Leg : 69 Top/Bottom Interval(mm): 510/ 530 Describer: Pertsev, N.
Hole: 504A Top of Core Depth(m) : 265.00 Rock Type: IGNEOUS
Core: 6 Sample Midpoint(m) : 265.52 Sect/Pc #: 1/PCE 11
ROCK = PLAG-CPX-OL MOD MICROPHYRIC BASALT;
Texture: MOD MICROPHYRIC,OPHITIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 1%)
Size(mm): TO .5 Morphology: EUHEDRAL
PLAGIOCLASE ( 4%)
Size(mm): .5-1.5 Morphology: EUHEDRAL,SUBHEDRAL,LATHS,
Morphology: GLOMEROCRYSTS
CORE APPROX COMP AN73, RIM APPROX COMP AN67;
CLINOPYROXENE ( 2%)
Size(mm): .5-1 Morphology: SUBHEDRAL GLOMEROCRYSTS
Groundmass - OLIVINE ( 5%)
Size(mm): .1-.3 Morphology: ANHEDRAL
PLAGIOCLASE ( 38%)
Size(mm): .1-.7 Morphology: MICROLITES
CLINOPYROXENE ( 45%)
Size(mm): .1-.5 Morphology: RADIATED AGGREGATES+GRAINS
MAGNETITE ( 5%)
Size(mm): .1-.3 Morphology: SUBHEDRAL,SKELETAL
Alteration - CARBONATE ( <.5%)
Location: VEINS,OL Replacing: OL
Location: PSEUDOMORPHS
CLAY MINERALS ( 6%)
Location: VEINS Replacing: OL
OLIVE BROWN DARK SMECTITE*
Vesicles -
Size(mm): TO .2
Percent: 1
Filling: SMECTITE
Shape: ROUND
Leg : 69 Top/Bottom Interval(mm): 570/ 590 Describer: Pertsev, N.
Hole: 504A Top of Core Depth(m) : 265.00 Rock Type: IGNEOUS
Core: 6 Sample Midpoint(m) : 265.58 Sect/Pc #: 1/PCE 12
ROCK = PLAG-OL-CPX MOD MICROPHYRIC BASALT;
Texture: MOD MICROPHYRIC,OPHITIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 1%)
Size(mm): .2-.5 Morphology: EUHEDRAL
PLAGIOCLASE ( 4%)
Size(mm): .5-2 Morphology: EUHEDRAL,SUBHEDRAL
CLINOPYROXENE ( 1%)
Size(mm): .5-1 Morphology: SUBHEDRAL,ANHEDRAL
Groundmass - OLIVINE ( 4%)
Size(mm): .1-.2 Morphology: SUBHEDRAL,ANHEDRAL
PLAGIOCLASE ( 40%)
Size(mm): .1-.7 Morphology: MICROLITES
CLINOPYROXENE ( 45%)
Size(mm): .1-.5 Morphology: RADIATED AGGREGATES+GRAINS
MAGNETITE ( 5%)
Size(mm): .1-.3 Morphology: SUBHEDRAL,SKELETAL
Alteration - CLAY MINERALS ( 5%)
Replacing: OL
OLIVE BROWN SMECTITE*
Leg : 69 Top/Bottom Interval(mm): 940/ 960 Describer: Pertsev, N.
Hole: 504A Top of Core Depth(m) : 265.00 Rock Type: IGNEOUS
Core: 6 Sample Midpoint(m) : 267.45 Sect/Pc #: 2/PCE 40
ROCK = PLAG-CPX-OL MICROPHYRIC BASALT;
Texture: MICROPHYRIC,OPHITIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 1%)
Size(mm): .2-.5 Morphology: EUHEDRAL
PLAGIOCLASE ( 15%)
Size(mm): .3-2 Morphology: EUHEDRAL,SUBHEDRAL
CLINOPYROXENE ( 5%)
Size(mm): .3-1 Morphology: SUBHEDRAL,ANHEDRAL
Groundmass - OLIVINE ( 5%)
Size(mm): .05-.15 Morphology: ANHEDRAL
PLAGIOCLASE ( 25%)
Size(mm): .05-.5 Morphology: MICROLITES
CLINOPYROXENE ( 43%)
Size(mm): .05-.3 Morphology: RADIATED AGGREGATES
MAGNETITE ( 5%)
Size(mm): .05-.1 Morphology: ANHEDRAL
Alteration - CLAY MINERALS ( 7%)
Location: VESICLES Replacing: OL
OLIVE BROWN SMECTITE*
Vesicles -
Size(mm): TO 2
Percent: 1
Filling: SMECTITE
Shape: ROUND
Leg : 69 Top/Bottom Interval(mm): 130/ 170 Describer: damson, A.C.
