Leg : 82 Top/Bottom Interval(mm): 800/ 0 Describer: Christie, D.M.
Hole: 556 Top of Core Depth(m) : 461.50 Rock Type: IGNEOUS
Core: 2 Sample Midpoint(m) : 462.30 Sect/Pc #: 1/PCE 4E
ROCK = APHYRIC BASALT;
Texture: APHYRIC,INTERGRANULAR;
Where sampled: CLAST IN BRECCIA*
Vesicles -
Size(mm): .5-1
Percent: 1
Filling: CARBONATE
Shape: ROUND
Leg : 82 Top/Bottom Interval(mm): 1450/ 0 Describer: Christie, D.M.
Hole: 556 Top of Core Depth(m) : 461.50 Rock Type: IGNEOUS
Core: 2 Sample Midpoint(m) : 464.45 Sect/Pc #: 2/PCE 9B
ROCK = PLAG SPARSELY PHYRIC BASALT;
Texture: SPARSELY PHYRIC,INTERSERTAL;
Where sampled: CLAST IN BRECCIA*
Phenocrysts- PLAGIOCLASE ( <2%)
Size(mm): 5 Morphology: PRISMATIC
RARE GLOMEROCRYSTS*
Groundmass - OLIVINE ( 5%)
Size(mm): .1-.2 Morphology: GRANULAR
90% ALTERED TO LIGHT BROWN CLAY;
PLAGIOCLASE ( 30%)
Size(mm): .1-.6 Morphology: LATHS
RANDOMLY ORIENTED;
CLINOPYROXENE ( 40%)
Size(mm): .01-.05 Morphology: GRANULAR,INTERSTITIAL
MAGNETITE ( 3%)
Size(mm): .02 Morphology: GRANULAR
DARK BROWN;
MESOSTASIS ( 15%)
Alteration - CLAY MINERALS ( 5%)
Location: INTERSTITIAL Replacing: OL
LIGHT BROWN*
Vesicles -
Size(mm): .5
Percent: TR
Filling: CARBONATE
Leg : 82 Top/Bottom Interval(mm): 80/ 0 Describer: Christie, D.M.
Hole: 556 Top of Core Depth(m) : 461.50 Rock Type: IGNEOUS
Core: 2 Sample Midpoint(m) : 467.58 Sect/Pc #: 5/PCE 1A
ROCK = PLAG MODERATELY PHYRIC BASALT;
Texture: MODERATELY PHYRIC,INTERGRANULAR;
Where sampled: CLAST IN BRECCIA*
Phenocrysts- PLAGIOCLASE ( 2-3%)
Size(mm): .5-4.4 Morphology: PRISMATIC-GLOMEROPHYRIC
APPROX COMP AN68,FRACTURED,FE-OXIDE ALONG
FRACTURE*
Groundmass - OLIVINE ( 20%)
Size(mm): .5 Morphology: ROUND-INTERSTITIAL
85% ALTERED TO GREEN-BROWN CLAY;
PLAGIOCLASE ( 30%)
Size(mm): .2-.8 Morphology: LATHS
APPROX COMP AN38-46,RANDOMLY ORIENTED;
CLINOPYROXENE ( 40%)
Size(mm): 1.5 Morphology: GRANULAR,ROUNDED TO SHEAF-
Morphology: LIKE AGGREGATES
MAGNETITE ( 5%)
Size(mm): .4
Alteration - CARBONATE ( 1%)
Location: INTERSTITIAL Replacing: MESOSTASIS
INCLUDES CALCITE*
Vesicles -
Size(mm): .8
Percent: <1
Filling: CLAY
Shape: ROUND
Leg : 82 Top/Bottom Interval(mm): 630/ 0 Describer: Brannon, J.
Hole: 556 Top of Core Depth(m) : 471.00 Rock Type: IGNEOUS
Core: 3 Sample Midpoint(m) : 471.63 Sect/Pc #: 1/PCE 7
ROCK = PLAG-OL MODERATELY PHYRIC BASALT;
Texture: MODERATELY PHYRIC,HYALOPHITIC;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( TR%)
Size(mm): 1.5 Morphology: SUBHEDRAL
OXIDIZED FRACTURES AND RIMS;
PLAGIOCLASE ( 5-7%)
Size(mm): 1.5-3.0 Morphology: GLOMEROCRYSTS,LATHS
APPROX COMP AN62,HIGHLY FRACTURED,SERICITIZED
INCLUSIONS*
Groundmass - OLIVINE ( 5%)
Size(mm): .2-.6 Morphology: SUBHEDRAL
RIMS ALTERED TO CLAY;
PLAGIOCLASE ( 35%)
Size(mm): .3-.5 Morphology: SKELETAL,SWALLOWTAIL
APPROX COMP AN52;
CLINOPYROXENE ( 35%)
Size(mm): .2-.4 Morphology: GRANULAR,ROUNDED
MESOSTASIS (20-23%)
Alteration - CLAY MINERALS ( 1-3%)
Location: INTERSTITIAL Replacing: GLASS,MESOSTASIS
Vesicles -
Size(mm): .5-1.3
Percent: 1
Location: RANDOM
Filling: CLAY
Shape: ROUND
Leg : 82 Top/Bottom Interval(mm): 300/ 0 Describer: Brannon, J.
