Leg : 91 Top/Bottom Interval(mm): 1010/ 0 Describer: Rosencrantz, E.
Hole: 595A Top of Core Depth(m) : 69.80 Rock Type: IGNEOUS
Core: 10 Sample Midpoint(m) : 70.81 Sect/Pc #: 1/PCE 13
ROCK = ANDESITE;
Texture: HOLOCRYSTALLINE, SKELETAL;
Groundmass - PLAGIOCLASE ( 40%)
Size(mm): 0.2-5 Morphology: SUBHEDRAL LATHS
CLINOPYROXENE ( 35%)
Size(mm): 0.2-2 Morphology: ANHEDRAL
COEVAL XTL WITH PLAG;
MAGNETITE ( 5%)
Size(mm): .02 Morphology: SKELETAL,ANGULAR,POLYGONAL
IN PART SKELETAL*
Vesicles -
Percent: <1
Filling: CALCITE
Shape: SPHERICAL
Alteration - CARBONATE ( 10%)
Location: GRAIN
Location: BOUNDARIES Replacing: PLAG,OXIDES,PYX
FOUND AMOUNG GRAIN BOUNDARIES;
CLAY ( 10%)
Location: GRAIN
Location: BOUNDARIES
Leg : 91 Top/Bottom Interval(mm): 250/ 0 Describer: Rosencrantz, E.
Hole: 595A Top of Core Depth(m) : 69.80 Rock Type: IGNEOUS
Core: 10 Sample Midpoint(m) : 71.55 Sect/Pc #: 2/PCE 4
ROCK = ANDESITE;
Texture: MICROXTLINE, SKELETAL;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( <<1%)
Size(mm): 1-2 Morphology: SUBHEDRAL
ZONE, RESORPTION AROUND EDGES;
Groundmass - PLAGIOCLASE ( 35%)
Size(mm): 0.5-2 Morphology: SUBHEDRAL LATHS, NEEDLES
PLAG/PYX COEVAL XTLS, INTERGROWTHS;
CLINOPYROXENE ( 27%)
Size(mm): 0.2-0.5 Morphology: ANHEDRAL, SUBANGULAR
IN PART INTERSERTAL;
MAGNETITE ( 6%)
Size(mm): 0.05 Morphology: ANGULAR, SUBANGULAR
INTERSERTAL;
PERCENTAGES OBTAINED BY POINT COUNT*
Vesicles -
Percent: 0
Alteration - CLAY
Location: THROUGHOUT Replacing: PYX, MAGN
SERICITE SHOWS GRAIN BOUNDARIES, AMORPHOUS*
Leg : 91 Top/Bottom Interval(mm): 1310/ 0 Describer: Rosencrantz, E.
Hole: 595A Top of Core Depth(m) : 69.80 Rock Type: IGNEOUS
Core: 10 Sample Midpoint(m) : 72.61 Sect/Pc #: 2/
ROCK = ANDESITE;
Texture: HOLOXTLINE;
Where sampled: NEXT TO GLASSY MARGIN*
Groundmass - PLAGIOCLASE ( 5-15%)
Size(mm): <0.1-0.2 Morphology: SKELETAL LATHS, NEEDLES
CLINOPYROXENE ( TR%)
Size(mm): <<0.1
OTHER (85-95%)
Size(mm): 0.1 Morphology: SPHERULITES
APPROX COMP PLAG NEEDLES+OXIDES+CLAY+GLASS,
SPHERULITES COMPOSED OF PLAG MICROLITES IN SHEAVES
OR RADIATING FROM CORE, MAGN BLEBS BETWEEN
SPHERES AND/OR BETWEEN INDIVIDUAL PLAG XTLS, PLAG
XTL SIZE IN SPHERE, INCREASES AWAY FROM COOLING
BOUNDARY*
Vesicles -
Size(mm): <1
Percent: <1
Filling: REDDISH BROWN
Shape: SPHERICAL
Filling: CLAY.MIN
Leg : 91 Top/Bottom Interval(mm): 540/ 0 Describer: Rosencrantz, E.
