Leg : 59 Top/Bottom Interval(mm): 530/ 560 Describer: Scott, R.
Hole: 448 Top of Core Depth(m) : 214.00 Rock Type: TUFF
Core: 24 Sample Midpoint(m) : 216.05 Sect/Pc #: 2/
ROCK = PEBBLY TUFF
THIN SECTION IS OF GRAINS IN SEDIMENT*
Groundmass - PLAGIOCLASE
ZONED,BASALTIC DEBRIS;
CLINOPYROXENE
BASALTIC DEBRIS;
GLASS
PUMICE FRAGMENTS
OTHER
ALTERED VOLCANIC FRAGMENTS*
Leg : 59 Top/Bottom Interval(mm): 880/1020 Describer: Scott, R.
Hole: 448 Top of Core Depth(m) : 214.00 Rock Type: TUFF
Core: 24 Sample Midpoint(m) : 216.45 Sect/Pc #: 2/
ROCK = VITRIC TUFF
THIN SECTION IS OF GRAINS IN SEDIMENT*
Groundmass - OLIVINE
BASALTIC DEBRIS;
PLAGIOCLASE
APPROX COMP AN64,BASALTIC DEBRIS;
CLINOPYROXENE
BASALTIC DEBRIS;
GLASS
PUMICE FRAGMENTS*
Leg : 59 Top/Bottom Interval(mm): 1010/1040 Describer: Scott, R.
Hole: 448 Top of Core Depth(m) : 214.00 Rock Type: TUFF
Core: 24 Sample Midpoint(m) : 216.53 Sect/Pc #: 2/
ROCK = VITRIC TUFF
THIN SECTION IS OF GRAINS IN SEDIMENT*
Groundmass - OLIVINE
PLAGIOCLASE
ZONED;
CLINOPYROXENE
GLASS
PUMICE FRAGMENTS;
OTHER
BASALT FRAGMENTS*
Leg : 59 Top/Bottom Interval(mm): 360/ 400 Describer: Scott, R.
Hole: 448 Top of Core Depth(m) : 233.00 Rock Type: TUFF
Core: 26 Sample Midpoint(m) : 233.38 Sect/Pc #: 1/
ROCK = TUFFACEOUS VOLCANICLASTIC BRECCIA
THIN SECTION IS OF GRAINS IN SEDIMENT*
Groundmass - OLIVINE
BASALTIC;
PLAGIOCLASE
ZONED,APPROX COMP AN74,BASALTIC;
CLINOPYROXENE
BASALTIC;
OPAQUE MINERALS
INCLUDES MAGN + ILMENITE,BASALTIC;
GLASS
PUMICE FRAGMENTS,DEFINITELY NOT IGNIMBRITE--
CONTINUOUS GLASS FIBERS AND XTLS--NOT PARALLEL
ELONGATION;
OTHER
BASALT FRAGMENTS*
Leg : 59 Top/Bottom Interval(mm): 1400/1420 Describer: Scott, R.
Hole: 448 Top of Core Depth(m) : 233.00 Rock Type: TUFF
Core: 26 Sample Midpoint(m) : 234.41 Sect/Pc #: 1/
ROCK = TUFFACEOUS VOLCANICLASTIC BRECCIA
THIN SECTION IS OF CLASTS IN SEDIMENTARY ROCKS*
Groundmass - PLAGIOCLASE
APPROX COMP AN64,BASALTIC?;
GLASS
PUMICE FRAGMENTS;
QUARTZ
ONE GRAIN (>1 MM IN DIAMETER);
OTHER
TUFF--CONSOLIDATED NOT WELDED--ALTERED TO
ZEOLITES;
OTHER
BASALT FRAGMENTS*
Alteration - ZEOLITE
Location: TUFF
Leg : 59 Top/Bottom Interval(mm): 1300/1330 Describer: Scott, R.
Hole: 448 Top of Core Depth(m) : 309.00 Rock Type: TUFF
Core: 34 Sample Midpoint(m) : 310.32 Sect/Pc #: 1/
ROCK = TUFFACEOUS VOLCANICLASTIC BRECCIA
THIN SECTION IS OF GRAINS IN SEDIMENT*
Groundmass - GLASS
BASALTIC VESICULAR GLASS WITH PHENOCRYSTS OF OL +
PLAG + CPX + MAGNETITE*
OLIVINE
PLAGIOCLASE
APPROX COMP AN76;
CLINOPYROXENE
MAGNETITE
Leg : 59 Top/Bottom Interval(mm): 180/ 210 Describer: Scott, R.
Hole: 448 Top of Core Depth(m) : 318.50 Rock Type: TUFF
Core: 35 Sample Midpoint(m) : 319.66 Sect/Pc #: CC/
ROCK = LITHIC TUFF
THIN SECTION IS THROUGH SEDIMENT SECTION OF CORE,
ROCK TYPES OF CLASTS: 1)HYALOPILITIC BASALT
2)BASALTIC? PUMICE 3)ALTERED TRACHYTIC ANDESITE?
4)ALTERED OXIDIZED BASALTIC VARIOLITIC GLASS?
5)ONE QUARTZ GRAIN, CLASTS CEMENTED WITH ZEOLITES*
Alteration - ZEOLITE
CEMENTS THE ROCK CLASTS INTO A LITHIC TUFF*
Leg : 59 Top/Bottom Interval(mm): 50/ 70 Describer: Zakariakze, G.
