Leg : 70 Top/Bottom Interval(mm): 240/ 260 Describer: Schrader, E.L.
Hole: 504B Top of Core Depth(m) : 507.50 Rock Type: IGNEOUS
Core: 32 Sample Midpoint(m) : 507.75 Sect/Pc #: 1/
ROCK = BASALTIC BRECCIA
PLAG-OL-CPX PHYRIC BASALT CLASTS,DESCRIPTION
APPLIES TO DOMINANT LITHIC FRAGMENTS;
Texture: VARIOLITIC,PHYRIC;
Where sampled: BRECCIA*
Phenocrysts- OLIVINE ( 5%)
Size(mm): .6 X.5 Morphology: EUHEDRAL
ALTERED TO SMECTITE;
PLAGIOCLASE ( 15%)
Size(mm): .9X.2 Morphology: BLOCKY
CLINOPYROXENE ( 5%)
Size(mm): 1X.5 Morphology: ANHEDRAL-SUBHEDRAL
Groundmass - GLASS ( 25%)
REPRESENTED BY VARIOLITES;
OTHER
SMECTITE AND BROKEN PIECES OF PLAG + CPX XTLS*
Alteration - SMECTITE ( 5%)
Location: SCATTERED Replacing: OL
Vesicles -
Percent: 0
Leg : 70 Top/Bottom Interval(mm): 960/ 980 Describer: Laverne, C.
Hole: 504B Top of Core Depth(m) : 507.50 Rock Type: IGNEOUS
Core: 32 Sample Midpoint(m) : 508.47 Sect/Pc #: 1/PCE 149
ROCK = PLAG-OL-CPX PHYRIC BASALT;
Texture: PHYRIC,GLOMEROPHYRIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 10%)
Size(mm): 0.2X0.5 Morphology: EUHEDRAL
ISOLATED IN THE GROUNDMASS;
PLAGIOCLASE ( 24%)
Size(mm): 1.5X0.2 Morphology: SUBHEDRAL-ANHEDRAL
MANY SIZES,INTERGROWN WITH CPX;
CLINOPYROXENE ( 6%)
Size(mm): 0.7X0.5 Morphology: SUBHEDRAL-ANHEDRAL
Groundmass - OLIVINE ( 10%)
Size(mm): .08X.04 Morphology: ANHEDRAL
PLAGIOCLASE ( 20%)
Size(mm): .16X.01 Morphology: MICROLITES
CLINOPYROXENE ( 3%)
Size(mm): .08X.06 Morphology: ANHEDRAL
ID UNCERTAIN FOR CPX;
MAGNETITE ( 5%)
Size(mm): <.008 Morphology: SKELETAL
INTERSTITIAL TO SILICATES,IN GLASSY AREAS;
GLASS ( 5%)
HEMATITE ( 1%)
IN CRACKS OF PHENOS;
COMBINATION ( 15%)
Morphology: MATURE SHEAF
INCLUDES PLAG + PYX*
Alteration - SMECTITE ( <1%)
Location: SCATTERED Replacing: GLASS
GREEN,REPLACES GLASS OR FILLS TINY VOID*
Vesicles -
Percent: 0
Leg : 70 Top/Bottom Interval(mm): 190/ 210 Describer: Schrader, E.L.
Hole: 504B Top of Core Depth(m) : 507.50 Rock Type: IGNEOUS
Core: 32 Sample Midpoint(m) : 509.20 Sect/Pc #: 2/PCE 160
ROCK = PLAG-CPX-OL PHYRIC BASALT
Texture: VARIOLITIC,PHYRIC;
Where sampled: GLASSY MARGIN*
Phenocrysts- OLIVINE ( 2%)
Size(mm): 0.8X0.6 Morphology: EUHEDRAL
ALTERED TO SMECTITE;
PLAGIOCLASE ( 30%)
Size(mm): 1.5X.8 Morphology: BLOCKY LATHS
OFTEN GLOMEROPORPHYRITIC CLUSTERS WITH CPX;
CLINOPYROXENE ( 13%)
Size(mm): .9X.6 Morphology: EUHEDRAL-ANHEDRAL
Groundmass - MAGNETITE ( 3%)
GLASS ( 63%)
REPRESENTED BY VARIOLITES,REMAINING GLASS BETWEEN
VARIOLITES WAS REPLACED BY SMECTITE*
Alteration - SMECTITE ( 10%)
Location: SCATTERED Replacing: OL,GLASS
Leg : 70 Top/Bottom Interval(mm): 550/ 570 Describer: Laverne, C.
Hole: 504B Top of Core Depth(m) : 507.50 Rock Type: IGNEOUS
Core: 32 Sample Midpoint(m) : 509.56 Sect/Pc #: 2/PCE 165
ROCK = PLAG-OL-CPX PHYRIC BASALT;
Texture: SUB-GLOMEROPHYRIC,PHYRIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 5%)
Morphology: EUHEDRAL
TOTALLY REPLACED AND SOFT ALTERATION PRODUCT WAS
GROUND AWAY IN TS FABRICATION LEAVING A HOLE;
PLAGIOCLASE ( 13%)
Size(mm): .8X.3 Morphology: EUHEDRAL TO SUBHEDRAL LATHS
LATHS SOMETIMES ZONED;
CLINOPYROXENE ( 12%)
Size(mm): .3X.5 Morphology: SUBHEDRAL
Groundmass - OLIVINE ( 2%)
Size(mm): .08X.05 Morphology: ANHEDRAL
PLAGIOCLASE ( 2%)
Size(mm): .15X.01 Morphology: MICROLITES
SIZES OF PLAG CRYSTALS ARE VERY GRADATIONAL;
CLINOPYROXENE
Size(mm): .08X.05 Morphology: ANHEDRAL
MAGNETITE ( 6%)
Size(mm): <.008 Morphology: SKELETAL
GLASS ( 60%)
IMMATURE SHEAF TEXTURE*
Alteration - SMECTITE ( 5%)
Location: CRACKS Replacing: OL
Vesicles -
Percent: 0
Leg : 70 Top/Bottom Interval(mm): 280/ 300 Describer: Laverne, C.
Hole: 504B Top of Core Depth(m) : 507.50 Rock Type: IGNEOUS
Core: 32 Sample Midpoint(m) : 510.79 Sect/Pc #: 3/PCE 180
ROCK = PLAG-OL PHYRIC BASALT;
Texture: MEDIUM GRAINED GLOMEROPHYRIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 5%)
Size(mm): .6X.5 Morphology: EUHEDRAL
ALTERED TO SMECTITE AND HEMATITE ACCORDING TO AREA
AND GROUND AWAY IN TS FABRICATION LEAVING A HOLE;
PLAGIOCLASE ( 10%)
Size(mm): .25X.08 Morphology: ZONED EUHEDRAL LATHS
GATHERED IN CLUSTERS*
Groundmass - OLIVINE ( 25%)
Size(mm): .04X.04 Morphology: ANHEDRAL
OFTEN ALTERED IN SMECTITE + HEMATITE;
PLAGIOCLASE ( 38%)
Size(mm): .25X0.15 Morphology: MICROLITES
MAGNETITE ( 3%)
Size(mm): .04X.008 Morphology: SKELETAL
GLASS ( 5%)
IDENTITY UNCERTAIN FOR GLASS,
REPLACED BY SMECTITE AND ASSOCIATED WITH MAGNETITE
INTERSTITIAL TO MICROLITES OR BETWEEN PHENOCRYSTS
IN THE CLUSTERS;
COMBINATION ( 15%)
Morphology: MATURE SHEAF TEXTURE
INCLUDES PLAG + PYX*
Alteration - SMECTITE
Replacing: GLASS
GREEN SMECTITE;
SMECTITE
Replacing: OL
COLORESS OR PALE GREEN SMECTITE;
HEMATITE ( 5%)
SURROUNDING OL IN ALTERED PART OF ROCK AND FILLING
A CRACK*
Vesicles -
Percent: 0
Leg : 70 Top/Bottom Interval(mm): 730/ 750 Describer: Laverne, C.