Hole: 504A Top of Core Depth(m) : 265.00 Rock Type: IGNEOUS
Core: 6 Sample Midpoint(m) : 268.15 Sect/Pc #: 3/PCE 48
ROCK = PLAG-OL-CPX MOD PHYRIC BASALT;
Texture: MOD PHYRIC,HOLOXTLLINE,SUBOPHITIC,VARIOLITIC
SUBOPHITIC TEXTURE BETWEEN CPX AND PLAG;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE
Size(mm): .3-1 Morphology: EUHEDRAL,SUBHEDRAL
PSEUDOMORPHS;
PLAGIOCLASE
Size(mm): .3-1 Morphology: EUHEDRAL,SUBHEDRAL
PLAGIOCLASE
Size(mm): 1-3 Morphology: SUBHEDRAL
GLOMEROCRYSTS(1-3MM)NOT COMMON(3 ON SLIDE),WITH
AN68 COMPOSITION;
CLINOPYROXENE
Size(mm): .3-1 Morphology: ANHEDRAL
Groundmass - OLIVINE ( 1-5%)
Size(mm): .1-.3 Morphology: EUHEDRAL,SUBHEDRAL
PERCENT IS FOR TOTAL OL;
PLAGIOCLASE (20-40%)
Size(mm): .1-.3 Morphology: EUHEDRAL,SUBHEDRAL
PERCENT IS FOR TOTAL PLAG IN SECTION,APPROX COMP
AN60-80,OFTEN ZONED(CORES AN78,RIMS AN65),MORE
SODIC ON EXTERIORS,INTERIOR HAS ROUNDED EDGES;
CLINOPYROXENE
Size(mm): .1-.3 Morphology: ANHEDRAL
CLINOPYROXENE ( 5-10%)
Size(mm): .03-.1 Morphology: ANHEDRAL
PERCENT IS FOR TOTAL CPX;
SPHERULITIC MESOSTASIS (20-40%)
MAY BE CPX(YELLOW INTERFERENCE COLORS IN SOME
AREAS AROUND EDGES);
TITANOMAGNETITE ( 1-5%)
Size(mm): .01-.03 Morphology: SUBHEDRAL
ASSOCIATED WITH THE MESOSTASIS*
Alteration - GOETHITE
Location: VESICLES+
Location: CRACKS
ID UNCERTAIN FOR GOETHITE;
SMECTITE
Location: VESICLES+ Replacing: OL
Location: CRACKS
SEVERAL IRREGULAR PATCHES OF SMECTITE SHOW STRONG
IRON STAINING IN THEIR CORES-CHANGING FROM DARK
GREEN TO YELLOW TO ORANGE AND THEN RUST FROM
WEATHERED BASALT INTO THE CORE-MAY BE PATHS FOR
HYDROTHERMAL ALTERATION,SIMILAR ZONING IN SMALL
VEINS,OR REVERSED*
Vesicles -
Size(mm): .1-.3
Percent: .5-1
Filling: SMECTITE
Shape: ROUND
Leg : 69 Top/Bottom Interval(mm): 610/ 620 Describer: Pertsev, N.
Hole: 504A Top of Core Depth(m) : 265.00 Rock Type: IGNEOUS
Core: 6 Sample Midpoint(m) : 268.62 Sect/Pc #: 3/PCE 54
ROCK = PLAG-OL-CPX MOD PHYRIC BASALT
THERE IS OXIDATION ZONALITY(ALONG A CRACK)- THE
CRACK IS FILLED WITH BRIGHT RED-BROWN CLAY MINERAL
CONTAMINATED IRON OXIDES, NEXT ZONE CONTAINS
ALMOST BLACK(VERY DARK GREEN)CLAY FILLINGS OF
VESICLES AND OL PSEUDOMORPHS, THE LAST PART OF THE
ROCK IN THE SECTION CONTAINS USUAL OLIVE GREEN
FILLINGS OF VESICLES AND OL PSEUDOMORPHS;
Texture: MOD PHYRIC,VARIOLITIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE
Size(mm): .3-1 Morphology: EUHEDRAL,SUBHEDRAL,ANHEDRAL
PLAGIOCLASE
Size(mm): 1-3 Morphology: EUHEDRAL,SUBHEDRAL
PLAGIOCLASE
Size(mm): .3-1 Morphology: EUHEDRAL,SUBHEDRAL
CLINOPYROXENE
Size(mm): .3-1 Morphology: ANHEDRAL
Groundmass - OLIVINE
Size(mm): .1-.3 Morphology: EUHEDRAL,SUBHEDRAL,ANHEDRAL
OLIVINE ( 1-5%)
Size(mm): .03-.1 Morphology: EUHEDRAL,SUBHEDRAL,ANHEDRAL
PERCENT IS FOR TOTAL OL IN SECTION;
PLAGIOCLASE
Size(mm): .1-.3 Morphology: EUHEDRAL,SUBHEDRAL
PLAGIOCLASE (20-40%)
Size(mm): .03-.1 Morphology: EUHEDRAL,SUBHEDRAL
PERCENT IS FOR TOTAL PLAG IN SECTION;
CLINOPYROXENE
Size(mm): .1-.3 Morphology: ANHEDRAL
CLINOPYROXENE ( 5-10%)
Size(mm): .03-.1 Morphology: ANHEDRAL
PERCENT IS FOR TOTAL CPX IN SECTION;
SPHERULITIC MESOSTASIS (20-40%)
TITANOMAGNETITE ( 1-5%)
Alteration - SMECTITE
Location: VESICLES Replacing: OL
Vesicles -
Percent: .5-1
Filling: SMECTITE
Shape: ROUND
Leg : 69 Top/Bottom Interval(mm): 750/ 770 Describer: Pertsev, N.