Hole: 448 Top of Core Depth(m) : 337.50 Rock Type: IGNEOUS
Core: 37 Sample Midpoint(m) : 337.56 Sect/Pc #: 1/PCE 2
ROCK = PLAG-OL MODERATELY PHYRIC THOLEIITE;
Texture: MODERATELY PORPHYRITIC,INTERSERTAL-HYALOPILITIC;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( 1%)
Size(mm): 0.5 Morphology: EUHEDRAL
PSEUDOMORPHS;
PLAGIOCLASE ( 1%)
Size(mm): 2 Morphology: EUHEDRAL
Groundmass - OLIVINE ( 1%)
Size(mm): 0.02 Morphology: IRREGULAR GRAINS
PLAGIOCLASE ( 40%)
Size(mm): 0.01 Morphology: ELONGATE LATHS
CLINOPYROXENE ( 20%)
Size(mm): <0.005 Morphology: IRREGULAR
OPAQUE MINERALS ( 2-3%)
Size(mm): <0.005 Morphology: IRREGULAR
INCLUDES MAGN + ILMENITE
GLASS (15-20%)
COMPLETELY ALTERED*
Alteration - CLAY MINERALS
Replacing: GLASS,PLAG,OL
Vesicles -
Size(mm): 0.2
Percent: 10
Filling: CARB
Shape: SPERICAL,
Shape: IRREGULAR
MOST OF THEM ARE EMPTY*
Leg : 59 Top/Bottom Interval(mm): 1370/1390 Describer: Scott, R.
Hole: 448 Top of Core Depth(m) : 352.00 Rock Type: IGNEOUS
Core: 39 Sample Midpoint(m) : 353.38 Sect/Pc #: 1/PCE 12A
ROCK = PLAG-OL MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,SUBOPHITIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( TR%)
Size(mm): 1
PLAGIOCLASE ( 2%)
Size(mm): 3
APPROX COMP AN64*
Groundmass - OLIVINE ( 0%)
PLAGIOCLASE ( 35%)
Size(mm): 0.5
CLINOPYROXENE ( 26%)
OPAQUE MINERALS ( 7%)
INCLUDES MAGN + ILMENITE*
Alteration - CLAY MINERALS ( 2%)
Location: VESICLES Replacing: PLAG,CPX
PERCENTAGE IS UNCERTAIN BUT SLIGHT;
CALCITE
Location: VESICLES
Vesicles -
Size(mm): 0.4-1.6
Percent: 30
Filling: CALCITE,
Shape: IRREGULAR
Filling: CLAY.MIN
MOSTLY FILLED WITH CALCITE,CLAY IS GREEN*
Leg : 59 Top/Bottom Interval(mm): 360/ 380 Describer: Scott, R.
Hole: 448 Top of Core Depth(m) : 352.00 Rock Type: IGNEOUS
Core: 39 Sample Midpoint(m) : 353.87 Sect/Pc #: 2/PCE 2D
ROCK = PLAG SPARSELY PHYRIC BASALT;
Texture: SPARSELY PORPHYRITIC,HYALOPILITIC-SUBOPHITIC*
Phenocrysts- OLIVINE ( 0%)
PLAGIOCLASE ( 1%)
Size(mm): 1.2 Morphology: BLOCKY
APPROX COMP AN64?,GLOMEROCRYSTS;
CLINOPYROXENE ( 0%)
SPINEL ( 0%)
Groundmass - OLIVINE ( 5%)
Size(mm): 0.2
PLAGIOCLASE ( 35%)
Size(mm): 0.8 Morphology: ACICULAR
APPROX COMP AN67,ZONED;
CLINOPYROXENE ( 10%)
Size(mm): 0.5
OPAQUE MINERALS ( 5%)
Size(mm): 0.02
INCLUDES MAGN + ILMENITE;
GLASS ( 24%)
FINELY CRYSTALLINE PYX + PLAG?*
Alteration - CALCITE ( 1%)
Location: VESICLES
OTHER
GROUNDMASS OXIDIZED SLIGHTLY*
Vesicles -
Size(mm): 0.4-0.8
Percent: 20
Filling: EMPTY,CALCITE
Shape: IRREGULAR
ONLY RARE CALCITE*
Leg : 59 Top/Bottom Interval(mm): 1230/1250 Describer: Scott, R.
Hole: 448 Top of Core Depth(m) : 375.50 Rock Type: IGNEOUS
Core: 43 Sample Midpoint(m) : 376.74 Sect/Pc #: 1/PCE 8D
ROCK = APHYRIC BASALT;
Texture: APHYRIC,HYALOPILITIC
GLASS MATRIX;
Where sampled: FLOW INTERIOR
FLOW BANDING IS SHOWN BY ALIGNED VESICLES WITH
GLASS RIMS AND SOME ZEOLITE FILLING*
Groundmass - OLIVINE ( 0%)
PLAGIOCLASE ( 50%)
Size(mm): 0.3
CLINOPYROXENE ( 10%)
Size(mm): 0.1
OPAQUE MINERALS ( 5%)
INCLUDES MAGN + ILMENITE;
GLASS ( 25%)
OXIDIZED TO OPAQUE BROWN*
Alteration - ZEOLITE
Location: VESICLES,
Location: VEINS
OTHER
EXTENSIVE OXIDATION,GLASS OXIDIZED OPAQUE BROWN*
Vesicles -
Size(mm): 0.2-0.6
Percent: 5
Filling: EMPTY
Size(mm): 1-8
Percent: K
Filling: GLASS,ZEOLITES
Shape: IRREGULAR
RIMMED WITH GLASS + ZEOLITES*
Leg : 59 Top/Bottom Interval(mm): 1000/1030 Describer: Scott, R.