Hole: 556 Top of Core Depth(m) : 471.00 Rock Type: IGNEOUS
Core: 3 Sample Midpoint(m) : 472.80 Sect/Pc #: 2/PCE 3A
ROCK = PLAG SPARSELY PHYRIC BASALT;
Texture: SPARSELY PHYRIC,HYALOPHITIC;
Where sampled: PILLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( 2%)
Size(mm): 1.1-3.6 Morphology: ROUNDED,SOME LATHS
SERICITIZED,RESORBED*
Groundmass - OLIVINE ( 3%)
Size(mm): .1-.2 Morphology: ANHEDRAL
ALTERED TO IDDINGSITE;
PLAGIOCLASE ( 30%)
Size(mm): .2 Morphology: LATHS
CLINOPYROXENE ( 30%)
Size(mm): .2-.4 Morphology: ANHEDRAL
DEVITRIFIED GLASS ( 23%)
Alteration - CARBONATE ( 10%)
Location: VEIN Replacing: FRACTURE AND MESOSTASIS
INCLUDES CALCITE;
CHLORITE ( 3%)
Replacing: MESOSTASIS
Vesicles -
Size(mm): .5
Percent: <1
Filling: CLAY
Shape: ROUND
Leg : 82 Top/Bottom Interval(mm): 650/ 0 Describer:
Hole: 556 Top of Core Depth(m) : 471.00 Rock Type: IGNEOUS
Core: 3 Sample Midpoint(m) : 474.65 Sect/Pc #: 3/PCE 7
ROCK = PLAG-OL MODERATELY PHYRIC BASALT;
Texture: MODERATELY PHYRIC,HYALOPILITIC;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( 2%)
Size(mm): .5-1 Morphology: SUBHEDRAL
EXTENSIVELY ALTERED;
PLAGIOCLASE ( 5%)
Size(mm): .7-2 Morphology: SINGULAR-GLOMEROPHYRIC
SLIGHTLY ALTERED*
Groundmass - OLIVINE ( <1%)
Size(mm): .1-.2 Morphology: EQUANT
RARE,ALTERED;
PLAGIOCLASE ( 30%)
Size(mm): .2-.6 Morphology: PRISMATIC
SLIGHTLY ALTERED;
CLINOPYROXENE ( <10%)
Size(mm): .2-.3 Morphology: SUBHEDRAL
MODERATELY ALTERED;
OPAQUE MINERALS ( 1%)
Morphology: EUHEDRAL-SUBHEDRAL
INCLUDES MAGN + ILMENITE,OCCURS WITHIN CLAY
ALTERATION PATTERN;
GLASS ( 50%)
MESOSTASIS*
Alteration - CLAY MINERALS ( 5%)
Location: RIMS,CRACKS Replacing: OL,CPX
OL PHENOS HIGHLY ALTERED,OL-CPX GROUNDMASS
SLIGHTLY ALTERED*
Leg : 82 Top/Bottom Interval(mm): 800/ 0 Describer: Neuser, R.
Hole: 556 Top of Core Depth(m) : 480.00 Rock Type: IGNEOUS
Core: 4 Sample Midpoint(m) : 482.30 Sect/Pc #: 2/
ROCK = PLAG-OL PHYRIC BASALT;
Texture: PORPHYRIC-VITROPHYRIC,(IMMATURE SHEAF);
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( 1%)
Size(mm): 1 Morphology: EUHEDRAL
MOSTLY ALTERED TO SERPENTINITE;
PLAGIOCLASE ( 10%)
Size(mm): .5-7 Morphology: EUHEDRAL
TWINNED,LIQUID INCLUSIONS*
Groundmass - OLIVINE ( 2%)
Size(mm): <.3 Morphology: EUHEDRAL
MOSTLY ALTERED TO SERPENTINITE;
PLAGIOCLASE ( 40%)
Size(mm): 1 Morphology: EUHEDRAL NEEDLES
TWINNED;
OTHER ( 45%)
INCLUDES CPX,DEVT.GLASS + ORE MINERALS(OPAQUES-
MAGN + ILMENITE)*
Alteration - CARBONATE
Location: EDGE OF SLIDE
VEIN;
CLAY MINERALS
Replacing: OL
Vesicles -
Size(mm): 1
Percent: TR
Filling: SMECTITE
Shape: ROUND
SEGREGATION VESICLES,RARE*
Leg : 82 Top/Bottom Interval(mm): 1130/ 0 Describer: Neuser, R.
Hole: 556 Top of Core Depth(m) : 480.00 Rock Type: IGNEOUS
Core: 4 Sample Midpoint(m) : 485.63 Sect/Pc #: 4/
ROCK = PLAG-OL MODERATELY PHYRIC BASALT;
Texture: MODERATELY PHYRIC,TACHYLITIC,VITROPHYRIC,
GLOMEROPHYRIC;
Where sampled: GLASSY MARGIN-NEXT TO GLASSY MARGIN*
Phenocrysts- OLIVINE ( 2-3%)
Morphology: DIAMOND SHAPE
MICROPHENOS;
PLAGIOCLASE ( 5%)
Size(mm): 1-5 Morphology: EUHEDRAL,ROUND
Groundmass - OLIVINE ( <1%)
Size(mm): .25
PLAGIOCLASE (15-20%)
Size(mm): <.8 Morphology: EUHEDRAL,SWALLOWTAILS
TWINNED NEEDLES;
CLINOPYROXENE ( 1-2%)
Size(mm): .08-.7 Morphology: EUHEDRAL
ALTERED;
SPINEL ( TR%)
Size(mm): <.05 Morphology: ANHEDRAL
IN OL MICROPHENOS*
Alteration - CLAY MINERALS
Location: GLASSY MARGIN Replacing: GLASS
FRACTURE FILLING*
Vesicles -
Size(mm): 1.4
Percent: <1
Filling: NONE
Shape: ROUND
Leg : 82 Top/Bottom Interval(mm): 320/ 0 Describer: Neuser, R.
Hole: 556 Top of Core Depth(m) : 480.00 Rock Type: IGNEOUS
Core: 4 Sample Midpoint(m) : 486.32 Sect/Pc #: 5/
ROCK = PLAG MODERATELY PHYRIC BASALT;
Texture: MODERATELY PHYRIC,TACHYLITIC,VITROPHYRIC,
GLOMEROPHYRIC;
Where sampled: PILLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( 3-5%)
Size(mm): <3 Morphology: EUHEDRAL,HYPIDIOMORPHIC
TWINNED,ZONED,LIQUID INCLUSIONS,PARTLY CORRODED*
Groundmass - OLIVINE
Size(mm): <.75 Morphology: EUHEDRAL
PARTLY ALTERED TO SMECTITE;
PLAGIOCLASE ( 35%)
Size(mm): <1 Morphology: LATHS
TWINNED,ZONED;
CLINOPYROXENE ( 2%)
Morphology: DOTS,LATHS
VERY SMALL;
OTHER ( 55%)
DOTS OF ORE IN GROUNDMASS,INCLUDES MAGN,ILMENITE+
DEVT.GLASS*
Alteration - CLAY MINERALS
Replacing: OL
Vesicles -
Size(mm): .5
Percent: <1
Filling: CLAY MINERALS
Shape: MODERATELY
Shape: ROUND
FILLING IS ZONED*
Leg : 82 Top/Bottom Interval(mm): 750/ 0 Describer: Neuser, R.
