.5-2.5 Morphology: ANHEDRAL
COMPLETELY ALTERED TO COLORLESS CLAY,IDDINGS RIMS*
Groundmass - OLIVINE ( 3%)
Size(mm): 0.1-0.5 Morphology: GRANULAR
ALTERED TO IDDINGS;
PLAGIOCLASE ( 35%)
Size(mm): 0.1-0.8 Morphology: LATHS
STUBBY LATHS, 1/3 ALTERED TO CLAY.MINS;
CLINOPYROXENE ( 30%)
Size(mm): 0.1-0.3 Morphology: OPHITIC
COLORLESS;
OPAQUE MINERALS ( 7%)
Size(mm): 0.05-0.2 Morphology: BLADES
INCLUDES MAGN+ILMENITE;
GLASS ( 10%)
Morphology: INTERSTITIAL
DEVITRIFIED,CLOUDED,SOME ALTERATION TO CLAY.MINS*
Alteration - CLAY MINERALS ( 10%)
Location: INTERSTITIAL Replacing: GLASS,OL
Vesicles -
Size(mm): 1-5
Percent: 20
Filling: CLAY.MIN
Shape: IRREGULAR
BROWN CLAY,PERHAPS FILLED(PLUCKED IN MAKING TS)*
Leg : 55 Top/Bottom Interval(mm): 810/ 830 Describer: Dalrymple, G.
Hole: 433C Top of Core Depth(m) : 420.50 Rock Type: IGNEOUS
Core: 36 Sample Midpoint(m) : 424.32 Sect/Pc #: 3/
ROCK = OL PHYRIC BASALT;
Texture: PORPHYRITIC,DIABASIC
DIABASIC GROUNDMASS;
Where sampled: FLOW INTERIOR;
Phenocrysts- OLIVINE ( 15%)
Size(mm): 0.5-3 Morphology: SUBHEDRAL
95% ALTERED,CLEAR CLAY.MIN,IDDINGS RIMS*
Groundmass - OLIVINE ( 5%)
Size(mm): 0.05-0.5 Morphology: GRANULAR
ALTERED TO IDDINGS;
PLAGIOCLASE ( 33%)
Size(mm): 0.1-0.7 Morphology: LATHS
STUBBY LATHS,MOSTLY FRESH,SOME GOING TO CLAYS;
CLINOPYROXENE ( 25%)
Size(mm): 0.1-0.4 Morphology: OPHITIC
COLORLESS;
OPAQUE MINERALS ( 5%)
Size(mm): 0.05-0.2 Morphology: BLADES
INCLUDES MAGN+ILMENITE;
GLASS ( 7%)
Morphology: INTERSTITIAL
DEVITRIFIED,CLOUDED WITH OP.MINS*
Alteration - CARBONATE ( 5%)
Location: IRREGULAR Replacing: GROUNDMASS
Location: PATCHES
UNCERTAIN WHAT IS REPLACED;
CLAY MINERALS ( 5%)
Location: INTERSTITIAL Replacing: GLASS
GREEN,FIBROUS,UNSURE WHAT IS REPLACED*
Vesicles -
Percent: 0
Leg : 55 Top/Bottom Interval(mm): 520/ 540 Describer: Dalrymple, G.
Hole: 433C Top of Core Depth(m) : 420.50 Rock Type: IGNEOUS
Core: 36 Sample Midpoint(m) : 425.53 Sect/Pc #: 4/PCE 1F
ROCK = OL PHYRIC BASALT
BADLY ALTERED;
Texture: PORPHYRITIC, DIABASIC-INTERGRANULAR;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 15%)
Size(mm): 0.5-2 Morphology: ANHEDRAL
COMPLETELY ALTERED TO BROWN-CLEAR CLAY*
Groundmass - OLIVINE ( 2%)
Size(mm): 0.1-0.5 Morphology: GRANULAR
ALTERED TO IDDINGS;
PLAGIOCLASE ( 33%)
Size(mm): 0.1-0.5 Morphology: LATHS
STUBBY LATHS,ALTERED PARTLY TO CLAY.MINS;
CLINOPYROXENE ( 20%)
Size(mm): 0.05-0.2 Morphology: SUBOPHITIC
COLORLESS;
OPAQUE MINERALS ( 5%)
Size(mm): 0.02-0.1 Morphology: BLADES
INCLUDES MAGN+ILMENITE;
GLASS ( 10%)
Morphology: INTERSERTAL
DEVITRIFIED*
Alteration - CLAY MINERALS ( 15%)
Location: GROUNDMASS Replacing: GROUNDMASS
BROWN-COLORLESS*
Vesicles -
Percent: 0
Leg : 55 Top/Bottom Interval(mm): 1380/1480 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 420.50 Rock Type: IGNEOUS
Core: 36 Sample Midpoint(m) : 426.43 Sect/Pc #: 4/
ROCK = OL MOD PHYRIC BASALT
OL THOLEIITE, SOURCE IS IR, 45% ALTERED;
Texture: MOD PHYRIC,SUBOPHITIC*
Phenocrysts- OLIVINE ( 7%)
Size(mm): 1.24
Groundmass - PLAGIOCLASE ( 45%)
Size(mm): .01-.85
CLINOPYROXENE ( 38%)
Size(mm): .01-.41
RARE AMPHIBOLE(?) REPLACING CPX;
OLIVINE ( 4%)
Size(mm): .01-.50
TOTALLY REPLACED BY FIBROUS YELLOW-GREEN SMECTITE
WITH IDDINGSITE RIMS;
MAGNETITE ( 3%)
ILMENITE ( 3%)
PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - SMECTITE
Replacing: OL
IDDINGSITE
Location: RIMS Replacing: OL
AMPHIBOLE
Replacing: CPX
Vesicles -
Size(mm): .65-5.23
Percent: 9
Filling: CELAD,SMEC
Shape: ROUND-
Shape: IRREGULAR
VESICLES LINED OR FILLED WITH FIBROUS CELADONITE
AND SMECTITE*
Leg : 55 Top/Bottom Interval(mm): 1220/1250 Describer: Dalrymple, G.