Hole: 595A Top of Core Depth(m) : 69.80 Rock Type: IGNEOUS
Core: 10 Sample Midpoint(m) : 73.34 Sect/Pc #: 3/PCE 1
ROCK = ANDESITE;
Texture: HOLOXTLINE, SKELETAL;
Where sampled: PILLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( <<1%)
Size(mm): 1 Morphology: SUBHEDRAL
APPROX COMP PLAG, PARTIAL RESORPTION*
Groundmass - PLAGIOCLASE ( 40%)
Size(mm): 5 Morphology: SUBHEDRAL
COEVAL PLAG-PYX XTLIZATION;
CLINOPYROXENE ( 30%)
Size(mm): 1-3 Morphology: ANHEDRAL
INTERSERTAL;
MAGNETITE ( 8%)
Size(mm): <0.1 Morphology: ANGULAR
INTERSERTAL*
Vesicles -
Size(mm): 1
Percent: <<1
Filling: CLAY.MIN LINING
Shape: SPHERICAL
Alteration - CLAY ( 23%)
Location: THROUGHOUT Replacing: PYX, OXIDES
Leg : 91 Top/Bottom Interval(mm): 540/ 0 Describer: Rosencrantz, E.
Hole: 595A Top of Core Depth(m) : 69.80 Rock Type: IGNEOUS
Core: 10 Sample Midpoint(m) : 73.34 Sect/Pc #: 3/PCE 2
ROCK = ANDESITE;
PERCENTAGES OBTAINED BY POINT COUNT;
Texture: MICROXTLINE, SKELETAL;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( <1%)
Size(mm): <1 Morphology: SUBHEDRAL
EDGES SHOW RESORPTION*
Groundmass - PLAGIOCLASE ( 40%)
Size(mm): <0.1-1 Morphology: SUBHEDRAL
COEVAL PLAG-PYX XTLIZATION, BOWTIE INTERGROWTHS;
CLINOPYROXENE ( 28%)
Size(mm): <0.3 Morphology: ANHEDRAL, SUBHEDRAL
INTERSERTAL, SUBDOLERITIC;
MAGNETITE ( 15%)
Size(mm): <<0.1 Morphology: INTERSERTAL
Vesicles -
Size(mm): 1
Percent: <1
Location: SCATTERED
Filling: CLAY.MIN
Shape: SPHERICAL
Alteration - CLAY ( 17%)
Location: THROUGHOUT Replacing: PYX, OXIDES
POSSIBLE LOCAL INTERSERTAL GLASS*
Leg : 91 Top/Bottom Interval(mm): 760/ 0 Describer: Rosencrantz, E.
Hole: 595A Top of Core Depth(m) : 69.80 Rock Type: IGNEOUS
Core: 10 Sample Midpoint(m) : 75.06 Sect/Pc #: 4/PCE 5
ROCK = ANDESITE;
PERCENTAGES ESTIMATED*
Texture: HYPOXTLINE, PILOTAXITIC;
Where sampled: NEXT TO GLASSY INTERIOR*
Phenocrysts- PLAGIOCLASE ( <1%)
Size(mm): 0.5-1.5 Morphology: EUHEDRAL
GLOMEROCRYSTS, NEEDLE-LIKE XTL GROWTHS ON ENDS
ZONED IN PART*
Groundmass - PLAGIOCLASE ( 25%)
Size(mm): <0.3 Morphology: ANHEDRAL
LATHS AND NEEDLES MOST ALTERED, BLEBS;
CLINOPYROXENE ( 10%)
Size(mm): <0.1 Morphology: ANHEDRAL
LATHS AND NEEDLES MOST ALTERED, BLEBS;
MAGNETITE ( 15%)
Size(mm): <0.05 Morphology: ANHEDRAL
LATHS AND NEEDLES MOST ALTERED, BLEBS*
Vesicles -
Size(mm): 0.1-1
Percent: 1
Location: THROUGHOUT
Filling: BROWN, REDDISH
Shape: SPHERICAL
Filling: BROWN CLAY.MINS
Alteration - CLAY ( 50%)
Location: PERVASIVE
YELLOWISH BROWN AMORPHOUS REPLACING PYX, POSSIBLY
SERCITES, GRAY TO COLORLESS AMORPHOUS REPLACING
PLAG*
Leg : 91 Top/Bottom Interval(mm): 1170/ 0 Describer: Rosencrantz, E.