Hole: 556 Top of Core Depth(m) : 489.00 Rock Type: IGNEOUS
Core: 5 Sample Midpoint(m) : 489.75 Sect/Pc #: 1/
ROCK = PLAG-OL PHYRIC BASALT;
Texture: PHYRIC,GLOMEROPHYRIC,INTERGRANULAR,INTERSERTAL;
Where sampled: PILLOW INTERIOR*
Phenocrysts- OLIVINE ( <1%)
Size(mm): 1.9 Morphology: EUHEDRAL
SIZE RANGE IS UP TO 1.9MM,PARTLY ALTERED;
PLAGIOCLASE ( 10%)
Size(mm): <6.5 Morphology: ANHEDRAL
RESORBED,TWINNED,ZONED,LIQUID INCLUSIONS*
Groundmass - PLAGIOCLASE ( 50%)
Size(mm): <.4 Morphology: FELTY LATHS
ZONED;
CLINOPYROXENE ( 40%)
Size(mm): <.2 Morphology: ANHEDRAL,ROUND+LATHS
PARTLY ALTERED TO SMECTITE;
OTHER ( 10%)
INTERSTITIAL BASE(MESOSTASIS) OF ROCK,INCLUDES
MAGN,ILMENITE+GLASS*
Alteration - CLAY MINERALS
Replacing: OL+CPX
Leg : 82 Top/Bottom Interval(mm): 700/ 0 Describer: Neuser, R.
Hole: 556 Top of Core Depth(m) : 489.00 Rock Type: IGNEOUS
Core: 5 Sample Midpoint(m) : 491.20 Sect/Pc #: 2/
ROCK = OL-PLAG PHYRIC BASALT;
Texture: PHYRIC,HYALOPHITIC;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- OLIVINE ( 7%)
Size(mm): <4 Morphology: EUHEDRAL,SKELETAL
ALTERED;
PLAGIOCLASE ( 5%)
Size(mm): <5 Morphology: MOST EUHEDRAL,PARTLY ROUNDED
TWINNED,ZONED,PARTLY RESORBED*
Groundmass - OLIVINE ( 1%)
Size(mm): <.4 Morphology: MOSTLY EUHEDRAL
PARTLY ALTERED TO SMECTITE;
PLAGIOCLASE ( 35%)
Size(mm): <.6 Morphology: NARROW LATHS,SWALLOWTAILS
TWINNED;
CLINOPYROXENE ( 4%)
Size(mm): .35 Morphology: EUHEDRAL-ANHEDRAL
ALTERATION STARTING FROM CRACKS;
OTHER ( 55%)
INCLUDES MAGN,ILMENITE + GLASS*
Alteration - CLAY MINERALS
Replacing: OL,CPX
Leg : 82 Top/Bottom Interval(mm): 1400/ 0 Describer: Neuser, R.
Hole: 556 Top of Core Depth(m) : 489.00 Rock Type: IGNEOUS
Core: 5 Sample Midpoint(m) : 496.40 Sect/Pc #: 5/
ROCK = PLAG MODERATELY PHYRIC BASALT;
Texture: MODERATELY PHYRIC,INTERGRANULAR,INTERSERTAL
Where sampled: PILLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( 3%)
Size(mm): <4 Morphology: SUBIDIOMORPHIC
TWINNED,LIQUID INCLUSIONS,ZONED*
Groundmass - OLIVINE ( 1%)
Size(mm): <.7 Morphology: EUHEDRAL,ANHEDRAL
MOSTLY ALTERED;
PLAGIOCLASE ( 50%)
Size(mm): <1 Morphology: LATHS
TWINNED;
CLINOPYROXENE ( 30%)
Size(mm): <.2 Morphology: PARTLY ALTERED;
MESOSTASIS ( 15%)
INCLUDES MAGN,ILMENITE + GLASS*
Alteration - CLAY MINERALS
Replacing: OL+CPX
Vesicles -
Size(mm): 1
Percent: 1
Filling: CLAY MINERAL
Shape: ROUND
Filling: SEGREGATION
Leg : 82 Top/Bottom Interval(mm): 650/ 0 Describer: Christie, D.M.
Hole: 556 Top of Core Depth(m) : 498.00 Rock Type: IGNEOUS
Core: 6 Sample Midpoint(m) : 498.65 Sect/Pc #: 1/PCE 3A
ROCK = PLAG-OL SPARSELY PHYRIC BASALT;
Texture: SPARSELY PHYRIC,INTERGRANULAR;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( TR%)
Size(mm): 1 Morphology: PRISMATIC
RARE,ALTERED POSSIBLY TO CLAYS;
PLAGIOCLASE ( 2%)
Size(mm): 1 Morphology: PRISMATIC/GLOMEROPHYRIC
APPROX COMP AN>60*
Groundmass - OLIVINE ( 20%)
Size(mm): <.05
"LANTERN" MICROPHENOS,MOST COMPLETELY ALTERED;
PLAGIOCLASE ( 30%)
Size(mm): <.3 Morphology: SWALLOWTAIL-SKELETAL NEEDLES
CLINOPYROXENE ( 45%)
Size(mm): .005 Morphology: SHEAF-AGGREGATES
INTERSTITIAL TO PLAG;
MAGNETITE ( 5%)
Size(mm): .005 Morphology: GRANULAR
Alteration - CLAY MINERALS ( 15%)
Location: AFTER OL Replacing: OL
Leg : 82 Top/Bottom Interval(mm): 320/ 0 Describer: Weaver, B.