Hole: 433C Top of Core Depth(m) : 420.50 Rock Type: IGNEOUS
Core: 36 Sample Midpoint(m) : 427.74 Sect/Pc #: 5/PCE 4J
ROCK = OL MOD PHYRIC BASALT;
Texture: PORPHYRITIC,DIABASIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 7%)
Size(mm): 0.5-2 Morphology: SUBHEDRAL
COMPLETELY ALTERED TO CLEAR CLAY,IDDINGS RIMS*
Groundmass - OLIVINE ( 3%)
Size(mm): 0.05-0.5 Morphology: GRANULAR
PLAGIOCLASE ( 35%)
Size(mm): 0.1-0.5 Morphology: LATHS
STUBBY LATHS,GOING TO CLAY;
CLINOPYROXENE ( 35%)
Size(mm): 0.1-0.3 Morphology: OPHITIC
COLORLESS;
OPAQUE MINERALS ( 5%)
Size(mm): 0.01-0.1 Morphology: BLADES
INCLUDES MAGN+ILMENITE;
GLASS ( 10%)
Morphology: INTERSTITIAL
DEVITRIFIED,CLOUDED WITH OPAQUES*
Alteration - CLAY MINERALS ( 40%)
Location: VESICLES,
Location: GROUNDMASS
MOSTLY COLORLESS*
Vesicles -
Percent: 30
Leg : 55 Top/Bottom Interval(mm): 790/ 870 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 431.00 Rock Type: IGNEOUS
Core: 37 Sample Midpoint(m) : 434.83 Sect/Pc #: 3/
ROCK = OL SPARSELY PHYRIC BASALT
THOLEIITE, SOURCE IS IR, 18% ALTERED;
Texture: SPARSELY PHYRIC,SUBOPHITIC*
Phenocrysts- OLIVINE ( 2%)
Size(mm): 0.75
CONTAIN CHROMITE*
Groundmass - PLAGIOCLASE ( 57%)
Size(mm): .03-1.35
CLINOPYROXENE ( 32%)
Size(mm): .02-.50
OLIVINE ( 4%)
Size(mm): .05-.50
TOTALLY REPLACED BY FIBROUS OLIVE GREEN SMECTITE
AND IDDINGSITE;
ILMENITE ( 4%)
Size(mm): .05-.50 Morphology: ELONGATE
MAGNETITE ( 1%)
Size(mm): .01-.34 Morphology: EQUANT-SKELETAL
PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - IDDINGSITE
Replacing: OL
SMECTITE
Replacing: OL
Leg : 55 Top/Bottom Interval(mm): 1030/1050 Describer: Dalrymple, G.
Hole: 433C Top of Core Depth(m) : 431.00 Rock Type: IGNEOUS
Core: 37 Sample Midpoint(m) : 435.04 Sect/Pc #: 3/PCE 1Q
ROCK = OL SPARSELY PHYRIC BASALT;
Texture: INTERGRANULAR*
Phenocrysts- OLIVINE ( 1%)
Size(mm): 0.5-1 Morphology: SUBHEDRAL
COMPLETELY ALTERED TO CLAY WITH IDDINGS RIMS;
Groundmass - OLIVINE ( 7%)
Size(mm): 0.1-0.5 Morphology: GRANULAR
IDDINGS+CLAY,NOT FRESH;
PLAGIOCLASE ( 40%)
Size(mm): 0.05-0.7 Morphology: LATHS
STUBBY LATHS,FRESH;
CLINOPYROXENE ( 35%)
Size(mm): 0.1-0.5 Morphology: GRANULAR
COLORLESS;
OPAQUE MINERALS ( 7%)
Size(mm): 0.02-0.2 Morphology: BLADES
INCLUDES MAGN+ILMENITE*
Alteration - CLAY MINERALS ( 10%)
Location: INTERSTITIAL Replacing: GLASS,GROUNDMASS
GREEN*
Vesicles -
Percent: 0
Leg : 55 Top/Bottom Interval(mm): 670/ 760 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 440.50 Rock Type: IGNEOUS
Core: 38 Sample Midpoint(m) : 441.22 Sect/Pc #: 1/
ROCK = OL MOD PHYRIC BASALT
OL THOLEIITE, SOURCE IS IR, 31% ALTERED;
Texture: MOD PHYRIC,OPHITIC*
Phenocrysts- OLIVINE ( 9%)
Size(mm): 1.10
CONTAIN CHROMITE THAT IS ZONED TO CR-RICH TITANO-
MAGN*
Groundmass - PLAGIOCLASE ( 50%)
Size(mm): .01-.65
CLINOPYROXENE ( 33%)
Size(mm): .01-.50
PYRITE
OLIVINE ( 5%)
Size(mm): .01-.50
ABOUT 20% ALTERED TO PALE YELLOW FIBROUS SMECTITE
WITH FIBROUS YELLOW-DEEP GREEN AND BRIGHT BLUE-
GREEN(PLEOCHROIC)SMECTITE ALONG FRACTURES AND
RIMS;
ILMENITE ( 3%)
Size(mm): .01-.42 Morphology: ELONGATE
MAGNETITE ( 1%)
Size(mm): .001-.12
PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - PHILLIPSITE
SMECTITE
Replacing: OL
Leg : 55 Top/Bottom Interval(mm): 770/ 800 Describer: Dalrymple, G.
Hole: 433C Top of Core Depth(m) : 440.50 Rock Type: IGNEOUS
Core: 38 Sample Midpoint(m) : 441.29 Sect/Pc #: 1/PCE 1G
ROCK = OL MOD PHYRIC BASALT;
Texture: PORPHYRITIC,DIABASIC*
Phenocrysts- OLIVINE ( 5%)
Size(mm): 0.5-3 Morphology: ANHEDRAL
90% FRESH, SOME CLAY RIMS*
Groundmass - OLIVINE ( 10%)
Size(mm): 0.05-0.5 Morphology: GRANULAR
50% ALTERED TO CLAY.MINS;
PLAGIOCLASE ( 30%)
Size(mm): 0.01-0.2 Morphology: LATHS
20% ALTERED TO CLAY.MINS;
CLINOPYROXENE ( 38%)
Size(mm): 0.1-0.3 Morphology: OPHITIC
COLORLESS;
OPAQUE MINERALS ( 7%)
Size(mm): 0.01-0.1 Morphology: BLADES
INCLUDES MAGN+ILMENITE*
Alteration - CLAY MINERALS ( 10%)
Location: INTERSTITIAL Replacing: GROUNDMASS,PLAG
BRIGHT GREEN*
Vesicles -
Percent: 0
Leg : 55 Top/Bottom Interval(mm): 850/ 930 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 440.50 Rock Type: IGNEOUS
Core: 38 Sample Midpoint(m) : 447.39 Sect/Pc #: 5/
ROCK = OL SPARSELY PHYRIC BASALT
THOLEIITE, SOURCE IS IR, 37% ALTERED;
Texture: SPARSELY PHYRIC,OPHITIC*
Phenocrysts- OLIVINE ( 1%)
Size(mm): 0.60
Groundmass - PLAGIOCLASE ( 54%)
Size(mm): .01-1.35
CLINOPYROXENE ( 31%)
Size(mm): .01-.50
OLIVINE ( 10%)
Size(mm): .01-.50
TOTALLY REPLACED BY FIBROUS BUFF-GREEN SMECTITE
AND IDDINGSITE;
ILMENITE ( 5%)
Size(mm): .01-.45
PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - SMECTITE
Replacing: OL
IDDINGSITE
Replacing: OL
Leg : 55 Top/Bottom Interval(mm): 950/1010 Describer: Dalrymple, G.