Hole: 448 Top of Core Depth(m) : 385.00 Rock Type: IGNEOUS
Core: 44 Sample Midpoint(m) : 386.02 Sect/Pc #: 1/PCE 8G
ROCK = PLAG-OL-CPX MODERATELY PHYRIC BASALT;
Texture: MODERATELY PORPHYRITIC,SUBOPHITIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 2%)
Size(mm): 0.4
PLAGIOCLASE ( 2%)
Size(mm): 1.5 Morphology: BLOCKY
CLINOPYROXENE ( 1%)
Size(mm): 0.4
Groundmass - OLIVINE ( 5%)
Size(mm): 0.2 Morphology: EQUANT
PLAGIOCLASE ( 40%)
Size(mm): 0.04-0.2 Morphology: THIN BLADES
OPAQUE MINERALS ( 12%)
INCLUDES MAGN + ILMENITE;
GLASS ( 20%)
FINELY CRYSTALLINE CPX + PLAG + GLASS?*
Alteration - ZEOLITE
Location: VEINS,
Location: VESICLES
CENTER OF VEINS IS CARBONATE--VEINS LINED WITH
ZEOLITES;
CARBONATE
Location: VEINS
CENTER OF VEINS IS CARBONATE--VEINS LINED WITH
ZEOLITES;
OTHER
OXIDE DISCOLORATION*
Vesicles -
Size(mm): 0.5-3.5
Percent: 2
Filling: ZEOLITES OR
Shape: SPHERICAL
Filling: EMPTY
Size(mm): 0.2-0.6
Percent: 15
Filling: EMPTY
Shape: IRREGULAR
Leg : 59 Top/Bottom Interval(mm): 940/ 970 Describer: Scott, R.
Hole: 448 Top of Core Depth(m) : 404.00 Rock Type: IGNEOUS
Core: 46 Sample Midpoint(m) : 404.96 Sect/Pc #: 1/PCE 5C
ROCK = PLAG SPARSELY PHYRIC BASALT;
Texture: SPARSELY PORPHYRITIC,HYALOPILITIC;
Where sampled: PILLOW INTERIOR
5 CM FROM PILLOW MARGIN*
Phenocrysts- OLIVINE ( 0%)
PLAGIOCLASE ( 1%)
Size(mm): 0.5
NO CORRECT ALIGNMENT FOR AN;
CLINOPYROXENE ( 0%)
Groundmass - OLIVINE ( 0%)
PLAGIOCLASE ( 50%)
Size(mm): 0.2
CLINOPYROXENE ( 5%)
OPAQUE MINERALS ( 3%)
INCLUDES MAGN + ILMENITE;
GLASS ( 26%)
Alteration - ZEOLITE
Location: VESICLES
OTHER
SLIGHT OXIDATION*
Vesicles -
Size(mm): 0.5-2
Percent: 10
Filling: ZEOLITES
Shape: SPHERICAL
SOME ANALCITE;
Size(mm): 0.05-0.1
Percent: 5
Filling: ZEOLITES
Shape: IRREGULAR
Leg : 59 Top/Bottom Interval(mm): 370/ 400 Describer: Ishi, T.
Hole: 448 Top of Core Depth(m) : 413.50 Rock Type: IGNEOUS
Core: 47 Sample Midpoint(m) : 415.39 Sect/Pc #: 2/PCE 5
ROCK = APHYRIC BASALT;
Texture: APHYRIC,INTERSERTAL,FINE GRAINED GROUNDMASS;
Where sampled: FLOW INTERIOR*
Groundmass - PLAGIOCLASE ( 30%)
Morphology: LATHS,EUHEDRAL-SUBHEDRAL
APPROX COMP AN52;
CLINOPYROXENE ( 20%)
Morphology: SUBHEDRAL
OPAQUE MINERALS ( 4%)
INCLUDES MAGN + ILMENITE;
GLASS ( 16%)
Alteration - CLAY MINERALS ( RARE%)
Replacing: GLASS
Vesicles -
Size(mm): 0.2-2
Percent: 30
Shape: IRREGULAR
Leg : 59 Top/Bottom Interval(mm): 970/ 990 Describer: Scott, R.
Hole: 448 Top of Core Depth(m) : 423.00 Rock Type: IGNEOUS
Core: 48 Sample Midpoint(m) : 425.48 Sect/Pc #: 2/PCE 7
ROCK = APHYRIC BASALT;
Texture: APHYRIC,PILOTAXITIC-OPHITIC*
Groundmass - OLIVINE ( 0%)
PLAGIOCLASE ( 40%)
Size(mm): 0.2
CLINOPYROXENE ( 5%)
Size(mm): 0.1
OPAQUE MINERALS ( 5%)
INCLUDES MAGN + ILMENITE;
GLASS ( 30%)
OXIDIZED*
Alteration - OTHER
GLASS IS OXIDIZED*
Vesicles -
Size(mm): 1-6
Percent: 10
Filling: EMPTY,CLAY.MIN,
Shape: IRREGULAR
Filling: ZEOLITES
VESICLES ARE EMPTY WITH SOME CLAYS + ZEOLITES ON
MARGINS;
Size(mm): 0.1-0.4
Percent: 10
Filling: EMPTY,CLAY.MIN,
Filling: ZEOLITES
VESICLES ARE EMPTY WITH SOME CLAYS + ZEOLITES ON
MARGINS*
Leg : 59 Top/Bottom Interval(mm): 680/ 720 Describer: Scott, R.
Hole: 448 Top of Core Depth(m) : 423.00 Rock Type: IGNEOUS
Core: 48 Sample Midpoint(m) : 426.70 Sect/Pc #: 3/PCE 5C
ROCK = APHYRIC BASALT;
Texture: APHYRIC,PILOTAXITIC;
Where sampled: FLOW INTERIOR
CENTER OF FLOW,FLOW BANDING CROSSES CORE AT 45
DEGREES,SMALL VESICLES ALIGNED IN CHAINS PARALLEL
TO FLOW BANDING*
Phenocrysts- OLIVINE ( TR%)
Size(mm): 0.2
PLAGIOCLASE ( TR%)
Size(mm): 0.4
CLINOPYROXENE ( TR%)
Size(mm): 0.3
Groundmass - OLIVINE ( 0%)
PLAGIOCLASE ( 40%)
CLINOPYROXENE ( 10%)
OPAQUE MINERALS ( 5%)
INCLUDES MAGN + ILMENITE;
GLASS ( 17%)
TOO FINE TO IDENTIFY*
Alteration - CLAY MINERALS
Location: GROUNDMASS Replacing: GROUNDMASS
Vesicles -
Size(mm): 20-40
Percent: 8
Filling: EMPTY
Shape: SPHERICAL
Size(mm): 0.2
Percent: 20
Filling: EMPTY
Shape: IRREGULAR
Leg : 59 Top/Bottom Interval(mm): 1100/1130 Describer: Scott, R.