Hole: 504B Top of Core Depth(m) : 516.50 Rock Type: IGNEOUS
Core: 33 Sample Midpoint(m) : 517.24 Sect/Pc #: 1/PCE 191
ROCK = PLAG-OL PHYRIC BASALT;
Texture: MEDIUM TO COARSE GRAINED HYALO-OPHITIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 5%)
Size(mm): 1.0X.7 Morphology: EUHEDRAL
TOTALLY REPLACED BY HEMATITE AND POSSIBLY TALC,
ALSO REPLACED BY A GREEN PLEOCHROIC MINERAL;
PLAGIOCLASE ( 10%)
Size(mm): 1.2X.4 Morphology: EUHEDRAL LATHS
Groundmass - OLIVINE ( 10%)
Size(mm): .04X.04 Morphology: ANHEDRAL
ALTERED SAME AS THE PHENOS;
PLAGIOCLASE ( 35%)
Size(mm): .25X.02 Morphology: MICROLITES
ALL THE RANGES OF SIZE BETWEEN MICROLITES AND
PHENOS;
CLINOPYROXENE ( 12%)
Size(mm): .04X.04 Morphology: ANHEDRAL
MAGNETITE ( 5%)
Size(mm): .16X.16 Morphology: SKELETAL
SPINEL ( <1%)
Size(mm): .04X.04 Morphology: EUHEDRAL
Alteration - SMECTITE
Replacing: GLASS,OL
HEMATITE
Replacing: GLASS,OL
FILLS SOME CRACKS AND VOIDS;
TALC
Replacing: OL
CLAY
Replacing: OL
Vesicles -
Percent: 1
Location: SCATTERED
Filling: SMEC OR HEMATIT
Shape: IRREGULAR
VOIDS*
Leg : 70 Top/Bottom Interval(mm): 920/ 950 Describer: Laverne, C.
Hole: 504B Top of Core Depth(m) : 516.50 Rock Type: IGNEOUS
Core: 33 Sample Midpoint(m) : 517.44 Sect/Pc #: 1/PCE 194
ROCK = BASALT
THIS THIN-SECTION HAS NOT BEEN DESCRIBED IN DETAIL
BECAUSE IT IS NOT REPRESENTATIVE OF ITS COOLING
UNIT;
Texture: FINE-GRAINED,VARIOLITIC
BECOMES UNVARIOLITIC*
Groundmass - GLASS
REPLACED BY SMEC*
Alteration - SMECTITE
Replacing: GLASS
Leg : 70 Top/Bottom Interval(mm): 500/ 520 Describer: Laverne, C.
Hole: 504B Top of Core Depth(m) : 516.50 Rock Type: IGNEOUS
Core: 33 Sample Midpoint(m) : 518.51 Sect/Pc #: 2/PCE 207
ROCK = PLAG-OL PHYRIC BASALT;
Texture: MEDIUM TO COARSE GRAINED PHYRIC, HYALO-OPHITIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 20%)
Size(mm): 1.5X1.0 Morphology: EUHEDRAL
ALTERED TO SMECTITE + TALC IN ONE AREA AND
HEMATITE + TALC IN ANOTHER AREA;
PLAGIOCLASE ( 15%)
Size(mm): .7X.4 Morphology: EUHEDRAL LATHS
CLINOPYROXENE ( 1%)
Size(mm): 1.2X.5 Morphology: EUHEDRAL
Groundmass - OLIVINE ( 5%)
Size(mm): .07X.07 Morphology: ANHEDRAL
ALTERED;
PLAGIOCLASE ( 20%)
Size(mm): .2X.01 Morphology: MICROLITES
VERY EQUAL SIZES;
CLINOPYROXENE ( 5%)
Size(mm): .07X.07 Morphology: ANHEDRAL
MAGNETITE ( 4%)
Size(mm): <.01 Morphology: SKELETAL
GLASS ( 5%)
INTERSTITIAL TO SILICATES, ASSOCIATED WITH MAGN;
COMBINATION ( 20%)
INCLUDES PYX + PLAG,
MATURE SHEAF TEXTURE*
Alteration - HEMATITE
Location: CRACKS, VOIDS
SMECTITE
TALC
Replacing: OL
HEMATITE
Replacing: OL
SMECTITE
Replacing: OL
Vesicles -
Percent: 5
Location: SCATTERED
Filling: SMEC OR HEMATIT
Shape: IRREGULAR
VOIDS*
Leg : 70 Top/Bottom Interval(mm): 1260/1290 Describer: Laverne, C.
Hole: 504B Top of Core Depth(m) : 516.50 Rock Type: IGNEOUS
Core: 33 Sample Midpoint(m) : 519.28 Sect/Pc #: 2/PCE 216
ROCK = PLAG-OL MOD PHYRIC BASALT;
Texture: MEDIUM TO COARSE GRAINED,OPHITIC
SOME SMALL AREAS OF GLASS;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 2%)
Size(mm): 1.8X1.6 Morphology: EUHEDRAL
POSSIBLE REPLACEMENT BY HEMATITE, REPLACEMENT MATL
GROUND AWAY IN TS FABRICATION LEAVING A HOLE;
PLAGIOCLASE ( 2%)
Size(mm): 1.2X1.0 Morphology: SUBHEDRAL LATHS
Groundmass - PLAGIOCLASE ( 40%)
Size(mm): .7X.3 Morphology: LATHS
PLAGIOCLASE
Size(mm): .08X.008
ALL SIZES BETWEEN PHENOS AND CRYSTALS FROM
GROUNDMASS OCCUR;
CLINOPYROXENE ( 36%)
Size(mm): .16X.15 Morphology: ANHEDRAL, PARALLEL
MAGNETITE ( 15%)
Size(mm): .024X.002 Morphology: MICROLITES AND SKELETAL XTALS
GATHERED ON AREAS INTERSTITIAL TO SILICATES,
POSSIBLY WITH GLASS;
GLASS ( 5%)
SPINEL ( 1%)
Size(mm): .1X.1 Morphology: EUHEDRAL
Alteration - SMECTITE ( <1%)
Replacing: GLASS
FERROUS OXIDE ( 1%)
Replacing: OL
PART OF OLIVINE REPLACED*
Vesicles -
Size(mm): .08
Percent: 1
Location: SCATTERED
Filling: SMECTITE,
Filling: FE.OXIDE
Leg : 70 Top/Bottom Interval(mm): 1330/1340 Describer: Laverne, C.
Hole: 504B Top of Core Depth(m) : 525.50 Rock Type: IGNEOUS
Core: 34 Sample Midpoint(m) : 526.84 Sect/Pc #: 1/PCE 234
ROCK = PLAG-OL PHYRIC BASALT;
Texture: FINE GRAINED,SUBGLOMEROPHYRIC, FROM EXTERIOR TO
INTERIOR-GLASSY, VARIOLITIC,SUBVARIOLITIC;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- OLIVINE ( 2%)
Size(mm): .8X.7 Morphology: EUHEDRAL
REPLACED BY POSSIBLY SMECTITE OR IDDINGS;
PLAGIOCLASE ( 10%)
Size(mm): 1.0X.7 Morphology: SUBHEDRAL LATHS
Groundmass - PLAGIOCLASE ( 6%)
Size(mm): .2X.005 Morphology: MICROLITES
MAGNETITE ( 2%)
Size(mm): <.008
LOCATED BETWEEN THE VARIOLES;
GLASS ( 10%)
REPLACED BY GREEN SMECTITE;
COMBINATION ( 70%)
INCLUDES PYX + PLAG, VARIOLITIC AND SUBVARIOLITIC
TEXTURE*
Alteration - SMECTITE
Replacing: GLASS
Vesicles -
Percent: 0
Leg : 70 Top/Bottom Interval(mm): 1180/1200 Describer: Laverne, C.
Hole: 504B Top of Core Depth(m) : 525.50 Rock Type: IGNEOUS
Core: 34 Sample Midpoint(m) : 528.19 Sect/Pc #: 2/PCE 253
ROCK = PLAG-OL PHYRIC BASALT;
Texture: HYALO-OPHITIC, MEDIUM GRAINED,PHYRIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 7%)
Size(mm): .8X.6 Morphology: EUHEDRAL
THE PARTS WHICH HAVE NOT BEEN GROUND OUT IN THE
FABRICATION OF THE THIN SECTION ARE FRESH;
PLAGIOCLASE ( 7%)
Size(mm): 1.2X.8 Morphology: EUHEDRAL OR SUBHEDRAL LATHS
Groundmass - OLIVINE ( 5%)
Size(mm): .08X.08 Morphology: ANHEDRAL
FRESH IF NOT GROUND OUT BY TS FABRICATION;
PLAGIOCLASE ( 25%)
Size(mm): .08X.005 Morphology: MICROLITES
NUMEROUS OTHER SIZES BETWEEN SMALLEST MICROLITES
AND THE PHENOS;
MAGNETITE ( 6%)
Size(mm): <.008 Morphology: SKELETAL
THE CRYSTALS ARE SCATTERED THROUGH THE WHOLE ROCK
AND NOT GATHERED IN SOME AREAS LIKE IN OTHER
SAMPLES;
COMBINATION ( 50%)
INCLUDING PYX + PLAG, MATURE SHEAF TEXTURE
CRYSTALS PARTLY REPLACED BY IRON OXIDES*
Alteration - FERROUS OXIDE ( 8%)
FILLING NUMEROUS CRACKS IN GROUNDMASS AND PHENOS*
Vesicles -
Percent: 0
Leg : 70 Top/Bottom Interval(mm): 440/ 460 Describer: Laverne, C.