Hole: 433C Top of Core Depth(m) : 440.50 Rock Type: IGNEOUS
Core: 38 Sample Midpoint(m) : 447.48 Sect/Pc #: 5/PCE 1O
ROCK = APHYRIC BASALT
NO PHENOS OBSERVED IN THIN SECTION;
Texture: DIABASIC;
Where sampled: FLOW INTERIOR*
Groundmass - OLIVINE ( 0%)
PLAGIOCLASE ( 35%)
Size(mm): .1-0.5 Morphology: LATHS
FRESH;
CLINOPYROXENE ( 35%)
Size(mm): 0.2-1 Morphology: OPHITIC
COLORLESS;
OPAQUE MINERALS ( 10%)
Morphology: BLADES
INCLUDES MAGN+ILMENITE*
Alteration - CLAY MINERALS ( 20%)
Location: INTERSTITIAL Replacing: GLASS,OL
GREEN AND BROWN*
Vesicles -
Percent: 0
Leg : 55 Top/Bottom Interval(mm): 870/ 940 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 450.00 Rock Type: IGNEOUS
Core: 39 Sample Midpoint(m) : 456.91 Sect/Pc #: 5/
ROCK = OL MOD PHYRIC BASALT
OL THOLEIITE, SOURCE IS IR, 18% ALTERED;
Texture: MOD PHYRIC,INTERGRANULAR*
Phenocrysts- OLIVINE ( 5%)
Size(mm): 1.21
CONTAIN CHROMITE THAT IS ZONED TO CR-RICH TITANO-
MAGN*
Groundmass - PLAGIOCLASE ( 47%)
Size(mm): .02-.50
CLINOPYROXENE ( 37%)
Size(mm): .005-.50
OLIVINE ( 8%)
Size(mm): .005-.50
ABOUT 80% ALTERED TO SMECTITE+CHLORITE AND
IDDINGSITE;
ILMENITE ( 2%)
Size(mm): .01-.35 Morphology: ELONGATE
SOME EXSOLVED;
MAGNETITE ( 2%)
Size(mm): .001-.20
PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - SMECTITE
Replacing: OL
CHLORITE
Replacing: OL
IDDINGSITE
Replacing: OL
Leg : 55 Top/Bottom Interval(mm): 1020/1040 Describer: Dalrymple, G.
Hole: 433C Top of Core Depth(m) : 450.00 Rock Type: IGNEOUS
Core: 39 Sample Midpoint(m) : 457.03 Sect/Pc #: 5/PCE 1E
ROCK = OL MOD PHYRIC BASALT;
Texture: PORPHYRITIC,INTERGRANULAR,FINE GRAINED
INTERGRANULAR GROUNDMASS*
Phenocrysts- OLIVINE ( 5%)
Size(mm): 0.5-1 Morphology: SUBHEDRAL
50% ALTERED TO CLAY.MINS+IDDINGS;
Groundmass - OLIVINE ( 3%)
Size(mm): 0.1-0.5 Morphology: GRANULAR
100% ALTERED TO IDDINGS AND GREEN CLAY;
PLAGIOCLASE ( 37%)
Size(mm): 0.02-0.2 Morphology: LATHS
FRESH;
CLINOPYROXENE ( 35%)
Size(mm): 0.02-0.06 Morphology: GRANULAR
COLORLESS;
OPAQUE MINERALS ( 5%)
Size(mm): 0.02-0.2 Morphology: BLADES
INCLUDES MAGN+ILMENITE*
Alteration - CLAY MINERALS ( 15%)
Location: INTERSTITIAL Replacing: GLASS,OL
GREEN AND BROWN*
Vesicles -
Percent: 0
Leg : 55 Top/Bottom Interval(mm): 880/ 960 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 459.50 Rock Type: IGNEOUS
Core: 40 Sample Midpoint(m) : 461.92 Sect/Pc #: 2/
ROCK = OL MOD PHYRIC BASALT
OL THOLEIITE, SOURCE IS IR, 19% ALTERED;
Texture: MOD PHYRIC,INTERGRANULAR*
Phenocrysts- OLIVINE ( 8%)
Size(mm): 1.43
CONTAIN CHROMITE*
Groundmass - PLAGIOCLASE ( 41%)
Size(mm): .01-.45
CLINOPYROXENE ( 38%)
Size(mm): .001-.25
OLIVINE ( 8%)
Size(mm): .05-.50
30% ALTERED TO SMECTITE+CHLORITE AND IDDINGSITE;
ILMENITE ( 3%)
Size(mm): .005-.25 Morphology: ELONGATE
MANY MOTTLED BECAUSE OF A COMBINATION OF HIGH AND
LOW TEMPERATURE OXIDATION;
MAGNETITE ( 2%)
Size(mm): .001-.20
NEARLY PURE MAGNETITE,PYRITE AND CHALCOPYRITE
PRESENT, PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - SMECTITE
Replacing: OL
CHLORITE
Replacing: OL
IDDINGSITE
Replacing: OL
Leg : 55 Top/Bottom Interval(mm): 920/ 970 Describer: Dalrymple, G.
Hole: 433C Top of Core Depth(m) : 459.50 Rock Type: IGNEOUS
Core: 40 Sample Midpoint(m) : 461.95 Sect/Pc #: 2/PCE 1G
ROCK = OL MOD PHYRIC BASALT;
Texture: PORPHYRITIC,INTERGRANULAR,FINE-GRAINED
INTERGRANULAR GROUNDMASS;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 1%)
Size(mm): 0.5-3 Morphology: GRANULAR
ALL ALTERED,CLAY.MINS+IDDINGS RIMS*
Groundmass - OLIVINE ( 1%)
Size(mm): 0.05-0.5 Morphology: GRANULAR
ALTERED TO CLAY.MINS+IDDINGS;
PLAGIOCLASE ( 30%)
Size(mm): 0.02-0.2 Morphology: LATHS
FRESH;
CLINOPYROXENE ( 35%)
Size(mm): 0.01-0.05 Morphology: GRANULAR
COLORLESS;
OPAQUE MINERALS ( 10%)
Size(mm): 0.02-0.1 Morphology: EQUANT,BLADES
INCLUDES MAGN+ILMENITE*
Alteration - CLAY MINERALS (15-20%)
Location: INTERSTITIAL Replacing: GROUNDMASS
GREENISH*
Vesicles -
Percent: 0
Leg : 55 Top/Bottom Interval(mm): 150/ 190 Describer: Dalrymple, G.