Hole: 448 Top of Core Depth(m) : 423.00 Rock Type: UNIDENTIFIED
Core: 48 Sample Midpoint(m) : 428.62 Sect/Pc #: 4/PCE 1K
ROCK = VOLCANICLASTIC BRECCIA
CLASTS ARE PLAG-CPX-OL PHYRIC BASALTS AND
BASALTIC PUMICE CEMENTED IN A MATRIX OF ZEOLITES
AND SOME CARBONATE;
Phenocrysts- PLAGIOCLASE
CLINOPYROXENE
OLIVINE
Alteration - CALCITE
Location: MATRIX
BRECCIA CEMENTED BY ZEOLITES + SOME CALCITE;
ZEOLITE
Location: MATRIX
BRECCIA CEMENTED BY ZEOLITES + SOME CALCITE*
Leg : 59 Top/Bottom Interval(mm): 750/ 800 Describer: Scott, R.
Hole: 448 Top of Core Depth(m) : 442.00 Rock Type: UNIDENTIFIED
Core: 50 Sample Midpoint(m) : 442.78 Sect/Pc #: 1/PCE 1I
ROCK = VOLCANICLASTIC BRECCIA
CLASTS ARE PLAG-CPX-OL PHYRIC BASALTS AND
BASALTIC PUMICE CEMENTED IN A MATRIX OF ZEOLITES
(PHILLIPSITE?);
Phenocrysts- PLAGIOCLASE
OLIVINE
CLINOPYROXENE
Alteration - ZEOLITE
CLASTS ARE CEMENTED TOGETHER BY ZEOLITES
(PHILLIPSITE?)*
Leg : 59 Top/Bottom Interval(mm): 800/ 820 Describer: Scott, R.
Hole: 448 Top of Core Depth(m) : 442.00 Rock Type: UNIDENTIFIED
Core: 50 Sample Midpoint(m) : 445.81 Sect/Pc #: 3/PCE 10
ROCK = GRANODIORITE-QUARTZ DIORITE
THIS IS A CLAST FROM VOLCANICLASTIC BRECCIA;
Texture: GRANITIC,MICROGRAPHIC;
Where sampled: CLAST IN VOLCANICLASTIC BRECCIA FROM A BATHOLITH*
Groundmass - OLIVINE ( 0%)
PLAGIOCLASE ( 55%)
Size(mm): 1
APPROX COMP AN49-45(CORE)-AN38(CENTRAL)-AN38-24
(THIN RIM);
CLINOPYROXENE ( TR%)
PARTLY ALTERED TO HORNBLENDE;
OPAQUE MINERALS ( 5%)
INCLUDES MAGN + ILMENITE;
GLASS ( 0%)
ORTHOPYROXENE ( TR%)
ALTERATION RIM TO HORNBLENDE;
QUARTZ ( 15%)
Size(mm): 2
ALKALI FELDSPAR ( 5%)
IDENTITY UNCERTAIN,GRAPHIC AND MYRMEKITIC
INTERGROWTHS WITH QUARTZ;
APATITE ( 1%)
HORNBLENDE ( 20%)
Size(mm): 1
PLUS A CLEAR AMPHIBOLE? = TREMOLITE*
Alteration - HORNBLENDE
Replacing: CPX,OPX
CPX ALTERED IN PART AND RIMS OF OPX ARE ALTERED
TO HORNBLENDE*
Leg : 59 Top/Bottom Interval(mm): 380/ 400 Describer: Scott, R.
Hole: 448 Top of Core Depth(m) : 451.50 Rock Type: UNIDENTIFIED
Core: 51 Sample Midpoint(m) : 451.89 Sect/Pc #: 1/PCE 1E
ROCK = PLAG MODERATELY PHYRIC ANDESITE
NOT CERTAIN IF ANDESITE,A CLAST IN VOLCANICLASTIC
BRECCIA;
Texture: MODERATELY PORPHYRITIC,TRACHYTIC;
Where sampled: FLOW INTERIOR
A CLAST IN VOLCANICLASTIC BRECCIA*
Phenocrysts- OLIVINE ( 0%)
PLAGIOCLASE ( 5%)
Size(mm): 0.5
PERCENTAGE UNCERTAIN,SEVERAL ALTERED PHENOS,
GLOMEROCRYSTS;
CLINOPYROXENE
Size(mm): 1.5
ONE ALTERED XTL;
SPINEL ( 0%)
Groundmass - OLIVINE ( 0%)
PLAGIOCLASE ( 5%)
Size(mm): 0.1
APPROX COMP AN28-36;
GLASS ( 30%)
ALTERED*
Alteration - CALCITE
Location: VESICLES
ZEOLITE
Location: VESICLES
Replacing: PLAG,CPX,GLASS
SEVERAL ALTERED PHENOS OF PLAG AND ONE ALTERED
XTL OF CPX BUT ALTERATION IS NOT SPECIFICALLY
NOTED*
Vesicles -
Size(mm): .05-0.25
Percent: 60
Filling: ZEOLITES,
Shape: SPHERICAL
Filling: CALCITE
Leg : 59 Top/Bottom Interval(mm): 500/ 510 Describer: Scott, R.