Hole: 595A Top of Core Depth(m) : 79.40 Rock Type: IGNEOUS
Core: 11 Sample Midpoint(m) : 80.57 Sect/Pc #: 1/PCE 10
ROCK = FERROBASALT;
Texture: SPHERULITIC;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- PLAGIOCLASE ( <<1%)
Size(mm): 0.5-1 Morphology: EUHEDRAL
Groundmass - PLAGIOCLASE ( 5%)
Size(mm): 0.05-0.2 Morphology: MICROLITES
DENDRITIC;
MAGNETITE
Size(mm): <0.1 Morphology: GRAINS
IN SPHERULITES;
GLASS ( 3%)
Morphology: TAN, CLEAR
ALONG COOLING EDGE INTERSTITIAL TO SPHERULITES;
OTHER ( 92%)
Size(mm): 0.2-0.4 Morphology: SPHERULITES, APPEAR AS BOWTIE
APPROX COMP PLAG+MAGN, STRONGLY COLORED TO BROWNS
AND TANS, PERCENTAGES ESTIMATED*
Vesicles -
Percent: 0
Alteration - CLAY
Location: PERVASIVE
PERCENTAGE UNCERTAIN, POSSIBLE ALTERATION*
Leg : 91 Top/Bottom Interval(mm): 370/ 0 Describer: Rosencrantz, E.
Hole: 595A Top of Core Depth(m) : 79.40 Rock Type: IGNEOUS
Core: 11 Sample Midpoint(m) : 81.27 Sect/Pc #: 2/
ROCK = FERROBASALT;
Texture: SKELETAL, PILOTAXITIC;
Where sampled: PILLOW INTERIOR*
Groundmass - PLAGIOCLASE ( 30%)
Size(mm): 0.1-0.3 Morphology: SUBHEDRAL LATHS
ALTERED IN PART TO CLAYS;
CLINOPYROXENE ( 15%)
Size(mm): 0.2 Morphology: ANHEDRAL, INTERSERTAL
ALTERED IN PART TO CLAYS;
MAGNETITE ( 10%)
Size(mm): 0.01-0.05 Morphology: GRAINS, RODS, INTERSTITIAL
ALTERED IN PART TO CLAYS;
GLASS ( 45%)
Morphology: INTERSTITIAL
ALTERED TO CLAYS, PERCENTAGES ESTIMATED*
Vesicles -
Percent: 0
Alteration - CARBONATE
Location: BELBS, VEINS Replacing: ROCK
ROUND BLEBS, 1.5MM DIAMETER, CALCITE MATRIX WITH
GHOST OF IGNEOUS FABRIC;
CLAY ( 75%)
Location: ALL
Leg : 91 Top/Bottom Interval(mm): 80/ 0 Describer: Rosencrantz, E.
Hole: 595A Top of Core Depth(m) : 79.40 Rock Type: IGNEOUS
Core: 11 Sample Midpoint(m) : 82.48 Sect/Pc #: 3/
ROCK = FERROBASALT;
Texture: VERY FINE-GRAINED, SKELETAL;
Where sampled: PILLOW INTERIOR*
Groundmass - PLAGIOCLASE ( 20%)
Size(mm): 0.1 Morphology: LATHS
CLINOPYROXENE ( 10%)
Size(mm): 0.05 Morphology: ANHEDRAL
INTERSERTAL;
MAGNETITE ( 20%)
Size(mm): 0.1 Morphology: GRANULES, RODS
INTERSTITIAL;
GLASS ( 50%)
Morphology: AMORPHOUS
ALTERED TO CLAYS, INTERSTITIAL*
Vesicles -
Percent: 0
Alteration - CLAY ( 50%)
Location: PERVASIVE
POSSIBLY REPLACING GLASS*
Leg : 91 Top/Bottom Interval(mm): 600/ 0 Describer: Rosencrantz, E.