Hole: 556 Top of Core Depth(m) : 498.00 Rock Type: IGNEOUS
Core: 6 Sample Midpoint(m) : 499.82 Sect/Pc #: 2/PCE 2A
ROCK = PLAG-OL MODERATELY PHYRIC BASALT;
Texture: MODERATELY PHYRIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( <1%)
Size(mm): 2 Morphology: PRISMATIC(RELICT)
ALTERED POSSIBLY TO CHLORITE/CLAY;
PLAGIOCLASE ( 5%)
Size(mm): 1-3 Morphology: PRISMATIC-GLOMEROPHYRIC
FRACTURED,PARTIALLY RESORBED WITH SODIC RIMS*
Groundmass - OLIVINE ( 5%)
Size(mm): .2-.5
MICROPHENOS AND GROUNDMASS FRESH,UNALTERED;
PLAGIOCLASE ( 45%)
Size(mm): .2-.5 Morphology: RANDOM LATHS
CLINOPYROXENE ( 45%)
Size(mm): .2-.3 Morphology: GRANULAR
MAGNETITE ( 5%)
Size(mm): .1-.2 Morphology: GRANULAR
Alteration - CARBONATE
INCLUDES CALCITE;
CLAY MINERALS ( 5%)
Location: GROUNDMASS + Replacing: OL/PYX-OL
Location: OL PHENOS
Vesicles -
Size(mm): 1-2
Percent: <1
Filling: CLAY
Shape: ROUND
Leg : 82 Top/Bottom Interval(mm): 800/ 0 Describer: Christie, D.M.
Hole: 556 Top of Core Depth(m) : 498.00 Rock Type: IGNEOUS
Core: 6 Sample Midpoint(m) : 501.80 Sect/Pc #: 3/PCE 1D
ROCK = PLAG-OL MODERATELY PHYRIC BASALT;
Texture: MODERATELY PHYRIC,INTERGRANULAR,INTERSERTAL;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( TR%)
Size(mm): 1 Morphology: PRISMATIC
50% ALTERED;
PLAGIOCLASE ( 3%)
Size(mm): 3 Morphology: PRISMATIC,GLOMEROPHYRIC
APPROX COMP AN65-70,NORMALLY ZONED,GLASS
INCLUSIONS*
Groundmass - OLIVINE ( 5%)
Size(mm): .1 Morphology: ROUNDED
APPROX COMP FO75-80,40% ALTERED TO CLAY;
PLAGIOCLASE ( 35%)
Size(mm): <1 Morphology: LATHS
RANDOMLY ORIENTED;
CLINOPYROXENE ( 45%)
Size(mm): <.2
GRANULAR,INTERSTITIAL;
MAGNETITE ( 5%)
Size(mm): <.05
MESOSTASIS ( 5%)
ALTERED*
Alteration - CLAY MINERALS ( 5-10%)
Replacing: OL,MESOSTASIS
Leg : 82 Top/Bottom Interval(mm): 1250/ 0 Describer:
Hole: 556 Top of Core Depth(m) : 498.00 Rock Type: IGNEOUS
Core: 6 Sample Midpoint(m) : 503.75 Sect/Pc #: 4/PCE 5C
ROCK = PLAG MODERATELY PHYRIC BASALT;
Texture: MODERATELY PHYRIC,INTERGRANULAR;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( 2-5%)
Morphology: GLOMEROPHYRIC
HIGHLY ZONED,ALTERED AT EDGES*
Groundmass - OLIVINE ( 5%)
Size(mm): .1-.12 Morphology: ROUNDED
MUCH CLAY ALTERATION;
PLAGIOCLASE ( 35%)
Size(mm): <1 Morphology: LATHS
CLINOPYROXENE ( 40%)
Size(mm): .5 Morphology: LATHS
MANY TEXTURES PRESENT BETWEEN PLAG AND CPX-
OPHITIC,SUBOPHITIC,INTERSERTAL,ETC.;
OPAQUE MINERALS ( <5%)
Size(mm): <.05 Morphology: CUBIC
INCLUDES MAGN + ILMENITE*
Alteration - CLAY MINERALS ( 5%)
Location: CPX,OL EDGES Replacing: CPX,OL
POSSIBLY INCLUDES SERICITE*
Leg : 82 Top/Bottom Interval(mm): 440/ 0 Describer: Christie, D.M.
Hole: 556 Top of Core Depth(m) : 498.00 Rock Type: IGNEOUS
Core: 6 Sample Midpoint(m) : 505.94 Sect/Pc #: 6/PCE 2A
ROCK = PLAG-OL MODERATELY PHYRIC BASALT;
Texture: MODERATELY PHYRIC,INTERGRANULAR;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 2-3%)
Size(mm): <.5 Morphology: DIAMOND
MICROPHENOS,ALTERED TO BROWN CLAY;
PLAGIOCLASE ( 2-3%)
Size(mm): .5 Morphology: LATHS
MICROPHENOS*
Groundmass - OLIVINE ( 10%)
Size(mm): .1 Morphology: GRANULAR
COMPLETELY ALTERED TO BROWN CLAY;
PLAGIOCLASE ( 25%)
Size(mm): .2 Morphology: ACICULAR
RANDOMLY ORIENTED;
CLINOPYROXENE ( 50%)
Size(mm): .01-.5 Morphology: GRANULES+SHEAF AGGREGATES
MAGNETITE ( 5%)
Size(mm): .02
Alteration - CARBONATE ( 1%)
Location: INTERSTITIAL Replacing: INTERSTITIAL MESOSTASIS
CLAY MINERALS ( 5-10%)
Location: INTERSTITIAL Replacing: OL
DARK BROWN*
Leg : 82 Top/Bottom Interval(mm): 1130/ 0 Describer: Brannon, J.