Hole: 433C Top of Core Depth(m) : 469.00 Rock Type: IGNEOUS
Core: 41 Sample Midpoint(m) : 469.17 Sect/Pc #: 1/
ROCK = APHYRIC BASALT
NO PHENOS WERE OBSERVED IN THIN SECTION;
Texture: INTERGRANULAR-INTERSERTAL,MEDIUM-COARSE GRAINED;
Where sampled: FLOW INTERIOR*
Groundmass - OLIVINE ( 1-2%)
Size(mm): 0.2
COMPLETELY ALTERED TO IDDINGS;
PLAGIOCLASE ( 40%)
Size(mm): 0.2-0.7
SOME ALTERATION TO SERICITE(?);
CLINOPYROXENE ( 30%)
Size(mm): 0.01-0.2
COLORLESS;
GLASS ( 10%)
Morphology: INTERSTITIAL
DEVITRIFIED (IED,A%)
Size(mm): LTERED TO Morphology: CLAY(?),BROWN;
OPAQUE MINERALS ( 10%)
Size(mm): .05-.15 Morphology: EQUANT
INCLUDES MAGNETITE+ILMENITE*
Alteration - ( 10%)
Replacing: GLASS
Vesicles -
Percent: 20
20% VOIDS,PLUCKED,NOT SURE HOW MUCH IS
VESICULARITY,IF ANY*
Leg : 55 Top/Bottom Interval(mm): 400/ 490 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 469.00 Rock Type: IGNEOUS
Core: 41 Sample Midpoint(m) : 469.45 Sect/Pc #: 1/
ROCK = PLAG-CPX MOD PHYRIC BASALT
THOLEIITE, SOURCE IS IR, 23% ALTERED;
Texture: MOD PHYRIC,INTERGRANULAR*
Phenocrysts- PLAGIOCLASE ( 2%)
Size(mm): .84
CLINOPYROXENE ( 1%)
Size(mm): 0.60
Groundmass - PLAGIOCLASE ( 50%)
Size(mm): .01-1.65
CLINOPYROXENE ( 40%)
Size(mm): .01-.50
MAGNETITE ( 3%)
Size(mm): .008-.15
HEMATITE AFTER SOME MAGNETITE;
ILMENITE ( 3%)
Size(mm): .01-.70
OLIVINE ( 1%)
Size(mm): .05-.50
PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - HEMATITE
Replacing: MAGN
Leg : 55 Top/Bottom Interval(mm): 20/ 60 Describer: Dalrymple, G.
Hole: 433C Top of Core Depth(m) : 469.00 Rock Type: IGNEOUS
Core: 41 Sample Midpoint(m) : 470.54 Sect/Pc #: 2/PCE 1A
ROCK = APHYRIC BASALT
NO PHENOS OBSERVED IN THIN SECTION;
Texture: INTERGRANULAR TO INTERSERTAL,MEDIUM-GRAINED*
Groundmass - OLIVINE ( 1-2%)
Size(mm): 0.2 Morphology: GRANULAR
COMPLETELY ALTERED TO IDDINGS;
PLAGIOCLASE ( 37%)
Size(mm): 0.1-0.8 Morphology: LATHS
MOSTLY FRESH,PARTLY ALTERED TO CLAY.MINS;
CLINOPYROXENE ( 35%)
Size(mm): 0.05-0.15 Morphology: GRANULAR
COLORLESS;
OPAQUE MINERALS ( 7%)
Size(mm): 0.04-0.4 Morphology: EQUANT BLADES
INCLUDES MAGN+ILMENITE;
GLASS ( 10%)
Morphology: INTERSTITIAL
COMPLETELY DEVITRIFIED AND ALTERED TO CLAY.MINS*
Alteration - CLAY MINERALS ( 10%)
Replacing: GLASS
BROWN, SEE VESICLES ABOVE*
Vesicles -
Percent: 10
10% VOIDS,NOT SURE HOW MUCH IS VESICULARITY*
Leg : 55 Top/Bottom Interval(mm): 510/ 580 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 469.00 Rock Type: IGNEOUS
Core: 41 Sample Midpoint(m) : 474.05 Sect/Pc #: 4/
ROCK = PLAG SPARSELY PHYRIC BASALT
THOLEIITE, SOURCE IS IR, 31% ALTERED;
Texture: SPARSELY PHYRIC,INTERGRANULAR*
Phenocrysts- PLAGIOCLASE ( 1%)
Size(mm): 1.04
Groundmass - PLAGIOCLASE ( 60%)
Size(mm): .01-1.25
CLINOPYROXENE ( 29%)
Size(mm): .01-.50
ILMENITE ( 6%)
Size(mm): .01-.40
MAGNETITE ( 3%)
Size(mm): .005-.15
HEMATITE AFTER SOME MAGNETITE;
OLIVINE ( 1%)
Size(mm): .05-.50
PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - HEMATITE
Replacing: MAGN
Leg : 55 Top/Bottom Interval(mm): 560/ 630 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 478.50 Rock Type: IGNEOUS
Core: 42 Sample Midpoint(m) : 479.10 Sect/Pc #: 1/
ROCK = OL-PLAG-CPX SPARSELY PHYRIC BASALT
THOLEIITE, SOURCE IS IR, 23% ALTERED;
Texture: SPARSELY PHYRIC,INTERGRANULAR*
Phenocrysts- OLIVINE ( 1%)
Size(mm): 0.78
PLAGIOCLASE ( <1%)
Size(mm): 1.16
CLINOPYROXENE ( <1%)
Size(mm): 0.67
Groundmass - PLAGIOCLASE ( 53%)
Size(mm): .01-1.85
CLINOPYROXENE ( 37%)
Size(mm): .01-.50
RARE AMPHIBOLE(?) AFTER CPX;
PYRITE
ILMENITE ( 4%)
Size(mm): .01-.67 Morphology: ELONGATE
OLIVINE ( 3%)
Size(mm): .05-.50
TOTALLY ALTERED TO BRIGHT BLUE-GREEN FIBROUS
SMECTITE AND IDDINGSITE;
TITANOMAGNETITE ( 2%)
Size(mm): .005-.30
EXSOLVED, PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - AMPHIBOLE
Replacing: CPX
ID UNCERTAIN FOR AMPHIBOLE;
SMECTITE
Replacing: OL
IDDINGSITE
Replacing: OL
Leg : 55 Top/Bottom Interval(mm): 110/ 150 Describer: Dalrymple, G.