Hole: 504B Top of Core Depth(m) : 534.50 Rock Type: IGNEOUS
Core: 35 Sample Midpoint(m) : 534.95 Sect/Pc #: 1/PCE 264
ROCK = APHYRIC BASALT;
Texture: MEDIUM GRAINED, HYALO-OPHITIC,APHYRIC;
Where sampled: FLOW INTERIOR*
Groundmass - PLAGIOCLASE ( 35%)
Size(mm): .4X.02 Morphology: MICROLITES
CLINOPYROXENE ( 8%)
Size(mm): .06X.01 Morphology: ANHEDRAL
MAGNETITE ( 8%)
Size(mm): .01 Morphology: SKELETAL
SPINEL ( <1%)
Size(mm): .06X.06 Morphology: EUHEDRAL
COMBINATION ( 40%)
INCLUDING PYX + PLAG, MATURE SHEAF TEXTURE,
PARTLY REPLACED BY IRON HYDROXIDE OR IRON OXIDE*
Alteration - SMECTITE
Location: MROLITIC VOID
FERROUS OXIDE
Replacing: PART OF GRNDMASS PYX+PLAG
Vesicles -
Size(mm): 0.3X.15
Percent: 9
Filling: SMEC, FE.HYDRX
Shape: IRREGULAR
MIAROLITIC VOIDS*
Leg : 70 Top/Bottom Interval(mm): 840/ 850 Describer: Laverne, C.
Hole: 504B Top of Core Depth(m) : 534.50 Rock Type: IGNEOUS
Core: 35 Sample Midpoint(m) : 535.35 Sect/Pc #: 1/PCE 270
ROCK = PLAG-OL MODERATELY PHYRIC BASALT;
Texture: GLASSY,VARIOLITIC,SUBVARIOLITIC,FINE GRAINED,
Piece #: IC;
Where sampled: GLASSY MARGIN AND NEXT TO THE GLASSY MARGIN*
Phenocrysts- OLIVINE ( 1%)
Size(mm): .64X.3 Morphology: PERFECTLY EUHEDRAL
SOMETIMES QUITE ANHEDRAL;
PLAGIOCLASE ( 2%)
Size(mm): 1.5X.4 Morphology: EUHEDRAL LATHS
Groundmass - OLIVINE ( 5%)
Size(mm): .1X.1 Morphology: EUHEDRAL
PLAGIOCLASE ( 10%)
Size(mm): .5X.005 Morphology: MICROLITES
MAGNETITE
Size(mm): <<.001
COMBINATION ( >82%)
INCLUDING PYX + PLAG,
VARIOLITIC AND SUBVARIOLITIC*
Alteration - CLAYS
Replacing: OL
IDENTITY UNSURE FOR CLAYS*
Vesicles -
Percent: 0
Leg : 70 Top/Bottom Interval(mm): 340/ 360 Describer: Laverne, C.
Hole: 504B Top of Core Depth(m) : 534.50 Rock Type: IGNEOUS
Core: 35 Sample Midpoint(m) : 536.35 Sect/Pc #: 2/PCE 287
ROCK = PLAG-OL MODERATELY PHYRIC BASALT;
Texture: HYALO-OPHITIC, MEDIUM GRAINED,SUBGLOMEROPHYRIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 1%)
Size(mm): .25X.2 Morphology: SUBHEDRAL
PLAGIOCLASE ( 5%)
Size(mm): 1X.6 Morphology: SUBHEDRAL LATHS
Groundmass - OLIVINE ( 4%)
Size(mm): .02X.02 Morphology: ANHEDRAL
PLAGIOCLASE ( 40%)
Size(mm): .08X.008 Morphology: MICROLITES
MAGNETITE ( 6%)
Size(mm): <.008 Morphology: POSSIBLY SKELETAL
SPINEL ( 1%)
Morphology: EUHEDRAL
COMBINATION ( 40%)
INCLUDES PYX+PLAG, MATURE SHEAF TEXTURE, WHERE
XTALS ARE PARTLY REPLACED BY FE.OXIDES;
IN THE WHOLE SECTION NUMEROUS HOLES OCCUR AND IT
IS IMPOSSIBLE TO DETERMINE IF THEY WERE MINERALS
PICKED OUT DURING FABRICATION OF THE TS OR NOT*
Alteration - SMECTITE
Location: VOIDS, CRACK
FERROUS OXIDE ( 20%)
Location: SOME VOIDS Replacing: PART OF THE GROUNDMASS
Vesicles -
Size(mm): 0.7
Percent: 4
Location: SCATTERED
Filling: SMECTITE
Shape: IRREGULAR
MIAROLITIC VOIDS*
Leg : 70 Top/Bottom Interval(mm): 530/ 560 Describer: Schrader, E.L.
Hole: 504B Top of Core Depth(m) : 534.50 Rock Type: IGNEOUS
Core: 35 Sample Midpoint(m) : 536.55 Sect/Pc #: 2/PCE 289
ROCK = PLAG-OL MODERATELY PHYRIC BASALT;
Texture: HYALO-OPHITIC, PHYRIC;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- OLIVINE ( 1-2%)
Size(mm): .25X2.0 Morphology: EUHEDRAL-SUBHEDRAL
SLIGHTLY ALTERED TO IDDINGS IN CRACKS;
PLAGIOCLASE ( 3%)
Size(mm): 1X.6 Morphology: BLOCKY-EQUANT
Groundmass - PLAGIOCLASE (25-30%)
Morphology: SKELETAL LATHS
MAGNETITE ( 8-10%)
Size(mm): .05 Morphology: SKELETAL
GLASS ( 60%)
REPRESENTED BY QUENCHED PLAG-CPX NEEDLES*
Alteration - SMECTITE ( <1%)
Location: SCATTERED Replacing: GLASS
SCARCE;
FERROUS OXIDE ( 2-5%)
Replacing: MAGN,GLASS
LOCATION IS INTERSTITIAL TO FELDSPARS*
Leg : 70 Top/Bottom Interval(mm): 780/ 800 Describer: Laverne, C.
Hole: 504B Top of Core Depth(m) : 543.50 Rock Type: IGNEOUS
Core: 36 Sample Midpoint(m) : 544.29 Sect/Pc #: 1/PCE 299
ROCK = PLAG-CPX SPARSELY PHYRIC BASALT;
Texture: SUBOPHITIC TO INTERSERTAL, MEDIUM GRAINED,
Piece #: IC;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( 1%)
Size(mm): 1.2X.6 Morphology: SUBHEDRAL ZONED LATH
CLINOPYROXENE ( <1%)
Size(mm): .5X.4 Morphology: SUBHEDRAL
Groundmass - PLAGIOCLASE ( 35%)
Size(mm): .8X.04 Morphology: EUHEDRAL LATHS
CLINOPYROXENE ( 37%)
Size(mm): .24X.20 Morphology: ANHEDRAL
MAGNETITE ( 5%)
Size(mm): .06X.05 Morphology: EUHEDRAL
IN GLASSY AREAS;
GLASS ( 20%)
COMPLETELY REPLACED BY SMECTITE*
Alteration - SMECTITE ( 22%)
Replacing: GLASS OR FILLING VOIDS
Vesicles -
Size(mm): .80
Percent: 2
Location: SCATTERED
Filling: SMEC OR VOIDS
Shape: IRREGULAR
MIAROLITIC VOIDS*
Leg : 70 Top/Bottom Interval(mm): 680/ 700 Describer: Laverne, C.
Hole: 504B Top of Core Depth(m) : 543.50 Rock Type: IGNEOUS
Core: 36 Sample Midpoint(m) : 545.69 Sect/Pc #: 2/PCE 309
ROCK = PLAG-OL MOD PHYRIC BASALT;
Texture: SUBOPHITIC TO INTERSERTAL (SOME GLASSY AREAS),
MEDIUM GRAINED,PHYRIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( <1%)
Size(mm): .6X.4 Morphology: SUBHEDRAL
TOTALLY REPLACED BY GREEN SMECTITE AND TALC
PLAGIOCLASE ( 2%)
Size(mm): 1.2X0.6 Morphology: SUBHEDRAL LATHS
Groundmass - PLAGIOCLASE ( 37%)
Size(mm): 0.6X.05 Morphology: EUHEDRAL LATHS
SEVERAL PLAG LATHS CROSS A CPX;
CLINOPYROXENE ( 37%)
Size(mm): .3X.2 Morphology: ANHEDRAL
CRYSTAL SUBOPHITIC TEXTURE;
MAGNETITE ( 4%)
Size(mm): .06X.04 Morphology: SUBHEDRAL,SKELETAL
IN GLASSY AREAS;
ILMENITE
Size(mm): .008 Morphology: SKELETAL
GLASS ( 20%)
COMPLETELY REPLACED BY SMECTITE*
Alteration - SMECTITE ( 20%)
Replacing: GLASS AND FILLING VOIDS
Vesicles -
Size(mm): .8X.3
Percent: 4
Location: SCATTERED
Filling: SMECTITE
Shape: IRREGULAR
VOIDS, MAY BE EX GLASS*
Leg : 70 Top/Bottom Interval(mm): 1010/1030 Describer: Laverne, C.