Hole: 556 Top of Core Depth(m) : 507.00 Rock Type: IGNEOUS
Core: 7 Sample Midpoint(m) : 508.13 Sect/Pc #: 1/PCE 5A
ROCK = PLAG SPARSELY-MODERATELY PHYRIC BASALT;
Texture: SPARSELY-MODERATELY PHYRIC,INTERGRANULAR-
SUBOPHITIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( 1-3%)
Size(mm): 1.8-8.6 Morphology: LATHS
APPROX COMP AN68,PARTIALLY RESORBED,FRACTURED,
FE-OXIDE ALONG FRACTURES,INCLUSIONS;
Groundmass - OLIVINE ( 10%)
Size(mm): .2-.4 Morphology: SUBHEDRAL GRANULES
ALTERED TO BROWN CLAY,SOME CORES PROBABLE;
PLAGIOCLASE ( 40%)
Size(mm): .2-.8 Morphology: ACICULAR
CLINOPYROXENE ( 35%)
Size(mm): .2-.4 Morphology: GRANULAR
MAGNETITE ( 5%)
Size(mm): .02 Morphology: CUBES
Alteration - CLAY MINERALS ( 10%)
Replacing: MESOSTASIS AND OL
Leg : 82 Top/Bottom Interval(mm): 170/ 0 Describer: Brannon, J.
Hole: 556 Top of Core Depth(m) : 507.00 Rock Type: IGNEOUS
Core: 7 Sample Midpoint(m) : 510.17 Sect/Pc #: 3/PCE 1B
ROCK = PLAG SPARSELY PHYRIC BASALT;
Texture: SPARSELY PHYRIC,INTERGRANULAR;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( <1%)
Size(mm): 1.2-2.1 Morphology: LATHS
PARTIALLY RESORBED*
Groundmass - OLIVINE ( 10%)
Size(mm): .1-.3 Morphology: SUBHEDRAL
REPLACED BY CLAY;
PLAGIOCLASE ( 35%)
Size(mm): .2-.4 Morphology: ACICULAR
CLINOPYROXENE ( 35%)
Size(mm): .2-.3 Morphology: GRANULAR
MAGNETITE ( 5%)
Size(mm): .05 Morphology: EUHEDRAL
Alteration - CLAY MINERALS ( 15%)
Location: INTERSTITIAL Replacing: OL + MESOSTASIS
Vesicles -
Size(mm): .4-.6
Percent: <1
Filling: CLAY
Shape: ROUND
Leg : 82 Top/Bottom Interval(mm): 1100/ 0 Describer: Christie, D.M.
Hole: 556 Top of Core Depth(m) : 516.00 Rock Type: IGNEOUS
Core: 8 Sample Midpoint(m) : 517.10 Sect/Pc #: 1/PCE 7
ROCK = PLAG-CPX SPARSELY PHYRIC BASALT;
Texture: SPARSELY PHYRIC,INTERSERTAL-INTERGRANULAR;
Where sampled: PILLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( 1%)
Size(mm): 1 Morphology: LATHS
CLINOPYROXENE ( 1%)
Size(mm): 1 Morphology: GRANULAR
PLAG,CPX INTERGROWN AGGREGATES*
Groundmass - OLIVINE ( 3%)
Size(mm): .2 Morphology: PRISMATIC
MICROPHENOS,COMPLETELY ALTERED;
PLAGIOCLASE (30-35%)
Size(mm): .05-.3 Morphology: LATHS
CLINOPYROXENE ( 45%)
Size(mm): .01-.2 Morphology: GRANULAR
FINE PLUMOSE AGGREGATES;
MAGNETITE ( 3%)
MESOSTASIS ( 10%)
Alteration - CARBONATE ( 2-3%)
Location: VESICLES,
Location: INTERSTITIAL
CLAY MINERALS ( 5-10%)
Location: INTERSTITIAL Replacing: OL
Location: OR AFTER OL
Vesicles -
Size(mm): <1
Percent: 1
Filling: DEVT.GLASS,CARB
Shape: ROUND
Leg : 82 Top/Bottom Interval(mm): 630/ 0 Describer: Christie, D.M.
Hole: 556 Top of Core Depth(m) : 516.00 Rock Type: IGNEOUS
Core: 8 Sample Midpoint(m) : 521.13 Sect/Pc #: 4/PCE 3B
ROCK = APHYRIC BASALT;
Texture: APHYRIC,HYALOPHITIC;
Where sampled: NEXT TO GLASSY MARGIN*
Groundmass - OLIVINE ( <5%)
PLAGIOCLASE (25-30%)
Size(mm): .3-.5 Morphology: LATHS,NEEDLES*
SOME INTERSTITIAL
CLINOPYROXENE ( 40%)
Size(mm): .02 Morphology: GRANULAR
SOME GLOMEROCRYSTS WITH PLAG;
MAGNETITE ( 3%)
Size(mm): .01 Morphology: GRANULAR
DEVITRIFIED GLASS (25-30%)
Alteration - CARBONATE ( 5%)
Location: RANDOM Replacing: MATRIX
Location: PATCHES,
Location: VESICLES
CLAY MINERALS ( <5%)
Location: INTERSTITIAL Replacing: OL,MESOSTASIS
Vesicles -
Size(mm): .5-2
Percent: 3
Filling: CARBONATE
Shape: ROUND
SOME SEGREGATION VESICLES;
Leg : 82 Top/Bottom Interval(mm): 720/ 750 Describer: Mills, W.
Hole: 556 Top of Core Depth(m) : 525.00 Rock Type: UNIDENTIFIED
Core: 9 Sample Midpoint(m) : 528.74 Sect/Pc #: 3/
ROCK = BASALTIC BRECCIA
BASALT AND GLASS CLASTS, SUBANGULAR TO SUBROUNDED,
POORLY SORTED, NO ALTERATION RIMS, MATRIX CLAY TO
SAND-SIZED PARTICLES OF GLASS WITH MOD ABUNDANT
MICRITIC CALCITE*
Alteration - CALCITE
MICRITIC*
Leg : 82 Top/Bottom Interval(mm): 1100/1140 Describer: Mills, W.