Hole: 433C Top of Core Depth(m) : 478.50 Rock Type: IGNEOUS
Core: 42 Sample Midpoint(m) : 481.63 Sect/Pc #: 3/PCE 1B
ROCK = APHYRIC BASALT
NO PHENOS OBSERVED,FLOW UNIT 53- VERY SIMILAR
TO FLOW UNITS 51A+52;
Texture: INTERGRANULAR-INTERSERTAL,COARSE-GRAINED;
Where sampled: FLOW INTERIOR*
Groundmass - OLIVINE ( 1-2%)
Size(mm): 0.05-0.1 Morphology: GRANULAR
COMPLETELY ALTERED TO IDDINGS;
PLAGIOCLASE ( 46%)
Size(mm): 0.1-1 Morphology: LATHS
STUBBY LATHS,AVG SIZE .5MM,SOME ALTERED TO
SERICITE;
CLINOPYROXENE ( 35%)
Size(mm): 0.1-0.2 Morphology: EQUANT GRAINS
COLORLESS;
OPAQUE MINERALS ( 7%)
Size(mm): 0.03-0.15 Morphology: EQUANT,BLADES
INCLUDES MAGN+ILMENITE;
GLASS ( 10%)
Morphology: INTERGRANULAR
DEVITRIFIED,CLOUDED BY OPAQUES,ALTERED TO CLAYS*
Alteration - CLAY MINERALS
Location: INTERGRANULAR Replacing: GLASS
CLAY MINERALS
Location: VESICLES Replacing: VOIDS
TOTAL IS 30%*
Vesicles -
Size(mm): 0.5-1
Percent: 20
Filling: CLAY.MIN
Shape: ROUND
BROWN CLAY RIMS WITH GREEN CLAY(FIBROUS) FILLINGS*
Leg : 55 Top/Bottom Interval(mm): 110/ 200 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 478.50 Rock Type: IGNEOUS
Core: 42 Sample Midpoint(m) : 481.66 Sect/Pc #: 3/
ROCK = PLAG-CPX-OL PHYRIC BASALT
PLAG THOLEIITE, SOURCE IS IR, 24% ALTERED;
Texture: PHYRIC,INTERGRANULAR*
Phenocrysts- PLAGIOCLASE ( 17%)
Size(mm): 1.61
CLINOPYROXENE ( 4%)
Size(mm): 1.25
OLIVINE ( 1%)
Size(mm): 0.85
Groundmass - PLAGIOCLASE ( 46%)
Size(mm): .01-1.80
CLINOPYROXENE ( 26%)
Size(mm): .005-.50
OLIVINE ( 2%)
Size(mm): .05-.50 Morphology: ROUNDED,EMBAYED
TOTALLY ALTERED TO FIBROUS OLIVE-GREEN SMECTITE
AND IDDINGSITE;
PYRITE
ILMENITE ( 2%)
Size(mm): .01-.51 Morphology: ELONGATE
TITANOMAGNETITE ( 1%)
Size(mm): .005-.39 Morphology: SKELETAL
PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - SMECTITE
Replacing: OL
IDDINGSITE
Replacing: OL
Leg : 55 Top/Bottom Interval(mm): 350/ 380 Describer: Dalrymple, G.
Hole: 433C Top of Core Depth(m) : 478.50 Rock Type: IGNEOUS
Core: 42 Sample Midpoint(m) : 484.87 Sect/Pc #: 5/
ROCK = PLAG-CPX PHYRIC BASALT
FLOW UNIT 54- SIMILAR TO FU 51-53 EXCEPT
WITH PHENOS OF PLAG+PYX;
Texture: PORPHYRITIC,INTERGRANULAR-INTERSERTAL;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 0%)
PLAGIOCLASE ( 7%)
Size(mm): 0.5-1.5
STUBBY(2:1) XTLS, AGGREGATES, FRESH;
CLINOPYROXENE ( 4%)
Size(mm): 0.5-1.5 Morphology: ANHEDRAL
COLORLESS, SOMETIMES WITH PLAG IN AGGREGATES*
Groundmass - OLIVINE ( 1%)
Size(mm): 0.1 Morphology: EQUANT,ANHEDRAL
COMPLETELY ALTERED TO IDDINGS;
PLAGIOCLASE ( 3.%)
Size(mm): 0.1-0.5 Morphology: LATHS
STUBBY LATHS, MOSTLY FRESH,5% ALTERED TO SERICITE;
CLINOPYROXENE ( 35%)
Size(mm): 0.05-0.5 Morphology: GRANULAR
COLORLESS,FRESH;
OPAQUE MINERALS ( 7%)
Size(mm): 0.05-0.15 Morphology: EQUANT,BLADES
INCLUDES MAGN+ILMENITE;
GLASS ( 7%)
Morphology: INTERGRANULAR
DEVITRIFIED,CLOUDED BY OP.MINS,ALTERED TO BROWN
CLAY.MINS*
Alteration - CLAY MINERALS ( 10%)
Location: VESICLES,
Location: INTERGRANULAR
7% INTERGRANULAR,BROWN,FIBROUS GREEN*
Vesicles -
Size(mm): 1
Percent: 2
Location: RIMS,
Filling: CLAY.MINS
Shape: ROUND
Location: XTL CENTERS
BROWN AND FIBROUS GREEN*
Leg : 55 Top/Bottom Interval(mm): 850/ 900 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 478.50 Rock Type: IGNEOUS
Core: 42 Sample Midpoint(m) : 485.38 Sect/Pc #: 5/
ROCK = PLAG-OL-CPX PHYRIC BASALT
PLAG THOLEIITE, SOURCE IS IR, 12% ALTERED;
Texture: PHYRIC,INTERGRANULAR*
Phenocrysts- PLAGIOCLASE ( 14%)
Size(mm): 1.89
OLIVINE ( 1%)
Size(mm): 1.04
CLINOPYROXENE ( 1%)
Size(mm): 1.34
Groundmass - PLAGIOCLASE ( 42%)
Size(mm): .005-1.11
CLINOPYROXENE ( 35%)
Size(mm): .01-.50
ILMENITE ( 4%)