Hole: 504B Top of Core Depth(m) : 543.50 Rock Type: IGNEOUS
Core: 36 Sample Midpoint(m) : 547.52 Sect/Pc #: 3/PCE 325
ROCK = PLAG-CPX MODERATELY PHYRIC BASALT;
Texture: OPHITIC TO INTERSERTAL,MEDIUM TO COARSE GRAINED,
Piece #: IC;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( 2%)
Size(mm): 1.1X.6 Morphology: SUBHEDRAL LATHS
CLINOPYROXENE ( 2%)
Size(mm): 1.2X1.0 Morphology: SUBHEDRAL
ONE HUGE PYX PHENO 5X5 MM*
Groundmass - PLAGIOCLASE ( 38%)
Size(mm): .5X.03 Morphology: SUBHEDRAL LATHS
CLINOPYROXENE ( 38%)
Size(mm): .2X.2 Morphology: ANHEDRAL
MAGNETITE ( 5%)
Size(mm): .05X.05 Morphology: SKELETAL
CHIEFLY IN GLASSY AREAS;
GLASS ( 15%)
INTERSTITIAL TO SILICATES MORE OR LESS ABUNDANT
ACCORDING TO THE AREA-AND COMPLETELY REPLACED BY
SMECTITE*
Alteration - SMECTITE ( 15%)
Replacing: GLASS
Vesicles -
Percent: 0
Leg : 70 Top/Bottom Interval(mm): 780/ 820 Describer: Laverne, C.
Hole: 504B Top of Core Depth(m) : 543.50 Rock Type: IGNEOUS
Core: 36 Sample Midpoint(m) : 548.80 Sect/Pc #: 4/PCE 333
ROCK = CPX-PLAG MODERATELY PHYRIC BASALT;
Texture: SUBOPHITIC SLIGHTLY INTERSERTAL, MEDIUM GRAINED,
Piece #: IC;
Where sampled: FLOW INTERIOR*
Phenocrysts- CLINOPYROXENE ( 9%)
Size(mm): 2.5X1.0 Morphology: SUBHEDRAL LATHS
WHOLE BORDERS ARE IRREGULAR;
PLAGIOCLASE ( 3%)
Size(mm): .6X.2 Morphology: SUBHEDRAL LATHS
OFTEN GATHERED IN SOME AREAS*
Groundmass - PLAGIOCLASE ( 40%)
Size(mm): .3X.025 Morphology: SUBHEDRAL LATHS
CLINOPYROXENE ( 40%)
Size(mm): .3X.15 Morphology: ANHEDRAL
MAGNETITE ( 4%)
Size(mm): .025 Morphology: EUHEDRAL OR SKELETAL
GLASS ( 4%)
REPLACED BY GREEN SMECTITES*
Alteration - SMECTITE ( 4%)
Replacing: GLASS
Vesicles -
Percent: 0
Leg : 70 Top/Bottom Interval(mm): 1150/1180 Describer: Laverne, C.
Hole: 504B Top of Core Depth(m) : 552.50 Rock Type: IGNEOUS
Core: 37 Sample Midpoint(m) : 553.67 Sect/Pc #: 1/PCE 357
ROCK = PLAG-OL-CPX MODERATELY PHYRIC BASALT;
Texture: FINE GRAINED,SUBVARIOLITIC,SUBGLOMEROPHYRIC;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- OLIVINE ( <2%)
Size(mm): .5X.3 Morphology: EUHEDRAL
COMPLETELY REPLACED BY IDDINGS AND SMEC, NOW A
HOLE DUE TO TS FABRICATION;
PLAGIOCLASE ( 3%)
Size(mm): 1.1X.25 Morphology: SUBHEDRAL LATHS
CLINOPYROXENE ( 1%)
Size(mm): .45X.15 Morphology: ANHEDRAL
PLAG AND CPX OFTEN GATHERED IN INTERGROWN CLUMPS*
Groundmass - PLAGIOCLASE ( 10%)
Size(mm): 0.9X.04 Morphology: MICROLITES,SKELETAL
SOMETIMES SKELETAL;
CLINOPYROXENE ( 2%)
Size(mm): .08X.06 Morphology: ANHEDRAL
MAGNETITE ( 3%)
Size(mm): <.008
COMBINATION ( 80%)
INCLUDES PYX+PLAG, IMMATURE SHEAF TEXTURE*
Alteration - SMECTITE
Replacing: OL
IDDINGSITE
Replacing: OL
THE NATURE OF THIS REPLACEMENT CANNOT BE PROVED
HERE, A HOLES EXIST DUE TO TS FABRICATION*
Vesicles -
Percent: 0
Leg : 70 Top/Bottom Interval(mm): 510/ 540 Describer: Laverne, C.
Hole: 504B Top of Core Depth(m) : 552.50 Rock Type: IGNEOUS
Core: 37 Sample Midpoint(m) : 556.03 Sect/Pc #: 3/PCE 397
ROCK = PLAG-OL-CPX SPARSELY PHYRIC BASALT;
Texture: HYALO-OPHITIC, PHYRIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( <1%)
Size(mm): .4X.4 Morphology: EUHEDRAL
COMPLETELY ALTERED IN HEMATITE AND GREEN SMECTITE;
PLAGIOCLASE ( 1%)
Size(mm): 1.0X.35 Morphology: SUBHEDRAL LATHS
PARTLY ALTERED AND CROSSED BY SMECTITE VEINS;
CLINOPYROXENE ( <1%)
Size(mm): .2X.2 Morphology: ANHEDRAL
Groundmass - PLAGIOCLASE ( 30%)
Size(mm): .4X.02 Morphology: MICROLITES
CLINOPYROXENE ( 20%)
Size(mm): .06X.04 Morphology: ANHEDRAL
MAGNETITE ( 7%)
Size(mm): <.008 Morphology: SKELETAL
GLASS ( 4%)
COMPLETELY REPLACED BY SMECTITE;
COMBINATION ( 36%)
INCLUDES PYX+PLAG, MATURE SHEAF TEXTURE*
Alteration - COMBINATION ( 10%)
Replacing: OL
INCLUDES SMEC + HEMATITE;
ZEOLITE ( 2%)
Replacing: SOME PLAG PHENOS
IDENTITY UNCERTAIN ABOUT ZEOLITES*
Vesicles -
Percent: 3
Filling: FE.OXIDE, SMEC
MIAROLITIC VOIDS*
Leg : 70 Top/Bottom Interval(mm): 280/ 310 Describer: Laverne, C.
Hole: 504B Top of Core Depth(m) : 561.50 Rock Type: IGNEOUS
Core: 38 Sample Midpoint(m) : 561.80 Sect/Pc #: 1/PCE 414
ROCK = OL-PLAG-CPX MODERATELY PHYRIC BASALT;
Texture: HYALO-OPHITIC, MEDIUM GRAINED PHYRIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 5%)
Size(mm): 1.7X.8 Morphology: PERFECTLY EUHEDRAL
COMPLETELY REPLACED BY COLORLESS SMEC, CRACKS
FILLED BY IDDINGS;
PLAGIOCLASE ( 4%)
Size(mm): .8X.16 Morphology: EUHEDRAL LATHS
POSSIBLY ALTERED;
CLINOPYROXENE ( 1%)
Size(mm): .4X.3 Morphology: ANHEDRAL
Groundmass - PLAGIOCLASE ( 30%)
Size(mm): .3X.01 Morphology: MICROLITES
CLINOPYROXENE ( 5%)
Size(mm): .08X.06 Morphology: ANHEDRAL
MAGNETITE ( 2%)
Size(mm): .01X.01 Morphology: SKELETAL
COMBINATION ( 45%)
INCLUDES PYX + PLAG, MATURE SHEAF TEXTURE*
Alteration - CALCITE
Location: CRACK, VOIDS
ASSOCIATED WITH SMECTITE;
COMBINATION
Location: VOIDS, CRACKS Replacing: OL
INCLUDES SMEC + IDDINGS;
ZEOLITE
Location: CRACK
COMBINATION
Location: VOIDS
INCLUDES FE.OXIDES + FE.HYDRX*
Vesicles -
Size(mm): .6X.8
Percent: 8
Location: SCATTERED
Filling: SMEC, FE.OXIDE
Shape: IRREGULAR
Leg : 70 Top/Bottom Interval(mm): 1290/1310 Describer: Laverne, C.