Hole: 504A Top of Core Depth(m) : 273.00 Rock Type: IGNEOUS
Core: 7 Sample Midpoint(m) : 273.76 Sect/Pc #: 1/PCE 67
ROCK = PLAG-CPX MOD PHYRIC BASALT;
Texture: MOD PHYRIC,OPHITIC,VARIOLITIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE
Size(mm): 1-3 Morphology: EUHEDRAL,SUBHEDRAL
PLAGIOCLASE
Size(mm): .3-1 Morphology: EUHEDRAL,SUBHEDRAL
CLINOPYROXENE
Size(mm): .3-1 Morphology: SUBHEDRAL,ANHEDRAL
Groundmass - OLIVINE
Size(mm): .1-.3 Morphology: SUBHEDRAL,ANHEDRAL
PERCENT IS FOR TOTAL OL;
OLIVINE ( 1-5%)
Size(mm): .03-.1 Morphology: SUBHEDRAL,ANHEDRAL
PLAGIOCLASE (20-40%)
Size(mm): .1-.3 Morphology: EUHEDRAL,SUBHEDRAL
PERCENT IS FOR TOTAL PLAG IN SECTION;
CLINOPYROXENE (20-40%)
Size(mm): .1-.3 Morphology: SUBHEDRAL,ANHEDRAL
PERCENT IS FOR TOTAL CPX IN SECTION;
SPHERULITIC MESOSTASIS (10-20%)
TITANOMAGNETITE
Size(mm): .1-.3
TITANOMAGNETITE ( 1-5%)
Size(mm): .03-.1
PERCENT IS FOR TOTAL TITANO-MAGN*
Alteration - SMECTITE
Replacing: OL
Leg : 69 Top/Bottom Interval(mm): 1410/1450 Describer: Pertsev, N.
Hole: 504A Top of Core Depth(m) : 273.00 Rock Type: IGNEOUS
Core: 7 Sample Midpoint(m) : 274.43 Sect/Pc #: 1/PCE 76
ROCK = PLAG-OL-CPX SPARSELY PHYRIC BASALT;
Texture: PHYRIC,VARIOLITIC;
Where sampled: PILLOW RIM*
Phenocrysts- OLIVINE ( 1-5%)
Size(mm): 1-3 Morphology: EUHEDRAL
PLAGIOCLASE
Size(mm): 1-3 Morphology: EUHEDRAL
PLAGIOCLASE ( 5-10%)
Size(mm): .3-1 Morphology: EUHEDRAL
PERCENT IS FOR TOTAL PLAG;
CLINOPYROXENE
Size(mm): 1-3 Morphology: SUBHEDRAL
CLINOPYROXENE ( 1-5%)
Size(mm): .3-1 Morphology: SUBHEDRAL
PERCENT IS FOR TOTAL CPX*
Groundmass - SPHERULITIC MESOSTASIS ( 80%)
Alteration - SMECTITE
Location: VESICLES Replacing: OL
LIGHT OLIVE BROWN*
Vesicles -
Size(mm): .3-1
Percent: 1-5
Filling: SMECTITE
Shape: ROUND
Leg : 69 Top/Bottom Interval(mm): 280/ 300 Describer: Pertsev, N.
Hole: 504A Top of Core Depth(m) : 273.00 Rock Type: IGNEOUS
Core: 7 Sample Midpoint(m) : 274.79 Sect/Pc #: 2/PCE 79
ROCK = PLAG-OL-CPX PHYRIC BASALT;
Texture: PHYRIC;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE
Size(mm): 1-3 Morphology: EUHEDRAL
OLIVINE ( 1-5%)
Size(mm): .3-1 Morphology: EUHEDRAL
PERCENT IS FOR TOTAL OL;
PLAGIOCLASE
Size(mm): 3-10 Morphology: EUHEDRAL,SUBHEDRAL
PLAGIOCLASE
Size(mm): 1-3 Morphology: EUHEDRAL,SUBHEDRAL
PLAGIOCLASE (10-20%)
Size(mm): .3-1 Morphology: EUHEDRAL,SUBHEDRAL
PERCENT IS FOR TOTAL PLAG;
CLINOPYROXENE
Size(mm): 1-3 Morphology: ANHEDRAL
CLINOPYROXENE ( 1-5%)
Size(mm): .3-1 Morphology: ANHEDRAL
PERCENT IS FOR TOTAL CPX*
Groundmass - SPHERULITIC MESOSTASIS ( 60%)
TITANOMAGNETITE ( 1-5%)
Size(mm): .1-.3
Alteration - CELADONITE
Location: VESICLES Replacing: OL
GREEN*
Vesicles -
Size(mm): 1-3
Filling: CELADONITE
Shape: ROUND
Size(mm): .3-1
Percent: 1-5
Filling: CELADONITE
Shape: ROUND
PERCENT IS FOR TOTAL VESICLES*
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