Size(mm): .01-.55 Morphology: ELONGATE
OLIVINE ( 2%)
Size(mm): .01-.50 Morphology: ROUNDED,EMBAYED
CONTAINS RARE CHROMITE,TOTALLY ALTERED TO BRIGHT
BLUE-GREEN FIBROUS SMECTITE AND IDDINGSITE;
TITANOMAGNETITE ( 1%)
Size(mm): .005-.30 Morphology: EQUANT
EXSOLVED, PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - SMECTITE
Replacing: OL
IDDINGSITE
Replacing: OL
Leg : 55 Top/Bottom Interval(mm): 310/ 350 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 497.50 Rock Type: IGNEOUS
Core: 44 Sample Midpoint(m) : 497.83 Sect/Pc #: 1/
ROCK = OL-PLAG-CPX MOD PHYRIC BASALT
OL THOLEIITE, SOURCE IS IR, 24% ALTERED;
Texture: MOD PHYRIC,SUBOPHITIC*
Phenocrysts- OLIVINE ( 7%)
Size(mm): 0.85
PLAGIOCLASE ( <1%)
Size(mm): 0.74
CLINOPYROXENE ( <1%)
Size(mm): 0.48
Groundmass - PLAGIOCLASE ( 47%)
Size(mm): .01-1.34
CLINOPYROXENE ( 37%)
Size(mm): .05-.50
ILMENITE ( 4%)
Size(mm): .01-.90
MAGNETITE ( 3%)
Size(mm): .005-.25
OLIVINE ( <1%)
Size(mm): .05-.50
TOTALLY ALTERED TO FIBROUS OLIVE-GREEN SMECTITE
AND IDDINGSITE, PERCENTAGES OBTAINED BY POINT
COUNT*
Alteration - SMECTITE
Replacing: OL
IDDINGSITE
Replacing: OL
Leg : 55 Top/Bottom Interval(mm): 1170/1190 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 497.50 Rock Type: IGNEOUS
Core: 44 Sample Midpoint(m) : 500.18 Sect/Pc #: 2/PCE 10A
ROCK = OL-PLAG-CPX MOD PHYRIC BASALT;
Texture: INTERSERTAL,PORPHYRITIC;
Where sampled: GLASSY MARGIN*
Phenocrysts- OLIVINE ( 3%)
Size(mm): 0.5-1.2 Morphology: EUHEDRAL
ALTERED TO IDDINGS+CLAY.MINS;
PLAGIOCLASE ( 2%)
Size(mm): 0.5-1.5 Morphology: EUHEDRAL
CLINOPYROXENE ( 2%)
Size(mm): 0.5-1.0 Morphology: EUHEDRAL
AUGITE*
Groundmass - OLIVINE ( 6%)
Size(mm): 0.1-0.5 Morphology: EUHEDRAL,EQUANT
ALTERED TO IDDINGS;
PLAGIOCLASE ( 20%)
Size(mm): 0.1-0.5 Morphology: EUHEDRAL,LATHS
CLINOPYROXENE ( 7%)
Size(mm): 0.1-0.5 Morphology: EUHEDRAL,EQUANT
GLASS ( 40%)
ALTERED COMPLETELY*
Alteration - CLAY MINERALS ( 10%)
Location: CRACK,VESICLE
45% AFTER GLASS+OL;
ZEOLITE ( 10%)
Location: VESICLES
RADIATING AGGREGATES*
Leg : 55 Top/Bottom Interval(mm): 740/ 810 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 497.50 Rock Type: IGNEOUS
Core: 44 Sample Midpoint(m) : 502.78 Sect/Pc #: 4/
ROCK = PLAG-CPX SPARSELY PHYRIC BASALT
THOLEIITE, SOURCE IS IR, 23% ALTERED;
Texture: SPARSELY PHYRIC,INTERGRANULAR*
Phenocrysts- PLAGIOCLASE ( 1%)
Size(mm): 0.85
CLINOPYROXENE ( 1%)
Size(mm): 0.78
Groundmass - PLAGIOCLASE ( 53%)
Size(mm): .01-1.19
CLINOPYROXENE ( 35%)
Size(mm): .005-.50
ILMENITE ( 6%)
Size(mm): .01-.35
MAGNETITE ( 2%)
Size(mm): .005-.15
OLIVINE ( 1%)
Size(mm): .01-.50
PERCENTAGES OBTAINED BY POINT COUNT*
Vesicles -
Size(mm): .35-1.41
Percent: 1
Filling: SMECTITE
Shape: ROUND
FILLED OR LINED WITH FIBROUS YELLOW-BROWN TO OLIVE
GREEN SMECTITE*
Leg : 55 Top/Bottom Interval(mm): 260/ 330 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 507.00 Rock Type: IGNEOUS
Core: 45 Sample Midpoint(m) : 508.80 Sect/Pc #: 2/
ROCK = PLAG-CPX MOD PHYRIC BASALT
THOLEIITE, SOURCE IS IR, 22% ALTERED;
Texture: MOD PHYRIC,INTERGRANULAR*
Phenocrysts- PLAGIOCLASE ( 2%)
Size(mm): 0.84
CLINOPYROXENE ( 1%)
Size(mm): 0.73
Groundmass - PLAGIOCLASE ( 50%)
Size(mm): .01-1.37
CLINOPYROXENE ( 40%)
Size(mm): .005-.50
ILMENITE ( 4%)
Size(mm): .01-.43
MAGNETITE ( 2%)
Size(mm): .003-.20
HEMATITE REPLACES SOME MAGNETITE;
OLIVINE ( 1%)
Size(mm): .01-.50
TOTALLY ALTERED TO SMECTITE+CELADONITE AND
IDDINGSITE, PERCENTAGES OBTAINED BY POINT COUNTS*
Alteration - HEMATITE
Replacing: MAGN
CELADONITE
Replacing: OL
SMECTITE
Replacing: OL
IDDINGSITE
Replacing: OL
Leg : 55 Top/Bottom Interval(mm): 20/ 40 Describer: Dalrymple, G.