Hole: 504B Top of Core Depth(m) : 561.50 Rock Type: IGNEOUS
Core: 38 Sample Midpoint(m) : 564.30 Sect/Pc #: 2/PCE 452
ROCK = OL-PLAG-CPX MODERATELY PHYRIC BASALT;
Texture: HYALO-OPHITIC, MEDIUM GRAINED,PHYRIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 2%)
Size(mm): .7X.3 Morphology: EUHEDRAL
COMPLETELY REPLACED BY SMEC AND POSSIBLY CALCITE;
PLAGIOCLASE ( 2%)
Size(mm): 1.2X.3 Morphology: EUHEDRAL OR SUBHEDRAL LATHS
CLINOPYROXENE ( 1%)
Size(mm): .35X.30 Morphology: ANHEDRAL
PLAG AND CPX CRYSTALS HAVE OFTEN GROWN FROM THE
SAME NUCLEUS*
Groundmass - OLIVINE ( 3%)
Size(mm): .2X.05 Morphology: EUHEDRAL OR ANHEDRAL
COMPLETELY REPLACED BY GREEN SMECTITE, FE.OXIDES,
AND FE.HYDRX;
PLAGIOCLASE ( 25%)
Size(mm): .2X.01 Morphology: MICROLITES
CLINOPYROXENE ( 2%)
Size(mm): .04X.04
MAGNETITE ( 5%)
Size(mm): .01X.008 Morphology: SKELETAL
GLASS ( 5%)
COMBINATION ( 55%)
INCLUDES PYX+PLAG, MATURE SHEAF TEXTURE*
Alteration - GLASS
SMECTITE
FERROUS OXIDE
FERROUS HYDROX MINS
ALL REPLACING GLASS, OL, AND MIAROLITIC VOIDS;
THE NATURE AND PERCENTAGE OF THIS REPLACEMENT,
DEPENDS ON THE AREA OF THE SECTION*
Vesicles -
Size(mm): .4X.4
Location: SCATTERED
Filling: NOW = HOLE
Shape: IRREGULAR
VOIDS, CAN BE OLD OLIVINE (ANHEDRAL)*
Leg : 70 Top/Bottom Interval(mm): 480/ 500 Describer: Laverne, C.
Hole: 504B Top of Core Depth(m) : 570.50 Rock Type: IGNEOUS
Core: 39 Sample Midpoint(m) : 570.99 Sect/Pc #: 1/PCE 462
ROCK = PLAG-CPX MODERATELY PHYRIC BASALT;
Texture: FINE GRAINED,SUBGLOMEROPHYRIC;
Where sampled: FLOW INTERIOR
Phenocrysts- OLIVINE ( <1%)
Size(mm): .8X.6 Morphology: PERFECTLY EUHEDRAL
NOW = HOLE, ONLY SHAPE OF THE CRYSTAL INDICATES IT
IS OL;
PLAGIOCLASE ( 5%)
Size(mm): .6X.2 Morphology: SUBHEDRAL TO EUHEDRAL LATHS
GATHERED IN CLUSTERS WITH OR WITHOUT CPX;
CLINOPYROXENE ( <1%)
Size(mm): .3X.3 Morphology: ANHEDRAL
ASSOCIATED WITH PLAG CRYSTALS IN CLUSTERS*
Groundmass - PLAGIOCLASE ( 24%)
Size(mm): .8X.04 Morphology: MICROLITES OR LATHS
CLINOPYROXENE ( 3%)
Size(mm): .05X.05 Morphology: ANHEDRAL
MAGNETITE ( 3%)
Size(mm): <.008 Morphology: SKELETAL
SCATTERED IN THE GROUNDMASS, MANY CRYSTALS ARE
GATHERED IN AN ELONGATED AREA (GENERAL SHAPE OF A
VEIN) WHICH CROSSES THE WHOLE ROCK;
SPINEL ( <1%)
COMBINATION ( 65%)
INCLUDES PYX+PLAG, IMMATURE AND MATURE SHEAF TEX*
Alteration - OTHER
Replacing: OL
UNKNOWN*
Vesicles -
Percent: 0
Leg : 70 Top/Bottom Interval(mm): 1400/1420 Describer: Schrader, E.L.
Hole: 504B Top of Core Depth(m) : 570.50 Rock Type: IGNEOUS
Core: 39 Sample Midpoint(m) : 571.91 Sect/Pc #: 1/PCE 476
ROCK = OL-PLAG MODERATELY PHYRIC BASALT;
Texture: INTERSERTAL WITH OPHITIC AREAS, PHYRIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 2-3%)
Size(mm): .35X.35 Morphology: EUHEDRAL
ALTERED TO SMEC;
PLAGIOCLASE ( 2-3%)
Size(mm): 1.3X.8 Morphology: BLOCKY
Groundmass - OLIVINE ( 30%)
Size(mm): .7X.7 Morphology: ANHEDRAL
PLAGIOCLASE ( 35%)
Size(mm): .8X.1 Morphology: SKELETAL-LATH
MAGNETITE ( 5-10%)
Size(mm): .1X.05 Morphology: SKELETAL
GLASS (25-30%)
REPRESENTED BY MICROLITES AND ALTERED ZONES*
Alteration - SMECTITE
Location: SCATTERED Replacing: OL, GLASS
OXIDE
Location: SCATTERED Replacing: GLASS, MAGNETITE
Leg : 70 Top/Bottom Interval(mm): 400/ 420 Describer: Laverne, C.
Hole: 504B Top of Core Depth(m) : 570.50 Rock Type: IGNEOUS
Core: 39 Sample Midpoint(m) : 572.41 Sect/Pc #: 2/PCE 486
ROCK = PLAG-OL PHYRIC BASALT;
Texture: HYALO-OPHITIC, FINE TO MEDIUM GRAINED PHYRIC;
THE GROUNDMASS IS MATURE TO IMMATURE SHEAF TEX;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 4%)
Size(mm): 1.0X.8 Morphology: EUHEDRAL
TOTALLY REPLACED BY POSSIBLY SMECTITE + (HOLE);
PLAGIOCLASE ( 10%)
Size(mm): 1.1X.5 Morphology: SUBHEDRAL LATH
SOMETIMES ZONED AND CROSSED BY OPAQUE VEINS;
CLINOPYROXENE ( 1%)
Size(mm): .4X.32 Morphology: EUHEDRAL
FRESH*
Groundmass - OLIVINE ( 3%)
Size(mm): .06X.05 Morphology: EUHEDRAL
COMPLETELY REPLACED BY POSSIBLY SMECTITE;
PLAGIOCLASE ( 10%)
Size(mm): .12X.005 Morphology: MICROLITES
CLINOPYROXENE ( 2%)
Size(mm): .02X.02 Morphology: ANHEDRAL
MAGNETITE ( 5%)
Morphology: SKELETAL
COMBINATION ( 70%)
INCLUDES PYX+PLAG, MATURE TO IMMATURE SHEAF TEX*
Alteration - SMECTITE
Replacing: OL
IDENTITY UNCERTAIN FOR SMECTITE
Vesicles -
Percent: 2
Filling: SMECTITE
MIAROLITIC VOIDS*
Leg : 70 Top/Bottom Interval(mm): 1350/1380 Describer: Laverne, C.
Hole: 504B Top of Core Depth(m) : 570.50 Rock Type: IGNEOUS
Core: 39 Sample Midpoint(m) : 573.37 Sect/Pc #: 2/PCE 496
ROCK = PLAG-OL MODERATELY PHYRIC BASALT;
Texture: OPHITIC-INTERGRANULAR, MEDIUM GRAINED,
SUBGLOMEROPHYRIC, VERY SMALL AMOUNT OF GLASS;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( >2%)
Size(mm): .8X.5 Morphology: PERFECTLY EUHEDRAL
PARTLY REPLACED BY SMEC OR SERPENTINE, PARTLY
FRESH;
PLAGIOCLASE ( 8%)
Size(mm): 1.2X.5 Morphology: SUBHEDRAL LATHS
OFTEN GATHERED IN SOME KIND OF CLUSTER AND ZONED*
Groundmass - PLAGIOCLASE ( 40%)
Size(mm): .2X.03 Morphology: LATHS
CLINOPYROXENE ( 40%)
Size(mm): .35X.30 Morphology: ANHEDRAL
PLAG AND CPX ARE BOTH GATHERED IN AN OPHITIC TEX;
MAGNETITE ( 3%)
Size(mm): .01X.01 Morphology: SKELETAL
GLASS ( 7%)
PART OF THIS GLASS MAY BE TINY (ALTERED IN SMEC)
OL CRYSTALS*
Alteration - COMBINATION ( 2%)
Replacing: PARTLY OL
INCLUDES SMEC+TALC+POSSIBLY SERPENTINE;
SMECTITE ( 2%)
Replacing: GLASS
Vesicles -
Percent: 0
Leg : 70 Top/Bottom Interval(mm): 1240/1260 Describer: Laverne, C.