Hole: 448 Top of Core Depth(m) : 451.50 Rock Type: TUFF
Core: 51 Sample Midpoint(m) : 455.01 Sect/Pc #: 3/PCE 1I
ROCK = VITRIC TUFF
ALTERED VOLCANIC ASH WITH MN DENORITES;
Leg : 59 Top/Bottom Interval(mm): 580/ 600 Describer: Ishi, T.
Hole: 448 Top of Core Depth(m) : 451.50 Rock Type: TUFF
Core: 51 Sample Midpoint(m) : 455.09 Sect/Pc #: 3/PCE 1J
ROCK = VITRIC TUFF;
Groundmass - PLAGIOCLASE ( 3%)
Size(mm): 0.1
CLINOPYROXENE ( <1%)
Size(mm): 0.08
GLASS
ALTERED VOLCANIC ASH,BROWN GLASS;
ORTHOPYROXENE ( <1%)
Size(mm): 0.4
IDENTITY UNCERTAIN;
OTHER ( 3%)
IDENTITY UNKNOWN*
Leg : 59 Top/Bottom Interval(mm): 290/ 320 Describer: Scott, R.
Hole: 448 Top of Core Depth(m) : 461.00 Rock Type: IGNEOUS
Core: 52 Sample Midpoint(m) : 461.31 Sect/Pc #: 1/PCE 1I
ROCK = APHYRIC BASALT
SECTION IS FRESH;
Texture: APHYRIC,HYALOPILITIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( TR%)
Size(mm): 0.6
PLAGIOCLASE ( TR%)
Size(mm): 1.2
Groundmass - OLIVINE ( 5%)
Size(mm): 0.1
PLAGIOCLASE ( 40%)
Size(mm): 0.2
CLINOPYROXENE ( 10%)
Size(mm): 0.1
OPAQUE MINERALS ( 5%)
Morphology: ACICULAR,SKELETAL
INCLUDES MAGN + ILMENITE;
GLASS ( 15%)
Vesicles -
Size(mm): 0.1-0.4
Percent: 15
Filling: EMPTY
Shape: IRREGULAR
Size(mm): 0.5-2
Percent: 10
Filling: EMPTY
Shape: SPHERICAL
Leg : 59 Top/Bottom Interval(mm): 640/ 660 Describer: Scott, R.
Hole: 448 Top of Core Depth(m) : 461.00 Rock Type: IGNEOUS
Core: 52 Sample Midpoint(m) : 463.15 Sect/Pc #: 2/PCE 3F
ROCK = PLAG SPARSELY PHYRIC BASALT;
Texture: SPARSELY PORPHYRITIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 0%)
PLAGIOCLASE ( 1%)
Size(mm): 1
GLOMEROCRYST (3 MM)*
Groundmass - OLIVINE ( 2%)
Size(mm): 0.1
PLAGIOCLASE ( 35%)
Size(mm): 0.2
CLINOPYROXENE ( 23%)
Size(mm): 0.2
OPAQUE MINERALS ( 5%)
INCLUDES MAGN + ILMENITE;
GLASS ( 20%)
Alteration - OTHER
SLIGHT OXIDATION*
Vesicles -
Size(mm): 1
Percent: 2
Filling: ZEOLITES
Shape: SPHERICAL
Size(mm): 0.1-0.3
Percent: 13
Filling: EMPTY
Shape: IRREGULAR
Leg : 59 Top/Bottom Interval(mm): 640/ 660 Describer: Ishi, T.
Hole: 448 Top of Core Depth(m) : 470.50 Rock Type: IGNEOUS
Core: 53 Sample Midpoint(m) : 472.65 Sect/Pc #: 2/PCE 1J
ROCK = PLAG-CPX SPARSELY PHYRIC BASALT;
Texture: SPARSELY PORPHYRITIC,HYALOPILITIC,GROUNDMASS IS
FINE;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( 1%)
Size(mm): 0.4-0.6 Morphology: EUHEDRAL
APPROX COMP AN48
CLINOPYROXENE ( RARE%)
Size(mm): 0.4
Groundmass - PLAGIOCLASE ( 22%)
Morphology: LATHS,EUHEDRAL-SUBHEDRAL
APPROX COMP AN50;
CLINOPYROXENE ( 27%)
Morphology: SUBHEDRAL
OPAQUE MINERALS ( 6%)
INCLUDES MAGN + ILMENITE;
GLASS ( 10%)
Alteration - CLAY MINERALS ( 5%)
Replacing: GLASS
Vesicles -
Size(mm): 0.1-1
Percent: 30
Shape: IRREGULAR,
Shape: SPHERICAL
VESICLES 0.1-0.4 MM ARE IRREGULAR AND VESICLES
0.5-1 MM ARE SPHERICAL*
Leg : 59 Top/Bottom Interval(mm): 1290/1310 Describer: Scott, R.
Hole: 448 Top of Core Depth(m) : 508.50 Rock Type: UNIDENTIFIED
Core: 57 Sample Midpoint(m) : 509.80 Sect/Pc #: 1/PCE 9C
ROCK = PLAG-CPX PHYRIC BASALT
THIN SECTION IS OF A BASALT CLAST IN
VOLCANICLASTIC BRECCIA;
Texture: PORPHYRITIC,HYALOPILITIC-PILOTAXITIC;
Where sampled: FLOW INTERIOR
BASALT CLAST FROM BRECCIA*
Phenocrysts- OLIVINE ( 0%)
PLAGIOCLASE ( 15%)
Size(mm): 1.2
CORES OF PLAG 90% ALTERED TO CELADONITE(?);
CLINOPYROXENE ( 1%)
Size(mm): 0.5
Groundmass - OLIVINE ( 0%)
PLAGIOCLASE ( 50%)
Size(mm): 0.4
THESE ARE FRESH;
CLINOPYROXENE ( 5%)
Size(mm): 0.2
OPAQUE MINERALS ( 3%)
INCLUDES MAGN + ILMENITE;
GLASS ( 25%)
HIGHLY ALTERED TO CELADONITE? OR GREEN SMEC;
COPPER ( 1%)
Size(mm): 0.1-1
NATIVE COPPER ASSOCIATED WITH POCKETS OF
DISSEMINATED OXIDES FROM ALTERED SULFIDES?--25 TO
75% OF POCKET = COPPER*
Alteration - CLAY MINERALS ( 40%)
Replacing: PLAG,GLASS
EXTENSIVE--40% OF SLIDE GREEN=CELADONITE?,CORES
OF PLAG PHENOS AND GLASS IN THE GROUNDMASS ARE
ALTERED*
Vesicles -
Percent: 0
Leg : 59 Top/Bottom Interval(mm): 50/ 80 Describer: Ishi, T.