Hole: 556 Top of Core Depth(m) : 534.00 Rock Type: UNIDENTIFIED
Core: 10 Sample Midpoint(m) : 536.62 Sect/Pc #: 2/PCE 3A
ROCK = BASALTIC BRECCIA
FRESH BASALT CLASTS, ANGULAR TO SUBANGULAR, MATRIX
SUPPORTED, MATRIX SILT AND CLAY SIZE MATERIAL OF
BASALTIC MATERIAL, ALSO SOMEWHAT CALCAREOUS,
BRECCIA VERY IMMATURE;
Leg : 82 Top/Bottom Interval(mm): 1360/ 0 Describer: Christie, D.M.
Hole: 556 Top of Core Depth(m) : 534.00 Rock Type: IGNEOUS
Core: 10 Sample Midpoint(m) : 536.86 Sect/Pc #: 2/PCE 3B
ROCK = PLAG MODERATELY PHYRIC BASALT;
Texture: MODERATELY PHYRIC,INTERSERTAL;
Where sampled: CLAST IN BRECCIA;
IDENTICAL TO 12-1-4B*
Phenocrysts- PLAGIOCLASE ( 5%)
Size(mm): 2-5 Morphology: PRISMATIC
APPROX COMP AN60*
Groundmass - OLIVINE ( 5-10%)
Size(mm): .1 Morphology: GRANULAR
ALTERED TO GREEN-BROWN;
PLAGIOCLASE ( 30%)
Size(mm): .2-.5 Morphology: LATHS
CLINOPYROXENE ( 40%)
Size(mm): .01-.1 Morphology: GRANULAR-PRISMATIC
MAGNETITE ( 3-5%)
Size(mm): .1 Morphology: GRANULAR
Alteration - CLAY MINERALS ( 15%)
Location: INTERSTITIAL Replacing: OL,MESOSTASIS
Vesicles -
Size(mm): 1
Percent: 1
Filling: CALCITE
Shape: ROUND
Leg : 82 Top/Bottom Interval(mm): 1100/ 0 Describer: Christie, D.M.
Hole: 556 Top of Core Depth(m) : 543.00 Rock Type: IGNEOUS
Core: 11 Sample Midpoint(m) : 544.10 Sect/Pc #: 1/PCE 13
ROCK = PLAG SPARSELY PHYRIC BASALT;
Texture: SPARSELY PHYRIC,INTERSERTAL,SUBOPHITIC;
Where sampled: CLAST IN BRECCIA*
Phenocrysts- PLAGIOCLASE ( 1-2%)
Size(mm): 1-2 Morphology: LATHS
APPROX COMP AN50*
Groundmass - PLAGIOCLASE ( 40%)
CLINOPYROXENE ( 30%)
MAGNETITE ( 5%)
MESOSTASIS (20-25%)
ALTERED TO GREEN CLAY*
Alteration - CLAY MINERALS (10-15%)
Location: INTERSTITIAL Replacing: MESOSTASIS
Vesicles -
Size(mm): .5
Percent: 1
Filling: CARBONATE
Shape: ROUND
SEGREGATION VESICLES*
Leg : 82 Top/Bottom Interval(mm): 550/ 0 Describer: Christie, D.M.
Hole: 556 Top of Core Depth(m) : 552.00 Rock Type: IGNEOUS
Core: 12 Sample Midpoint(m) : 552.55 Sect/Pc #: 1/PCE 4B
ROCK = PLAG-OL MODERATELY PHYRIC BASALT;
Texture: MODERATELY PHYRIC,INTERSERTAL;
Where sampled: CLAST IN BRECCIA*
IDENTICAL TO 82-556-10-2-3B;
Phenocrysts- OLIVINE ( TR%)
Size(mm): 1 Morphology: PRISMATIC
COMPLETELY ALTERED*
Groundmass - OLIVINE ( 5-10%)
Size(mm): .1 Morphology: GRANULAR
ALTERED GREEN-BROWN;
PLAGIOCLASE ( 30%)
Size(mm): .2-.5 Morphology: LATHS
SOME INTERSTITIAL;
CLINOPYROXENE ( 40%)
Size(mm): .01-.1 Morphology: GRANULAR-PRISMATIC
MAGNETITE ( 3-5%)
Size(mm): .1 Morphology: INTERSTITIAL
UNUSUALLY COARSE;
MESOSTASIS (15-20%)
ALTERED DARK BROWN;
SPINEL ( TR%)
Size(mm): .01
IN ALTERED OL,ID UNCERTAIN FOR SPINEL*
Alteration - CARBONATE ( 5%)
Location: VESICLES
CLAY MINERALS ( 20%)
Location: INTERSTITIAL Replacing: OL,MESOSTASIS
Vesicles -
Size(mm): .5-1.5
Percent: 5
Filling: CALCITE AND
Shape: ROUND
Filling: ALTERED GLASS
Leg : 82 Top/Bottom Interval(mm): 1150/1190 Describer: Mills, W.
Hole: 556 Top of Core Depth(m) : 552.00 Rock Type: UNIDENTIFIED
Core: 12 Sample Midpoint(m) : 553.17 Sect/Pc #: 1/PCE 6A
ROCK = BASALTIC BRECCIA
ANGULAR TO SUBROUNDED BASALT CLAST MATRIX
SUPPORTED, MATRIX SILT TO CLAY SIZE BASALT AND
MINERAL FRAGMENTS, NO ALTERATION IN EITHER CLASTS
OR MATRIX;
Leg : 82 Top/Bottom Interval(mm): 1450/1470 Describer: Mills, W.
Hole: 556 Top of Core Depth(m) : 552.00 Rock Type: UNIDENTIFIED
Core: 12 Sample Midpoint(m) : 553.46 Sect/Pc #: 1/PCE 7
ROCK = BASALTIC BRECCIA
BASALT AND GLASS CLASTS, ROUNDED TO SUBANGULAR,
POORLY SORTED, NO ALTERATION RIMS BUT SOME CLASTS
ARE DISCONTINUOUS RIMMED BY SPARRY CALCITE, MATRIX
CLAY TO SAND-SIZE BASALT AND GLASS PARTICLES, SOME
MICRITIC CALCITE;
Alteration - CALCITE
Location: RIM,CLASTS
SPARRY;
CALCITE
MICRITIC*
Leg : 82 Top/Bottom Interval(mm): 1200/1240 Describer: Mills, W.