Hole: 504B Top of Core Depth(m) : 579.50 Rock Type: IGNEOUS
Core: 40 Sample Midpoint(m) : 580.75 Sect/Pc #: 1/PCE 520
ROCK = PLAG-OL MODERATELY PHYRIC BASALT;
Texture: OPHITIC TO INTERSERTAL,MEDIUM TO COARSE GRAINED,
Piece #: IC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 2%)
Size(mm): 1.3X1.0 Morphology: EUHEDRAL
PROBABLY REPLACED, NOW = HOLE;
PLAGIOCLASE ( 5%)
Size(mm): 2.5X1.5 Morphology: SUBHEDRAL
SOMETIMES ZONED;
CLINOPYROXENE ( <1%)
Size(mm): 1.0X.8 Morphology: SUBHEDRAL
TWINNED,ONE PHENO IN THE SECTION*
Groundmass - PLAGIOCLASE ( 40%)
Size(mm): .4X.04 Morphology: LATHS
MANY UNEQUAL SIZES BETWEEN THIS ONE AND PHENOS;
CLINOPYROXENE ( 40%)
Size(mm): .35X.25 Morphology: ANHEDRAL
MAGNETITE ( 3%)
Size(mm): .08X.05 Morphology: SKELETAL
LOCATED IN THE GLASS;
GLASS ( <10%)
INTERSTITIAL TO SILICATES*
Alteration - SMECTITE
Replacing: GLASS AND PROBABLY OL
Vesicles -
Percent: 0
Leg : 70 Top/Bottom Interval(mm): 560/ 580 Describer: Laverne, C.
Hole: 504B Top of Core Depth(m) : 579.50 Rock Type: IGNEOUS
Core: 40 Sample Midpoint(m) : 583.07 Sect/Pc #: 3/PCE 548
ROCK = PLAG-CPX-OL PHYRIC BASALT;
Texture: OPHITIC-INTERSERTAL, MEDIUM TO COARSE GRAINED,
Piece #: IC;
Where sampled: FLOW INTERIOR
Phenocrysts- OLIVINE ( 1%)
Size(mm): .7X.5 Morphology: EUHEDRAL
PROBABLY REPLACED (NOW=HOLE);
PLAGIOCLASE ( 8%)
Size(mm): 1.4X.7 Morphology: SUBHEDRAL LATHS
SOMETIMES ZONED;
CLINOPYROXENE ( 2%)
Size(mm): 1.2X1.2 Morphology: SUBHEDRAL TO ANHEDRAL
TWINNED*
Groundmass - OLIVINE ( 8%)
Size(mm): .08X.05 Morphology: SUBHEDRAL
COMPLETELY REPLACED BY POSSIBLY SMECTITE, IT IS
HARD TO DISTINGUISH FROM THE GLASS;
PLAGIOCLASE ( 35%)
Size(mm): .5X.1 Morphology: SUBHEDRAL LATHS
NUMEROUS UNEQUAL SIZES, ARRANGED IN AN OPHITIC
TEXTURE;
CLINOPYROXENE ( 35%)
Size(mm): .55X.40 Morphology: ANHEDRAL
MAGNETITE ( 5%)
Size(mm): .06X.06 Morphology: EUHEDRAL, SKELETAL MICROLITES
IN GLASSY AREAS;
GLASS ( 6%)
REPLACED BY SMEC*
Alteration - SMECTITE
Replacing: GLASS, OL
IDENTITY UNCERTAIN FOR SMEC AND OL*
Vesicles -
Percent: 0
Leg : 70 Top/Bottom Interval(mm): 1180/1200 Describer: Laverne, C.
Hole: 504B Top of Core Depth(m) : 584.00 Rock Type: IGNEOUS
Core: 41 Sample Midpoint(m) : 585.19 Sect/Pc #: 1/PCE 594
ROCK = PLAG-OL PHYRIC BASALT;
Texture: OPHITIC, SLIGHTLY INTERSERTAL, MEDIUM TO COARSE
GRAINED PHYRIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 7%)
Size(mm): 2.5X1.5 Morphology: EUHEDRAL
PARTLY REPLACED BY VERY PALE GREEN SMEC + TALC;
PLAGIOCLASE ( 8%)
Size(mm): .6X.25 Morphology: SUBHEDRAL LATHS
Groundmass - PLAGIOCLASE ( 36%)
Size(mm): .15X.01 Morphology: SUBHEDRAL LATHS
CLINOPYROXENE ( 35%)
Size(mm): .15X.15 Morphology: ANHEDRAL
PLAG AND CPX BOTH HAVE OPHITIC TEXTURE;
MAGNETITE ( 3%)
Size(mm): .08X.08 Morphology: SKELETAL OR EUHEDRAL
GLASS ( 5%)
REPLACED BY SMECTITE;
SPINEL ( <1%)
Size(mm): .12X.12 Morphology: SUBHEDRAL
Alteration - SMECTITE
Replacing: OL
PALE GREEN,OL PARTLY REPLACED;
TALC
Replacing: OL
Vesicles -
Percent: 0
Leg : 70 Top/Bottom Interval(mm): 210/ 240 Describer: Schrader, E.L.
Hole: 504B Top of Core Depth(m) : 584.00 Rock Type: IGNEOUS
Core: 41 Sample Midpoint(m) : 585.73 Sect/Pc #: 2/PCE 500
ROCK = OL-PLAG-SPINEL PHYRIC BASALT;
Texture: OPHITIC TO INTERSERTAL, MEDIUM GRAINED,PHYRIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 5%)
Size(mm): .5X.5 Morphology: SUBHEDRAL
PLAGIOCLASE ( 5%)
Size(mm): .6X.3 Morphology: BLOCKY LATHS
OFTEN AGGREGATED;
SPINEL ( <<1%)
Morphology: SUBHEDRAL
Groundmass - OLIVINE ( 40%)
Size(mm): .1X.1 Morphology: ANHEDRAL
PLAGIOCLASE ( 40%)
Size(mm): .7X.1 Morphology: LATHS
GLASS ( 5-10%)
REPLACED BY SMECTITE*
Alteration - SMECTITE (10-15%)
Location: SCATTERED Replacing: GLASS,OL
BROWN*
Leg : 70 Top/Bottom Interval(mm): 1120/1150 Describer: Laverne, C.
Hole: 504B Top of Core Depth(m) : 584.00 Rock Type: IGNEOUS
Core: 41 Sample Midpoint(m) : 588.14 Sect/Pc #: 3/PCE 625
ROCK = PLAG-OL PHYRIC BASALT;
Texture: HYALO-OPHITIC, MEDIUM GRAINED,PHYRIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 5%)
Size(mm): .7X.5 Morphology: EUHEDRAL
COMPLETELY REPLACED BY GREEN SMEC + (HOLE);
PLAGIOCLASE ( 8%)
Size(mm): .64X.50 Morphology: EUHEDRAL LATHS
CLINOPYROXENE ( <1%)
Size(mm): .4X.4 Morphology: SUBHEDRAL
Groundmass - OLIVINE ( 3%)
Size(mm): .06X.03 Morphology: SUBHEDRAL
IDENTITY UNCERTAIN FOR OL,
COMPLETELY REPLACED BY GREEN SMEC, (HARD TO
DISTINGUISH FROM GLASS WHEN ANHEDRAL);
PLAGIOCLASE ( 35%)
Size(mm): .16X.02 Morphology: LATHS
CLINOPYROXENE ( 35%)
Size(mm): .08X.08 Morphology: ANHEDRAL
MAGNETITE ( 5%)
Size(mm): .025X.02 Morphology: SKELETAL
GLASS ( 9%)
COMPLETELY REPLACED BY GREEN SMECTITE*
Alteration - SMECTITE
Replacing: OL,GLASS
Vesicles -
Percent: 0
Leg : 70 Top/Bottom Interval(mm): 420/ 430 Describer: Laverne, C.