Hole: 448 Top of Core Depth(m) : 508.50 Rock Type: UNIDENTIFIED
Core: 57 Sample Midpoint(m) : 510.07 Sect/Pc #: 2/PCE 1A
ROCK = CPX-PLAG MODERATELY PHYRIC BASALT
THIN SECTION IS OF A BASALT CLAST IN
VOLCANICLASTIC BRECCIA--THIS DESCRIPTION IS OF
THE CLAST;
Texture: MODERATELY PORPHYRITIC,HYALOPILITIC;
Where sampled: CLAST OF BASALT IN BRECCIA*
Phenocrysts- OLIVINE
PLAGIOCLASE ( 1%)
Size(mm): 0.3-0.7
CLINOPYROXENE ( 2%)
Size(mm): 0.4-1.5 Morphology: SUBHEDRAL
SOME XTLS SHOW HOURGLASS STRUCTURES;
SPINEL
ORTHOPYROXENE ( RARE%)
Size(mm): 0.1-0.4 Morphology: EUHEDRAL-SUBHEDRAL
IDENTITY UNCERTAIN,PSEUDOMORPH*
Groundmass - OLIVINE
PLAGIOCLASE ( 30%)
Size(mm): 0.05-0.2 Morphology: LATHS
APPROX "37& AN66;
CLINOPYROXENE ( 10%)
Size(mm): 0.03-0.2 Morphology: SUBHEDRAL
OPAQUE MINERALS ( 5%)
Size(mm): 0.02-0.1
INCLUDES MAGN + ILMENITE;
GLASS ( 27%)
ORTHOPYROXENE ( R%)
Size(mm): 0.1
IDENTITY UNCERTAIN;
QUARTZ
IDENTITY UNCERTAIN;
ALKALI FELDSPAR
IDENTITY UNCERTAIN;
HORNBLENDE
Alteration - CARBONATE ( 5%)
CLAY MINERALS ( 3%)
ZEOLITE ( 2%)
Vesicles -
Size(mm): 0.5-3
Percent: 15
Leg : 59 Top/Bottom Interval(mm): 50/ 81 Describer: Ishi, T.
Hole: 448 Top of Core Depth(m) : 508.50 Rock Type: UNIDENTIFIED
Core: 57 Sample Midpoint(m) : 510.07 Sect/Pc #: 2/PCE 1A
ROCK = VOLCANICLASTIC BRECCIA MATRIX
THIN SECTION IS OF A BASALT CLAST IN
VOLCANICLASTIC BRECCIA--THIS DESCRIPTION IS OF
THE BRECCIA MATRIX;
Texture: APHANITIC;
Where sampled: BRECCIA MATRIX*
Phenocrysts- OLIVINE ( 0%)
PLAGIOCLASE
CLINOPYROXENE
SPINEL ( 0%)
Groundmass - OLIVINE ( 0%)
PLAGIOCLASE
CLINOPYROXENE
MAGNETITE
ILMENITE
GLASS
ORTHOPYROXENE
Leg : 59 Top/Bottom Interval(mm): 990/1020 Describer: Scott, R.
Hole: 448 Top of Core Depth(m) : 508.50 Rock Type: UNIDENTIFIED
Core: 57 Sample Midpoint(m) : 511.01 Sect/Pc #: 2/PCE 7
ROCK = PLAG-HY-SPINEL PHYRIC ANDESITE
BASALTIC ANDESITE,THIN SECTION IS OF AN ANDESITE
CLAST FOUND IN VOLCANICLASTIC BRECCIA;
Texture: PORPHYRITIC;
Where sampled: ANDESITE CLAST IN VOLCANICLASTIC BRECCIA*
Phenocrysts- PLAGIOCLASE ( 20%)
Size(mm): 1-2.0
APPROX COMP AN76,GLOMEROCRYSTS IN PART;
SPINEL ( 1%)
Size(mm): 0.5-2
CORRODED;
HYPERSTHENE ( 5%)
Size(mm): 0.3-0.5
Groundmass - OLIVINE ( 0%)
PLAGIOCLASE ( 40%)
Size(mm): 0.3
CLINOPYROXENE ( 5%)
Size(mm): 0.1
OPAQUE MINERALS ( 5%)
INCLUDES MAGN + ILMENITE;
GLASS ( 30%)
FINE-GRAINED CRYSTALLITES IN PART,ALTERED TO
GREEN CLAY = CELADONITE?? THROUGHOUT ROCK*
Alteration - CLAY MINERALS ( >30%)
Replacing: GLASS
GLASS ALTERED TO CELADONITE? OR OTHER GREEN CLAY*
Leg : 59 Top/Bottom Interval(mm): 180/ 210 Describer: Ishi, T.