Hole: 556 Top of Core Depth(m) : 552.00 Rock Type: UNIDENTIFIED
Core: 12 Sample Midpoint(m) : 554.72 Sect/Pc #: 2/PCE 6A
ROCK = BASALTIC BRECCIA
BASALT AND GLASS CLASTS, SUBROUNDED TO SUBANGULAR,
POORLY SORTED, NO OBSERVABLE ALTERATION RIMS,
MATRIX CLAY AND SILT PARTICLES OF BASALT AND GLASS
WITH ABUNDANT MICRITIC CALCITE;
Alteration - CALCITE
MICRITIC*
Leg : 82 Top/Bottom Interval(mm): 1200/ 0 Describer: Brannon, J.
Hole: 556 Top of Core Depth(m) : 552.00 Rock Type: IGNEOUS
Core: 12 Sample Midpoint(m) : 556.20 Sect/Pc #: 3/PCE 5B
ROCK = PLAG SPARSELY PHYRIC BASALT;
Texture: SPARSELY PHYRIC,INTERSERTAL,INTERGRANULAR;
Where sampled: BASALT BRECCIA CLAST*
Phenocrysts- PLAGIOCLASE ( 1%)
Size(mm): .3-1.3 Morphology: LATHS
APPROX COMP AN61,MICROPHENOS*
Groundmass - OLIVINE ( 10%)
Size(mm): .06-.1 Morphology: GRANULAR
REPLACED BY CLAY;
PLAGIOCLASE ( 30%)
Size(mm): .1-.2 Morphology: LATHS
CLINOPYROXENE ( 40%)
Size(mm): .02-.05 Morphology: GRANULAR
MAGNETITE ( 4%)
Size(mm): .01-.04 Morphology: EQUANT
GLASS ( 10%)
Size(mm): .05-.2 Morphology: INTERSTITIAL
Alteration - CLAY MINERALS ( 10%)
Location: INTERSTITIAL Replacing: OL
Vesicles -
Size(mm): .3-.5
Percent: 5
Location: SCATTERED
Filling: DEVT.GLASS AND
Shape: ROUND
Filling: CLAY
Leg : 82 Top/Bottom Interval(mm): 540/ 590 Describer: Mills, W.
Hole: 556 Top of Core Depth(m) : 552.00 Rock Type: UNIDENTIFIED
Core: 12 Sample Midpoint(m) : 557.07 Sect/Pc #: 4/PCE 6
ROCK = CHALK BASALT BRECCIA
BASALT AND GLASS CLASTS, ANGULAR TO SUBROUNDED, NO
ALTERATION RIMS, MICRITIC CLASTS SUBROUNDED WITH
SILT SIZE BASALT AND MINERAL FRAGMENTS, MATRIX
MICRITE CLAY TO SILT SIZE BASALT AND MINERAL
FRAGMENTS;
Leg : 82 Top/Bottom Interval(mm): 660/ 770 Describer: Mills, W.
Hole: 556 Top of Core Depth(m) : 552.00 Rock Type: UNIDENTIFIED
Core: 12 Sample Midpoint(m) : 557.22 Sect/Pc #: 4/PCE 8
ROCK = BASALT CHALK BRECCIA
BASALT AND GLASS CLASTS, ANGULAR TO SUBROUNDED, NO
ALTERATION RIMS, CHALK CLASTS PINKISH SUBROUNDED,
MICRITE WITH SILT SIZE BASALT AND MINERAL
FRAGMENTS, MATRIX MICRITE WITH CLAY TO SILT-SIZED
BASALT AND MINERAL FRAGMENTS, PLUS ONE FORAM;
Leg : 82 Top/Bottom Interval(mm): 60/ 0 Describer: Christie, D.M.
Hole: 556 Top of Core Depth(m) : 561.00 Rock Type: METAMORPHIC
Core: 13 Sample Midpoint(m) : 561.06 Sect/Pc #: 1/
ROCK = OPX-PLAG PHYRIC SERPENTINITE
SERPENTINIZED NORITE;
Texture: HOLOCRYSTALLINE,PHYRIC;
Where sampled: BRECCIA CLAST*
Phenocrysts- PLAGIOCLASE ( 1%)
Size(mm): <2 Morphology: PRISMATIC
90% SERICTIZED;
ORTHOPYROXENE ( 10%)
Size(mm): <3 Morphology: PRISMATIC
MODERATELY ALTERED*
Groundmass - MAGNETITE ( 5%)
Size(mm): .1
HEMATITE ( 3%)
Size(mm): .1
PROBABLY AFTER MAGN;
SERPENTINITE ( 80%)
Leg : 82 Top/Bottom Interval(mm): 80/ 0 Describer: Christie, D.M.
Hole: 556 Top of Core Depth(m) : 565.50 Rock Type: IGNEOUS
Core: 14 Sample Midpoint(m) : 567.08 Sect/Pc #: 2/PCE 1C
ROCK = GABBRO;
Texture: GRANITIC;
Where sampled: CLAST IN BRECCIA*
Groundmass - PLAGIOCLASE ( 60%)
Morphology: ANHEDRAL
APPROX COMP AN60;
CLINOPYROXENE ( 40%)
Morphology: PRISMATIC
PART ALTERED TO LIGHT BROWN AMPHIBOLE,STRONG
EXSOLUTION,ORIGINAL PERCENTAGES FOR PLAG,CPX;
MAGNETITE ( TR%)
ORTHOPYROXENE ( 1%)
ALTERED*
Alteration - AMPHIBOLE ( 10%)
Location: ADJACENT TO Replacing: CPX
Location: CPX
LIGHT BROWN;
CARBONATE ( 1%)
Location: VEINLETS
CHLORITE ( 5%)
Location: ADJACENT TO Replacing: CPX
Location: CPX
PREHNITE ( 15%)
Location: SCATTERED Replacing: PLAG
Location: PATCHES
SERPENTINITE
Location: VEINLETS
Leg : 82 Top/Bottom Interval(mm): 150/ 0 Describer: Christie, D.M.