Hole: 504B Top of Core Depth(m) : 584.00 Rock Type: IGNEOUS
Core: 41 Sample Midpoint(m) : 588.92 Sect/Pc #: 4/PCE 634
ROCK = OL-PLAG MODERATELY PHYRIC BASALT;
Texture: HYALO-OPHITIC, MEDIUM TO COARSE GRAINED,PHYRIC;
Where sampled: FLOW INTERIOR
Phenocrysts- OLIVINE ( 2%)
Size(mm): 1.0X.6 Morphology: EUHEDRAL
COMPLETELY REPLACED BY PALE GREEN SMECTITE AND
POSSIBLY CALCITE + HOLE FROM TS FABRICATIO(;
PLAGIOCLASE ( 2%)
Size(mm): .8X.5 Morphology: BROKEN LATHS
Groundmass - OLIVINE ( 5%)
Size(mm): .06X.04
PLAGIOCLASE ( 20%)
Size(mm): .5X.01 Morphology: LATHS
CLINOPYROXENE ( 17%)
Size(mm): .1X.06 Morphology: ANHEDRAL
FOR PLAG AND CPX, ALL THE RANGES OF SIZE OCCUR
BETWEEN THIS AND THE .008 CRYSTALS COMPRISING SOME
KIND OF "VERY MATURE SHEAF TEXTURE";
MAGNETITE ( 3%)
Size(mm): .01X.01 Morphology: SKELETAL
GLASS ( 5%)
REPLACED BY PALE BROWN GREEN SMECTITE;
COMBINATION ( 40%)
INCLUDES PYX + PLAG, VERY MATURE SHEAF TEXTURE*
Alteration - SMECTITE
Replacing: OL,GLASS
Vesicles -
Percent: 6
Filling: GREENISH SMEC
Shape: IRREGULAR
MIAROLITIC VOIDS AND CRACKS*
Leg : 70 Top/Bottom Interval(mm): 970/ 990 Describer: Laverne, C.
Hole: 504B Top of Core Depth(m) : 593.00 Rock Type: IGNEOUS
Core: 42 Sample Midpoint(m) : 593.98 Sect/Pc #: 1/PCE 653
ROCK = PLAG MODERATELY PHYRIC BASALT;
Texture: SUBOPHITIC (SOME INTERSERTAL AREAS), MEDIUM TO
COARSE GRAINED,PHYRIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( 8%)
Size(mm): 1.2X.5 Morphology: EUHEDRAL,SOME ZONED LATHS
Groundmass - OLIVINE ( 2%)
Size(mm): .2X.25
IDENTITY UNCERTAIN FOR OLIVINE, NOW = HOLE
PLAGIOCLASE ( 35%)
Size(mm): .4X.2 Morphology: SUBHEDRAL LATHS
CLINOPYROXENE ( 45%)
Size(mm): .16X.10 Morphology: ANHEDRAL
ALL PLAG AND CPX XTALS HAVE MANY DIFFERENT SIZES;
MAGNETITE ( 5%)
Size(mm): .08X.06 Morphology: SKELETAL
IN GLASSY AREAS;
GLASS ( 5%)
COMPLETELY REPLACED BY GREEN SMECTITE*
Alteration - SMECTITE
Replacing: GLASS,OL
Vesicles -
Percent: 0
Leg : 70 Top/Bottom Interval(mm): 480/ 510 Describer: Laverne, C.
Hole: 504B Top of Core Depth(m) : 593.00 Rock Type: IGNEOUS
Core: 42 Sample Midpoint(m) : 594.99 Sect/Pc #: 2/PCE 666
ROCK = APHYRIC BASALT;
Texture: OPHITIC-INTERSERTAL,APHYRIC;
Where sampled: FLOW INTERIOR*
Groundmass - OLIVINE ( >5%)
Size(mm): 1.0X.6
COMPLETELY REPLACED BY GREEN SMECTITE AND TALC,
IDENTITY UNCERTAIN FOR SMECTITE AND TALC;
PLAGIOCLASE ( 38%)
Size(mm): 1.2X.16 Morphology: SUBHEDRAL LATHS
CLINOPYROXENE ( 38%)
Size(mm): .5X.4 Morphology: ANHEDRAL
PLAG AND CPX ARE BOTH ARRANGED IN AN OPHITIC TEX;
MAGNETITE ( 4%)
Size(mm): .04 Morphology: SKELETAL
GLASS ( 14%)
REPLACED BY GREEN SMECTITE*
Alteration - SMECTITE
Replacing: OLIVINE
TALC
Replacing: OLIVINE
SMECTITE IS MORE ABUNDANT THAN TALC*
Vesicles -
Percent: 0
Leg : 70 Top/Bottom Interval(mm): 220/ 240 Describer: Schrader, E.L.
Hole: 504B Top of Core Depth(m) : 611.00 Rock Type: IGNEOUS
Core: 44 Sample Midpoint(m) : 611.23 Sect/Pc #: 1/PCE 701
ROCK = PLAG-CPX PHYRIC BASALT;
Texture: VARIOLITIC-HYALOPILITIC, FINE GRAINED,PHYRIC;
Where sampled: GLASSY MARGIN AND NEXT TO GLASSY MARGIN*
Phenocrysts- PLAGIOCLASE (10-15%)
Size(mm): .7X.25 Morphology: LATHS
CLINOPYROXENE ( 1%)
Size(mm): 1X1 Morphology: EUHEDRAL
Groundmass - PLAGIOCLASE ( 10%)
Size(mm): .5X.05 Morphology: SKELETAL LATHS
MAGNETITE ( 3%)
Morphology: SKELETAL
GLASS ( 75%)
REPRESENTED BY VARIOLITIC AND SHEAF TEXTURES*
Leg : 70 Top/Bottom Interval(mm): 880/ 910 Describer: Laverne, C.
Hole: 504B Top of Core Depth(m) : 611.00 Rock Type: IGNEOUS
Core: 44 Sample Midpoint(m) : 613.40 Sect/Pc #: 2/PCE 728
ROCK = PLAG-CPX-OL MODERATELY PHYRIC BASALT;
Texture: HYALOPILITIC, FINE TO MEDIUM GRAINED,PHYRIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 2%)
Size(mm): .6X.16 Morphology: EUHEDRAL
REPLACED BY GREEN SMECTITE AND POSSIBLY TALC;
PLAGIOCLASE ( 3%)
Size(mm): .9X.3 Morphology: SUBHEDRAL LATHS
CLINOPYROXENE ( 3%)
Size(mm): .8X.5 Morphology: SUBHEDRAL (ROUNDED CORNERS)
Groundmass - OLIVINE ( 7%)
Size(mm): .06X.04 Morphology: SUBHEDRAL
REPLACED BY GREEN SMECTITE;
PLAGIOCLASE ( 20%)
Size(mm): .2X.01 Morphology: LATHS
CLINOPYROXENE ( 5%)
Size(mm): .04X.03 Morphology: ANHEDRAL
MAGNETITE ( 5%)
Size(mm): .01X.01 Morphology: SKELETAL
GLASS ( 7%)
COMBINATION ( 45%)
INCLUDES PYX + PLAG, MATURE SHEAF TEXTURE*
Alteration - SMECTITE
Replacing: GLASS, OLIVINE
TALC
Replacing: OLIVINE
IDENTITY UNCERTAIN FOR TALC*
Vesicles -
Size(mm): .25
Percent: 3
Filling: SMECTITE
Shape: IRREGULAR
MIAROLITIC VOIDS*
Leg : 70 Top/Bottom Interval(mm): 1180/1210 Describer: Laverne, C.
Hole: 504B Top of Core Depth(m) : 620.00 Rock Type: IGNEOUS
Core: 45 Sample Midpoint(m) : 621.20 Sect/Pc #: 1/PCE 747
ROCK = PLAG-OL-CPX MODERATELY PHYRIC BASALT;
Texture: HYALO-OPHITIC, MEDIUM-GRAINED, PHYRIC;
Where sampled: FLOW INTERIOR
Phenocrysts- OLIVINE ( 2%)
Size(mm): .6X.4 Morphology: EUHEDRAL
COMPLETELY REPLACED SMECTITE AND CALCITE;
PLAGIOCLASE ( 3%)
Size(mm): .9X.6 Morphology: EUHEDRAL LATHS
SOMETIMES ZONED AND AROUND CRACKS WITH
UNDETERMINABLE FILLING;
CLINOPYROXENE ( <1%)
Size(mm): .4X.3 Morphology: SUBHEDRAL
SOMETIMES ROUNDED*
Groundmass - OLIVINE ( 7%)
Size(mm): .08X.08 Morphology: SUBHEDRAL
IDENTITY UNCERTAIN FOR OL, REPLACED BY SMECTITE;
PLAGIOCLASE ( 22%)
Size(mm): .3X.03 Morphology: LATHS
CLINOPYROXENE ( 22%)
Size(mm): .06X.04 Morphology: ANHEDRAL
MAGNETITE ( 4%)
Size(mm): .01X.015 Morphology: SKELETAL
CHIEFLY IN GLASSY AREA;
GLASS ( 5%)
REPLACED BY SMECTITE;
SPINEL ( <1%)
Size(mm): .04X.04 Morphology: SUBHEDRAL
CORNERS ARE ROUND;
COMBINATION ( 30%)
INCLUDES PYX + PLAG, MATURE SHEAF TEXTURE*
Alteration - COMBINATION
Replacing: OLIVINE,GLASS
INCLUDES CALCITE + SMECTITE*
Vesicles -
Size(mm): .04X.03
Percent: 5
Filling: SMEC,EMPTY
MAY BE OLD SUBHEDRAL ALTERED OLIVINE CRYSTALS;
MIAROLITIC VOIDS*
Leg : 70 Top/Bottom Interval(mm): 800/ 830 Describer: Laverne, C.