Hole: 448 Top of Core Depth(m) : 518.00 Rock Type: IGNEOUS
Core: 58 Sample Midpoint(m) : 522.70 Sect/Pc #: 4/PCE 1C
ROCK = PLAG-CPX-OPX PHYRIC BASALT;
Texture: PORPHYRITIC,HYALOPILITIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( 10%)
Size(mm): 0.4-3.0
APPROX COMP AN64,FRESH;
CLINOPYROXENE ( 2%)
Size(mm): 0.4-1.0 Morphology: SUBHEDRAL
FRESH;
ORTHOPYROXENE ( <1%)
Size(mm): 0.4-0.7 Morphology: SUBHEDRAL
FRESH,2V = -*
Groundmass - PLAGIOCLASE ( 20%)
Size(mm): 0.05-0.4 Morphology: LATHS,EUHEDRAL
APPROX COMP AN60;
CLINOPYROXENE ( 12%)
Size(mm): 0.05-0.3 Morphology: SUBHEDRAL
OPAQUE MINERALS ( 4%)
Size(mm): 0.01-0.05
INCLUDES MAGN + ILMENITE;
GLASS ( 10%)
ORTHOPYROXENE ( 1%)
Size(mm): 0.2-0.4 Morphology: SUBHEDRAL
FRESH,MICROPHENOCRYSTS?*
Alteration - OTHER ( 5%)
Vesicles -
Size(mm): 0.4-5.0
Percent: 35
Leg : 59 Top/Bottom Interval(mm): 440/ 470 Describer: Ishi, T.
Hole: 448 Top of Core Depth(m) : 518.00 Rock Type: IGNEOUS
Core: 58 Sample Midpoint(m) : 524.46 Sect/Pc #: 5/PCE 3F
ROCK = PLAG-CPX PHYRIC BASALT;
Texture: PORPHYRITIC,HYALO-OPHITIC,GROUNDMASS IS FINE;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( 15%)
Size(mm): 0.4-3.6 Morphology: EUHEDRAL-SUBHEDRAL
APPROX COMP AN60;
CLINOPYROXENE ( 1%)
Size(mm): 0.4-7.0 Morphology: SUBHEDRAL
2VZ = 50,GABBROIC INCLUSION;
ORTHOPYROXENE ( RARE%)
Size(mm): TO 0.5
IDENTITY UNCERTAIN*
Groundmass - PLAGIOCLASE ( 20%)
Morphology: LATHS,SUBHEDRAL
APPROX COMP AN46;
CLINOPYROXENE ( 10%)
OPAQUE MINERALS ( 5%)
INCLUDES MAGN + ILMENITE;
GLASS ( 10%)
ORTHOPYROXENE ( RARE%)
Size(mm): 0.3 Morphology: SUBHEDRAL
PSEUDOMORPH*
Alteration - CARBONATE ( 1%)
Location: VESICLES
CLAY MINERALS ( 6%)
Replacing: GLASS
ZEOLITE ( 2%)
Location: VESICLES
Vesicles -
Size(mm): 5.0
Percent: 30
Filling: CARB,ZEOLITES
Leg : 59 Top/Bottom Interval(mm): 10/ 40 Describer: Ishi, T.
Hole: 448 Top of Core Depth(m) : 527.50 Rock Type: IGNEOUS
Core: 59 Sample Midpoint(m) : 527.53 Sect/Pc #: 1/PCE 1A
ROCK = PLAG-CPX PHYRIC BASALT;
Texture: PORPHYRITIC,HYALO-OPHITIC,GROUNDMASS IS FINE;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( 15%)
Size(mm): 0.4-3.0 Morphology: EUHEDRAL-SUBHEDRAL
APPROX COMP AN68;
CLINOPYROXENE ( 2%)
Size(mm): 0.4-1.0 Morphology: SUBHEDRAL
ORTHOPYROXENE ( RARE%)
Size(mm): 0.4
IDENTITY UNCERTAIN,PSEUDOMORPH?*
Groundmass - PLAGIOCLASE ( 20%)
Morphology: EUHEDRAL-SUBHEDRAL
APPROX COMP AN50;
CLINOPYROXENE ( 15%)
Morphology: SUBHEDRAL
OPAQUE MINERALS ( 5%)
INCLUDES MAGN + ILMENITE;
GLASS ( 8%)
ORTHOPYROXENE ( R%)
PSEUDOMORPHS*
Alteration - CLAY MINERALS ( 3%)
Replacing: GLASS
ZEOLITE ( 2%)
Location: VESICLES
Vesicles -
Size(mm): 0.2-5.0
Percent: 30
Filling: EMPTY,ZEOLITES
Leg : 59 Top/Bottom Interval(mm): 1170/1200 Describer: Ishi, T.
Hole: 448 Top of Core Depth(m) : 527.50 Rock Type: IGNEOUS
Core: 59 Sample Midpoint(m) : 528.69 Sect/Pc #: 1/PCE 3J
ROCK = PLAG-CPX-OPX PHYRIC BASALT;
Texture: PORPHYRITIC,HYALO-OPHITIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( 10%)
Size(mm): 0.4-2.0 Morphology: EUHEDRAL-SUBHEDRAL
APPROX COMP AN60;
CLINOPYROXENE ( 2 %)
Size(mm): 0.4-1.5S Morphology: UBHEDRAL
ORTHOPYROXENE ( 1%)
Size(mm): 0.5-2.6
PSEUDOMORPHED AND FRESH (2VX = 70)*
Groundmass - PLAGIOCLASE ( 20%)
Size(mm): 0.05-0.1 Morphology: LATHS,SUBHEDRAL
APPROX COMP AN50;
CLINOPYROXENE ( 15%)
Size(mm): 0.05-0.1 Morphology: SUBHEDRAL
OPAQUE MINERALS ( 6%)
Size(mm): 0.01-0.05
INCLUDES MAGN + ILMENITE;
GLASS ( 10%)
ORTHOPYROXENE ( 1%)
Size(mm): 0.03-0.3 Morphology: SUBHEDRAL
FRESH ONE AND PSEUDOMORPHS*
Alteration - CARBONATE
CLAY MINERALS ( 5%)
Replacing: GLASS
ZEOLITE ( 1%)
Location: VESICLES
Vesicles -
Size(mm): 0.3-3
Percent: 30
Filling: EMPTY,ZEOLITES
Shape: IRREGULAR
Leg : 59 Top/Bottom Interval(mm): 520/ 550 Describer: Ishi, T.