Hole: 595A Top of Core Depth(m) : 84.40 Rock Type: IGNEOUS
Core: 12 Sample Midpoint(m) : 85.00 Sect/Pc #: 1/
ROCK = FERROBASALT;
Texture: PILOTAXITIC;
Where sampled: PILLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( <<1%)
Size(mm): 0.5 Morphology: EUHEDRAL
Groundmass - PLAGIOCLASE ( 10%)
Size(mm): 0.05-0.5 Morphology: SUBHEDRAL LATHS
DENDRITIC GROWTHS;
MAGNETITE ( 15%)
Size(mm): 0.01 Morphology: GRAINS
INTERSTITIAL TO PLAG MICROLITES AND SPHERULITES;
GLASS ( 10%)
Morphology: INTERSTITIAL
ALTERED TO CLAYS;
OTHER ( 75%)
Size(mm): 0.2-0.3 Morphology: BOW TIE
SPHERULITES, DIFFUSE, POORLY DEFINED*
Vesicles -
Percent: 0
Leg : 91 Top/Bottom Interval(mm): 1000/ 0 Describer: Rosencrantz, E.
Hole: 595A Top of Core Depth(m) : 84.40 Rock Type: IGNEOUS
Core: 12 Sample Midpoint(m) : 85.40 Sect/Pc #: 1/
ROCK = FERROBASALT
Texture: PILOTAXITIC;
Where sampled: PILLOW INTERIOR*
Groundmass - PLAGIOCLASE ( 35%)
Size(mm): 0.3 Morphology: SUBHEDRAL
PARTIALLY ALTERED;
CLINOPYROXENE ( 10%)
Size(mm): <0.1 Morphology: ANHEDRAL
PARTIALLY ALTERED;
MAGNETITE ( 15%)
Size(mm): 0.05 Morphology: GRAINS, RODS
GLASS ( 40%)
Morphology: AMORPHOUS, BROWN
ID UNCERTAIN, ALTERED TO CLAYS*
Vesicles -
Percent: 0
Alteration - CLAY ( 40%)
Location: PERVASIVE
POSSIBLY REPLACING GLASS*
Leg : 91 Top/Bottom Interval(mm): 1080/ 0 Describer: Rosencrantz, E.
Hole: 595A Top of Core Depth(m) : 84.40 Rock Type: IGNEOUS
Core: 12 Sample Midpoint(m) : 85.48 Sect/Pc #: 1/PCE 13A
ROCK = FERROBASALT;
Texture: SKELETAL, SPHERULITIC;
Where sampled: PILLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( <<1%)
Size(mm): 1 Morphology: EUHEDRAL
Groundmass - PLAGIOCLASE ( 5%)
Size(mm): 0.05-0.5 Morphology: MICROLITES
CLINOPYROXENE ( 5%)
Size(mm): <0.1 Morphology: MICROLITES
MAGNETITE ( 15%)
Size(mm): <0.1 Morphology: GRAINS
IN SPHERULITES;
GLASS
Morphology: AMORPHOUS
INTERSTITIAL POSSIBLY, ALTERED;
OTHER ( 90%)
Size(mm): 0.3 Morphology: SHEAVES, BOW TIE
SPHERULITES, APPROX COMP PLAG+MAGN, PERCENTAGES
ESTIMATED, ALL IN PART ALTERED*
Vesicles -
Percent: 0
Alteration - CLAY ( 50%)
Location: PERVASIVE Replacing: ALL MINERALS
AMORPHOUS, GREEN BROWN*
Leg : 91 Top/Bottom Interval(mm): 50/ 0 Describer: Rosencrantz, E.
Hole: 595A Top of Core Depth(m) : 84.40 Rock Type: IGNEOUS
Core: 12 Sample Midpoint(m) : 85.95 Sect/Pc #: 2/
ROCK = FERROBASALT;
Texture: SKELETAL;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( <<1%)
Size(mm): 1 Morphology: SUBHEDRAL
Groundmass - PLAGIOCLASE ( 40%)
Size(mm): 0.1-0.5 Morphology: SUBHEDRAL
PARTIALLY ALTERED;
CLINOPYROXENE ( 15%)
Size(mm): 0.1-0.2
ALTERED TO CLAYS;
MAGNETITE ( 10%)
Size(mm): 0.01-0.1 Morphology: GRAINS, RODS
GLASS ( 35%)
INTERSTITIAL, ALTERED TO CLAYS*
Vesicles -
Percent: 0
Alteration - CLAY ( 35%)
Location: PERVASIVE
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