Hole: 433C Top of Core Depth(m) : 507.00 Rock Type: IGNEOUS
Core: 45 Sample Midpoint(m) : 513.03 Sect/Pc #: 5/PCE 1A
ROCK = PLAG-OL PHYRIC BASALT
THIS ROCK SIMILAR TO FLOW UNIT 54 BUT MORE
PORPHYRITIC,FLOW UNIT 60;
Phenocrysts- OLIVINE ( 2%)
Size(mm): 0.5-0.7 Morphology: ANHEDRAL
COLORLESS;
PLAGIOCLASE ( 10%)
Size(mm): 0.5-1.5 Morphology: SUBHEDRAL
TWINNED,FRESH,SOME GLASS BLEBS IN XTL CENTER*
Groundmass - OLIVINE ( 2%)
Size(mm): 0.1-0.2 Morphology: GRANULAR
COMPLETELY ALTERED TO IDDINGS+CLAY;
PLAGIOCLASE ( 35%)
Size(mm): 0.1-0.5 Morphology: LATHS
STUBBY LATHS,FRESH;
CLINOPYROXENE ( 37%)
Size(mm): 0.02-0.5 Morphology: GRANULAR
COLORLESS;
OPAQUE MINERALS ( 7%)
Size(mm): 0.05-0.2 Morphology: EQUANT,BLADES
INCLUDES MAGN+ILMENITE;
GLASS ( 7%)
Morphology: INTERSTITIAL
COMPLETELY ALTERED TO BROWN CLAY*
Alteration - CLAY MINERALS ( 7-10%)
Location: INTERSTITIAL Replacing: OL,GLASS
Vesicles -
Percent: 0
Leg : 55 Top/Bottom Interval(mm): 960/1040 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 507.00 Rock Type: IGNEOUS
Core: 45 Sample Midpoint(m) : 514.00 Sect/Pc #: 5/
ROCK = PLAG-CPX-OL PHYRIC BASALT
PLAG THOLEIITE, SOURCE IS IR, 15% ALTERED;
Texture: PHYRIC,INTERGRANULAR*
Phenocrysts- PLAGIOCLASE ( 8%)
Size(mm): 1.59
CLINOPYROXENE ( 1%)
Size(mm): 1.03
OLIVINE ( 1%)
Size(mm): 0.73
Groundmass - PLAGIOCLASE ( 48%)
Size(mm): .01-1.30
CLINOPYROXENE ( 22%)
Size(mm): .01-.50
ILMENITE ( 4%)
Size(mm): .02-.60
OLIVINE ( 3%)
Size(mm): .05-.50
TOTALLY ALTERED TO OLIVE-GREEN SMECTITE;
MAGNETITE ( 2%)
Size(mm): .01-.25
PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - SMECTITE
Replacing: OL
Leg : 55 Top/Bottom Interval(mm): 30/ 90 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 507.00 Rock Type: IGNEOUS
Core: 45 Sample Midpoint(m) : 517.56 Sect/Pc #: 8/
ROCK = PLAG-CPX-OL MOD PHYRIC BASALT
THOLEIITE, SOURCE IS IR, 23% ALTERED;
Texture: MOD PHYRIC,INTERGRANULAR*
Phenocrysts- PLAGIOCLASE ( 3%)
Size(mm): 1.29
CLINOPYROXENE ( 1%)
Size(mm): 1.43
OLIVINE ( <1%)
Size(mm): 0.78
Groundmass - ALKALI FELDSPAR ( RARE%)
PLAGIOCLASE ( 58%)
Size(mm): .01-1.25
CLINOPYROXENE ( 32%)
Size(mm): .005-.50
OLIVINE ( 4%)
Size(mm): .03-.50
TOTALLY ALTERED TO SMECTITE+CELADONITE AND
IDDINGSITE;
MAGNETITE ( 1%)
Size(mm): .005-.12
PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - SMECTITE
Replacing: OL
CELADONITE
Replacing: OL
IDDINGSITE
Replacing: OL
Leg : 55 Top/Bottom Interval(mm): 430/ 510 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 516.50 Rock Type: IGNEOUS
Core: 46 Sample Midpoint(m) : 519.97 Sect/Pc #: 3/
ROCK = PLAG-CPX-OL MOD PHYRIC BASALT
THOLEIITE, SOURCE IS IR, 30% ALTERED;
Texture: MOD PHYRIC,INTERGRANULAR*
Phenocrysts- PLAGIOCLASE ( 4%)
Size(mm): 1.17
CLINOPYROXENE ( 1%)
Size(mm): 0.81
OLIVINE ( 1%)
Size(mm): 0.74
Groundmass - PLAGIOCLASE ( 56%)
Size(mm): .01-1.03
ALKALI FELDSPAR REPLACES SOME PLAG CORES;
CLINOPYROXENE ( 29%)
Size(mm): .01-.50
OLIVINE ( 3%)
Size(mm): .06-.50
TOTALLY ALTERED TO IDDINGSITE AND MINOR SMECTITE
AND CELADONITE;
ILMENITE ( 3%)
Size(mm): .02-.37
MAGNETITE ( 2%)
Size(mm): .005-.20
PERCENTAGES OBTAINED BY POINT COUNTS*
Alteration - ALKALI FELDSPAR
Location: CORES Replacing: PLAG
IDDINGSITE
Replacing: OL
SMECTITE
Replacing: OL
CELADONITE
Replacing: OL
Leg : 55 Top/Bottom Interval(mm): 720/ 740 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 516.50 Rock Type: IGNEOUS
Core: 46 Sample Midpoint(m) : 520.23 Sect/Pc #: 3/PCE 2C
ROCK = OL-PLAG-CPX MOD PHYRIC BASALT
ROCK IS EXTENSIVELY ALTERED;
Texture: INTERSTITIAL,PORPHYRITIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 31%)
Size(mm): 0.5-1.5 Morphology: EUHEDRAL
ALTERED TO IDDINGS+CLAY.MIN;
PLAGIOCLASE ( 3%)
Size(mm): 0.5-2.0 Morphology: EUHEDRAL
SOME GLOMEROCRYSTS WITH PYX;
CLINOPYROXENE ( 2%)
Size(mm): 0.5-1.6 Morphology: EUHEDRAL
SECTOR ZONED*
Groundmass - OLIVINE ( 5%)
Size(mm): 0.2-0.5 Morphology: EUHEDRAL
TOTALLY ALTERED TO CLAY.MINS+IDDINGSITE;
PLAGIOCLASE ( 19%)
Size(mm): 0.2-0.5 Morphology: LATHS
CLINOPYROXENE ( 35%)
Size(mm): 0.1-0.5 Morphology: ANHEDRAL
OPAQUE MINERALS ( 5%)
Size(mm): 0.05-0.25 Morphology: ANHEDRAL
INCLUDES MAGN+ILMENITE*
Alteration - CLAY MINERALS ( 20%)
Location: VESICLES
GREEN,FIBROUS;
CLAY MINERALS ( 10%)
Location: GROUNDMASS
DARK,10% AFTER OL,PLAG,PYX*
Leg : 55 Top/Bottom Interval(mm): 870/ 890 Describer: Dalrymple, G.