Hole: 448 Top of Core Depth(m) : 527.50 Rock Type: IGNEOUS
Core: 59 Sample Midpoint(m) : 529.53 Sect/Pc #: 2/PCE 2G
ROCK = PLAG-CPX-OPX PHYRIC BASALT
ISLAND ARC TYPE THOLEIITIC BASALT (ANDESITE?);
Texture: PORPHYRITIC,HYALO-OPHITIC;
Where sampled: PILLOW INTERIOR OR FLOW INTERIOR*
Phenocrysts- OLIVINE ( 0%)
PLAGIOCLASE ( 15%)
DIMENSIONS ARE 2.0 MM X 2.5 MM,APPROX COMP
AN56-57;
CLINOPYROXENE ( 2%)
Size(mm): 1.0 Morphology: EUHEDRAL-SUBHEDRAL
SPINEL ( 0%)
ORTHOPYROXENE ( <1%)
Morphology: EUHEDRAL-SUBHEDRAL
DIMENSIONS ARE 0.6 MM X 0.7 MM*
Groundmass - OLIVINE ( 0%)
PLAGIOCLASE ( 45%)
Size(mm): 0.2-0.4
APPROX COMP AN38;
CLINOPYROXENE ( 3%)
Size(mm): 0.1-0.2
AUGITE AND PIGEONITE(?);
OPAQUE MINERALS ( 7%)
INCLUDES MAGN + ILMENITE;
GLASS ( 25%)
BROWN GLASSES;
ORTHOPYROXENE ( 2%)
Size(mm): 0.2 Morphology: EUHEDRAL-SUBHEDRAL
RARELY WITH A CPX RIM;
QUARTZ ( 0%)
ALKALI FELDSPAR ( 0%)
Alteration - CLAY MINERALS ( 5%)
Location: VESICLES,VEIN
BROWNISH-GREEN*
Vesicles -
Percent: 15
Shape: SPHERICAL
Leg : 59 Top/Bottom Interval(mm): 460/ 500 Describer: Ishi, T.
Hole: 448 Top of Core Depth(m) : 546.50 Rock Type: IGNEOUS
Core: 61 Sample Midpoint(m) : 548.48 Sect/Pc #: 2/PCE 1G
ROCK = PLAG-CPX-OPX PHYRIC BASALT
ISLAND ARC TYPE THOLEIITIC BASALT (ANDESITE?);
Texture: PORPHYRITIC,HYALO-OPHITIC;
Where sampled: PILLOW INTERIOR OR FLOW INTERIOR*
Phenocrysts- OLIVINE ( 0%)
PLAGIOCLASE ( 15%)
Size(mm): 0.7-2.0
APPROX COMP AN58;
CLINOPYROXENE ( 2%)
Size(mm): 0.3-1.0 Morphology: SUBHEDRAL
SPINEL ( 0%)
ORTHOPYROXENE ( 1%)
Size(mm): 0.5-0.7 Morphology: SUBHEDRAL
PSEUDOMORPHED BUT NOT BY OL,2VX = 80*
Groundmass - PLAGIOCLASE ( 40%)
Size(mm): 0.1-0.3
APPROX COMP AN36;
CLINOPYROXENE ( 10%)
Size(mm): 0.05-0.3
OPAQUE MINERALS ( 3%)
Size(mm): 0.03-0.1
INCLUDES MAGN + ILMENITE;
GLASS ( 25%)
ORTHOPYROXENE ( <1%)
Size(mm): 0.3 Morphology: SUBHEDRAL
NO CPX RIMS*
Alteration - CARBONATE ( 3%)
Location: CAVITY Replacing: PLAG
REPLACING SOME PLAG;
CLAY MINERALS ( 1%)
Vesicles -
Percent: 15
Leg : 59 Top/Bottom Interval(mm): 510/ 540 Describer: Zakariakze, G.
Hole: 448 Top of Core Depth(m) : 546.50 Rock Type: IGNEOUS
Core: 61 Sample Midpoint(m) : 550.03 Sect/Pc #: 3/PCE 3A
ROCK = PLAG-CPX-OPX PHYRIC BASALT
ISLAND ARC TYPE THOLEIITE;
Texture: PORPHYRITIC,INTERSERTAL-SUBOPHITIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 0%)
PLAGIOCLASE ( 10%)
Size(mm): 1-1.5 Morphology: SUBHEDRAL,TABULAR,PRISMATIC
APPROX COMP AN72-75;
CLINOPYROXENE ( 1-2%)
Size(mm): 0.5
ORTHOPYROXENE ( 0.5%)
Size(mm): 0.5 Morphology: ELONGATE PROSMS
PERCENTAGE UNCERTAIN*
Groundmass - OLIVINE ( 4%)
Size(mm): 0.5 Morphology: ELONGATE PROSMS
PSEUDOMORPHS;
PLAGIOCLASE ( 40%)
Morphology: ELONGATE LATHS
0.25 MM AVERAGE,APPROX COMP AN68;
CLINOPYROXENE ( 20%)
Morphology: ANHEDRAL GRAINS
0.2 MM AVERAGE;
OPAQUE MINERALS ( 5%)
Size(mm): 0.05 Morphology: TRIANGULAR + SQUARE SECTIONS
GLASS (20-22%)
COMPLETELY ALTERED*
Alteration - COMBINATION
Replacing: PLAG,GLASS,OPX,OL
INCLUDES CELADONITE + SMECTITE*
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