Hole: 556 Top of Core Depth(m) : 574.50 Rock Type: IGNEOUS
Core: 15 Sample Midpoint(m) : 577.65 Sect/Pc #: 3/PCE 2A
ROCK = GABBRO;
Texture: GRANITIC;
Where sampled: CLAST IN BRECCIA*
PERCENTAGES ARE PRE-ALTERATION;
Groundmass - OLIVINE
SOME REXTLLIZED SACCHAROIDAL TEXTURE-DEFORMATION;
PLAGIOCLASE ( 45%)
Morphology: ANHEDRAL
APPROX COMP AN60;
CLINOPYROXENE ( 35%)
Morphology: PRISMATIC
STRONG EXSOLUTION;
MAGNETITE ( 3%)
Morphology: GRANULAR
ID UNCERTAIN FOR MAGN;
ORTHOPYROXENE ( 5%)
AMPHIBOLE ( 5%)
LARGELY ALTERED,PROBABLY PRIMARY,ALSO SECONDARY*
Alteration - AMPHIBOLE ( 5-10%)
Location: ADJACENT TO Replacing: CPX,OPX,PRIMARY AMPH
Location: PYX
ID UNCERTAIN FOR OPX,GREEN AND GREEN-BROWN;
OTHER ( 1-2%)
Replacing: PSEUDOMORPHS AFTER OL
INCLUDES CARBONATE,HEMATITE AND POSSIBLY RUTILE,
REPLACEMENT ID UNCERTAIN*
Leg : 82 Top/Bottom Interval(mm): 340/ 0 Describer: Christie, D.M.
Hole: 556 Top of Core Depth(m) : 574.50 Rock Type: IGNEOUS
Core: 15 Sample Midpoint(m) : 577.84 Sect/Pc #: 3/PCE 2B
ROCK = GABBRO;
Texture: GRANITIC;
Where sampled: CLAST IN BRECCIA*
Groundmass - PLAGIOCLASE ( 60%)
Size(mm): .5-2
CLINOPYROXENE ( 15%)
Size(mm): 2-3 Morphology: PRISMATIC
STRONGLY EXSOLVED;
ORTHOPYROXENE ( 20%)
Size(mm): 2-3 Morphology: PRISMATIC
AMPHIBOLE ( 1%)
BROWN-BROWN PLEOCHROIC*
Alteration - AMPHIBOLE ( 10%)
Location: ADJACENT TO Replacing: PYX
Location: PYX
GREEN-BROWN*
Leg : 82 Top/Bottom Interval(mm): 30/ 0 Describer: Christie, D.M.
Hole: 556 Top of Core Depth(m) : 583.50 Rock Type: IGNEOUS
Core: 16 Sample Midpoint(m) : 583.53 Sect/Pc #: 1/PCE 1
ROCK = ANORTHOSITE
(PARTLY ALTERED);
Texture: GRANITIC;
Where sampled: CLAST IN BRECCIA*
Groundmass - PLAGIOCLASE ( 80%)
Size(mm): 2-7 Morphology: ANHEDRAL
APPROX COMP AN65;
CLINOPYROXENE ( 20%)
Size(mm): 2-7 Morphology: PRISMATIC
DEFORMED,EXSOLVED*
Alteration - AMPHIBOLE ( 2%)
Location: AROUND CPX Replacing: CPX
COLORLESS-GREEN,POSSIBLY ACTINOLITIC;
CHLORITE ( 5-10%)
Location: AROUND CPX Replacing: CPX
PREHNITE (15-20%)
Location: VEINLETS, Replacing: PLAG
Location: PATCHES
Leg : 82 Top/Bottom Interval(mm): 230/ 0 Describer: Christie, D.M.
Hole: 556 Top of Core Depth(m) : 583.50 Rock Type: IGNEOUS
Core: 16 Sample Midpoint(m) : 583.73 Sect/Pc #: 1/PCE 3B
ROCK = GABBRO;
Texture: GRANITIC;
Where sampled: CLAST IN BRECCIA*
PERCENTAGES ARE PRE-ALTERATION;
Groundmass - PLAGIOCLASE ( 60%)
Size(mm): .5-2 Morphology: ANHEDRAL
APPROX COMP AN60;
CLINOPYROXENE ( 20%)
Size(mm): .5-2 Morphology: SUBHEDRAL
ABUNDANT EXSOLUTION;
MAGNETITE ( TR%)
Morphology: GRANULAR
ORTHOPYROXENE ( 20%)
Size(mm): .5-1.5 Morphology: ANHEDRAL
Alteration - AMPHIBOLE ( 10%)
Location: ADJACENT TO Replacing: PYX
Location: PYX
GREEN*
Leg : 82 Top/Bottom Interval(mm): 1380/ 0 Describer: Neuser, R.
Hole: 556 Top of Core Depth(m) : 583.50 Rock Type: IGNEOUS
Core: 16 Sample Midpoint(m) : 586.38 Sect/Pc #: 2/PCE 15
ROCK = APHYRIC BASALT;
Texture: APHYRIC,INTERSERTAL,INTERGRANULAR;
Where sampled: MEGACLAST WITHIN GABBRO BRECCIA
WS UNCERTAIN*
Groundmass - PLAGIOCLASE ( 50%)
Size(mm): .05-.5 Morphology: ROUND-LATH SHAPED
TWINNED,FELTY TEXTURE;
CLINOPYROXENE ( 20%)
Size(mm): .01-.1 Morphology: ROUND
GRANULAR,UNDULOUS;
OPAQUE MINERALS ( 5%)
Size(mm): <.15
ID UNDETERMINABLE BUT MAY INCLUDE MAGN + ILMENITE;
DEVITRIFIED GLASS ( 20%)
INTERSTITIAL MESOSTASIS*
Alteration - CLAY MINERALS ( 1-3%)
Location: IN VESICLES
Vesicles -
Size(mm): .2-.8
Percent: 1-3
Filling: CLAY
Shape: ROUND
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