Hole: 433C Top of Core Depth(m) : 526.00 Rock Type: IGNEOUS
Core: 47 Sample Midpoint(m) : 532.88 Sect/Pc #: 5/PCE 6B
ROCK = PLAG-OL MOD MICROPHYRIC BASALT;
Texture: INTERGRANULAR,SUBTRACHYTIC,FINE GRAINED
LOCALLY SUBTRACHYTIC*
Phenocrysts- OLIVINE ( 2%)
Size(mm): 0.7 Morphology: ANHEDRAL-SUBHEDRAL
COMPLETELY ALTERED TO IDDINGS,MICROPHENOS;
PLAGIOCLASE ( 2%)
Size(mm): 0.5 Morphology: SUBHEDRAL
FRESH,MICROPHENOS*
Groundmass - OLIVINE ( 2%)
Size(mm): 0.05-0.2 Morphology: GRANULAR
ALTERED TO IDDINGS;
PLAGIOCLASE ( 45%)
Size(mm): 0.01X0.1 Morphology: LATHS
OPAQUE MINERALS ( 15%)
Size(mm): 0.01-0.02 Morphology: EQUANT
INCLUDES MAGN+ILMENITE;
CLINOPYROXENE ( 25%)
Size(mm): 0.01-0.02 Morphology: GRANULAR
COLORLESS*
Alteration - CLAY MINERALS ( 10%)
Location: INTERSTITIAL Replacing: GROUNDMASS,GLASS
GREEN*
Vesicles -
Size(mm): 0.5-1
Percent: 5
Filling: CLAY.MIN
Shape: IRREGULAR
BROWN CLAY IN LININGS,GREEN IN FILLINGS*
Leg : 55 Top/Bottom Interval(mm): 920/1000 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 526.00 Rock Type: IGNEOUS
Core: 47 Sample Midpoint(m) : 532.96 Sect/Pc #: 5/
ROCK = OL-PLAG MOD PHYRIC BASALT
THOLEIITE, SOURCE IS IR, 20-23% ALTERED;
Texture: MOD PHYRIC,MICROLITIC,INTERGRANULAR*
Phenocrysts- OLIVINE ( 2%)
Size(mm): 1.39
PLAGIOCLASE ( 1%)
Size(mm): 1.05
Groundmass - CLINOPYROXENE (40-45%)
Size(mm): <.001-.13
PLAGIOCLASE (30-35%)
Size(mm): .005-.87
PHILLIPSITE REPLACES SOME PLAG;
PYRITE
TITANOMAGNETITE ( 7-10%)
Size(mm): <.001-.15 Morphology: EQUANT
TINY,EXSOLVED;
ILMENITE ( 1-2%)
Size(mm): .005-.19
OLIVINE ( 5-7%)
Size(mm): <.001-.50
TOTALLY ALTERED TO IDDINGSITE,NO CLAYS DETECTED,
PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - PHILLIPSITE
Replacing: PLAG
IDDINGSITE
Replacing: OL
CLAY ( 0%)
Vesicles -
Size(mm): .02-3.38
Percent: 11
Filling: PHILLIPS,SMEC
Shape: IRREGULAR
FILLED WITH PHILLIPSITE AND RARE SMECTITE*
Leg : 55 Top/Bottom Interval(mm): 1440/1500 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 535.50 Rock Type: IGNEOUS
Core: 48 Sample Midpoint(m) : 539.97 Sect/Pc #: 3/
ROCK = OL-PLAG SPARSELY PHYRIC BASALT
THOLEIITE, SOURCE IS IR, 24% ALTERED;
Texture: SPARSELY PHYRIC,INTERSERTAL*
Phenocrysts- OLIVINE ( 1%)
Size(mm): 0.83
PLAGIOCLASE ( 1%)
Size(mm): 0.69
Groundmass - PLAGIOCLASE ( 51%)
Size(mm): .02-1.32
MUCH OF GROUNDMASS STAINS YELLOW WITH SODIUM
COBALT-NITRITE;
CLINOPYROXENE ( 32%)
Size(mm): .02-1.35
OLIVINE ( 11%)
Size(mm): .01-.50
TOTALLY ALTERED TO IDDINGSITE AND SMECTITE;
MAGNETITE ( 2%)
Size(mm): .005-.05
ILMENITE ( 1%)
Size(mm): .01-.50
PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - IDDINGSITE
Replacing: OL
SMECTITE
Replacing: OL
Vesicles -
Size(mm): .41-4.05
Percent: 17
Filling: SMECTITE
Shape: OVOID-
Shape: IRREGULAR
LINED WITH PALE YELLOW-GREEN FIBROUS SMECTITE*
Leg : 55 Top/Bottom Interval(mm): 170/ 240 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 545.00 Rock Type: IGNEOUS
Core: 49 Sample Midpoint(m) : 546.71 Sect/Pc #: 2/
ROCK = PLAG-OL-CPX MOD PHYRIC BASALT
THOLEIITE, SOURCE IS IR, 27% ALTERED;
Texture: MOD PHYRIC,INTERSERTAL*
Phenocrysts- PLAGIOCLASE ( 2%)
Size(mm): 0.87
OLIVINE ( 1%)
Size(mm): 0.76
CLINOPYROXENE ( 1%)
Size(mm): 0.78
Groundmass - PLAGIOCLASE ( 60%)
Size(mm): .02-1.20
MANY PLAG CORES REPLACED BY K-FELDSPAR;
CLINOPYROXENE ( 17%)
Size(mm): .01-.50
PHILLIPSITE AND AMPHIBOLE(?) AFTER CPX;
PYRITE
OLIVINE ( 12%)
Size(mm): .01-.50
CONTAINS RARE CHROMITE,TOTALLY ALTERED TO
IDDINGSITE AND SMECTITE;
ILMENITE ( 6%)
Size(mm): .01-.85 Morphology: ELONGATE
TITANOMAGNETITE ( 1%)
Size(mm): .005-.55 Morphology: EQUANT
RARELY EXSOLVED,
KFELDSPAR ( 1%)
PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - KFELDSPAR ( 1%)
Location: CORES Replacing: PLAG
PHILLIPSITE
Replacing: CPX
AMPHIBOLE
Replacing: CPX
ID UNCERTAIN FOR AMPHIBOLE;
IDDINGSITE
Replacing: OL
SMECTITE
Replacing: OL
Leg : 55 Top/Bottom Interval(mm): 310/ 360 Describer: Kirkpatrick, J.
Hole: 433C Top of Core Depth(m) : 545.00 Rock Type: IGNEOUS
Core: 49 Sample Midpoint(m) : 546.84 Sect/Pc #: 2/PCE 1D
ROCK = APHYRIC BASALT;
Texture: SUBOPHITIC,APHYRIC;
Where sampled: FLOW INTERIOR*
Groundmass - OLIVINE ( 10%)
Size(mm): 0.08-0.6 Morphology: SUBHEDRAL
ALTERED TO IDDINGS;
PLAGIOCLASE ( 35%)
Size(mm): 0.15-1.5 Morphology: LATHS
CLINOPYROXENE ( 25%)
Size(mm): 0.4-2.0 Morphology: ANHEDRAL,SUBOPHITIC
OPAQUE MINERALS ( 5%)
Size(mm): 0.1-0.3 Morphology: ANHEDRAL,SKELETAL
INCLUDES MAGN+ILMENITE;
GLASS ( 5%)
DEVITRIFIED*
Alteration - CLAY MINERALS ( 15%)
Location: VESICLES,
Location: GROUNDMASS
GREEN FIBROUS (MAY BE ZEOLITE)*
Vesicles -
Size(mm): TO 1
Percent: 5
Location: THROUGHOUT
Shape: IRREGULAR,
Shape: OVAL
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