Hole: 504B Top of Core Depth(m) : 629.00 Rock Type: IGNEOUS
Core: 46 Sample Midpoint(m) : 629.82 Sect/Pc #: 1/PCE 775
ROCK = OL-PLAG-CPX MODERATELY PHYRIC BASALT;
Texture: HYALO-OPHITIC, FINE TO MEDIUM GRAINED,
SUBGLOMEROPHYRIC;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- OLIVINE ( 3%)
Size(mm): .4X.4 Morphology: SUBHEDRAL
COMPLETELY REPLACED BY SMECTITE;
PLAGIOCLASE ( 2%)
Size(mm): 1.5X.5 Morphology: SUBHEDRAL ZONED LATH
CLINOPYROXENE ( 2%)
Size(mm): 1.5X.5 Morphology: LATHS WHOSE CORNERS ARE ROUND
TWINNED*
Groundmass - OLIVINE ( 2%)
Size(mm): .16X.08 Morphology: SUBHEDRAL
REPLACED BY GREEN SMECTITE;
ALL THE RANGES OF SIZE BETWEEN PHENOCRYSTS AND THE
CRYSTALS OF THE GROUNDMASS OCCUR;
PLAGIOCLASE ( 17%)
Size(mm): .3X.03 Morphology: MICROLITES
CLINOPYROXENE ( 8%)
Size(mm): .08X.08 Morphology: ANHEDRAL
MAGNETITE ( 6%)
Morphology: SKELETAL
OR IN VEINS IN THE CPX VEINS;
COMBINATION ( 70%)
INCLUDES PYX + PLAG,
MATURE TO IMMATURE SHEAF TEXTURE*
Alteration - SMECTITE
Replacing: OLIVINE
Vesicles -
Percent: 0
Leg : 70 Top/Bottom Interval(mm): 550/ 570 Describer: Laverne, C.
Hole: 504B Top of Core Depth(m) : 638.00 Rock Type: IGNEOUS
Core: 47 Sample Midpoint(m) : 640.06 Sect/Pc #: 2/PCE 829
ROCK = PLAG-CPX PHYRIC BASALT;
Texture: SUBVARIOLITIC, FINE GRAINED,SUBGLOMEROPHYRIC;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- OLIVINE
Size(mm): .5X.4 Morphology: EUHEDRAL
TOTALLY REPLACED BY SMECTITE + HOLE;
PLAGIOCLASE ( 7%)
Size(mm): .6X.16 Morphology: EUHEDRAL LATH
CLINOPYROXENE ( 7%)
Size(mm): 3.0X1.0 Morphology: PERFECTLY EUHEDRAL
HOWEVER THE CORNERS OF THE CRYSTALS ARE SURROUNDED
AND OFTEN TWINNED*
Groundmass - OLIVINE ( 1%)
Size(mm): .13X.1 Morphology: EUHEDRAL LATHS
COMPLETELY REPLACED BY SMECTITE;
PLAGIOCLASE ( 6%)
Size(mm): .2X.08 Morphology: MICROLITES
CLINOPYROXENE ( 2%)
Size(mm): .04X.04 Morphology: ANHEDRAL
MAGNETITE ( 7%)
COMBINATION ( 70%)
INCLUDES PYX + PLAG, SUBVARIOLITIC TEXTURE*
Alteration - SMECTITE
Replacing: OLIVINE
Vesicles -
Percent: 0
Leg : 70 Top/Bottom Interval(mm): 420/ 450 Describer: Laverne, C.
Hole: 504B Top of Core Depth(m) : 638.00 Rock Type: IGNEOUS
Core: 47 Sample Midpoint(m) : 642.94 Sect/Pc #: 4/PCE 853
ROCK = PLAG-CPX-OL PHYRIC BASALT;
Texture: MEDIUM TO COARSE GRAINED,SUBGLOMEROPHYRIC,
SUBOPHITIC (TO INTERSERTAL) GROUNDMASS;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 1%)
Size(mm): .5X.3 Morphology: EUHEDRAL
PARTLY REPLACED BY SMECTITE + (HOLE);
PLAGIOCLASE ( 7%)
Size(mm): 1.6X.5 Morphology: SUBHEDRAL LATHS
CLINOPYROXENE ( 7%)
Size(mm): 1.6X1.0 Morphology: EUHEDRAL
PLAG AND CPX OFTEN GATHERED IN THE SAME AREAS*
Groundmass - PLAGIOCLASE ( 35%)
Size(mm): .25X.01 Morphology: MICROLATHS
CLINOPYROXENE ( 35%)
Size(mm): .08X.06 Morphology: ANHEDRAL
MAGNETITE ( 6%)
Size(mm): .05X.03 Morphology: SKELETAL
GLASS ( 6%)
REPLACED BY BROWN GREEN SMECTITE*
Alteration - SMECTITE
Replacing: GLASS
BROWN-GREEN*
Vesicles -
Location: SCATTERED
Filling: EMPTY
Shape: IRREGULAR
VOIDS, MAY BE ANHEDRAL MINERALS GROUND AWAY DURING
THE THIN SECTION FABRICATION*
Leg : 70 Top/Bottom Interval(mm): 460/ 490 Describer: Laverne, C.
Hole: 504B Top of Core Depth(m) : 647.00 Rock Type: IGNEOUS
Core: 48 Sample Midpoint(m) : 647.48 Sect/Pc #: 1/PCE 864
ROCK = CPX-PLAG-OL SPARSELY PHYRIC BASALT;
Texture: FINE TO MEDIUM GRAINED PHYRIC, HYALOPILITIC,
Where sampled: H AN INTERSERTAL GROUNDMASS;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( <1%)
Size(mm): .4X.025 Morphology: SUBHEDRAL
COMPLETELY REPLACED BY BROWN-GREEN SMECTITE;
PLAGIOCLASE ( <1%)
Size(mm): .45X.4 Morphology: SUBHEDRAL LATH
CLINOPYROXENE ( 1%)
Size(mm): 1.5X1.1 Morphology: EUHEDRAL
Groundmass - PLAGIOCLASE ( 40%)
Size(mm): .25X.025 Morphology: SUBHEDRAL LATHS
CLINOPYROXENE ( 35%)
Size(mm): .4X.04 Morphology: ANHEDRAL
MAGNETITE ( 4%)
Size(mm): .015X.015 Morphology: SKELETAL
GLASS ( 5%)
REPLACED BY SMECTITE;
COMBINATION ( 15%)
INCLUDES PYX + PLAG, MATURE SHEAF TEXTURE*
Alteration - SMECTITE
Replacing: OLIVINE,GLASS
BROWN-GREEN*
Vesicles -
Size(mm): 1.2X.7
Percent: 10
Filling: SMEC
Shape: IRREGULAR
MIAROLITIC VOIDS,PARTLY FILLED BY SMEC*
Leg : 70 Top/Bottom Interval(mm): 900/ 920 Describer: Schrader, E.L.
Hole: 504B Top of Core Depth(m) : 647.00 Rock Type: UNIDENTIFIED
Core: 48 Sample Midpoint(m) : 647.91 Sect/Pc #: 1/PCE 869
ROCK = BASALT BRECCIA;
Texture: LITHIC FRAGMENTS ARE GLASSY-VARIOLITIC;
Where sampled: GLASSY MARGIN*
Phenocrysts- OLIVINE ( <1%)
Size(mm): .5X.5 Morphology: SUBHEDRAL-EUHEDRAL
PLAGIOCLASE ( 5%)
Size(mm): 1-.5 Morphology: LATHY
CLINOPYROXENE ( <1%)
Size(mm): .5X.5 Morphology: SUBHEDRAL-ANHEDRAL
Groundmass - GLASS ( 95%)
Alteration - SMECTITE
MATRIX-REPLACES ORIGINAL MATRIX+GLASSY FRAGMENTS*
Leg : 70 Top/Bottom Interval(mm): 750/ 780 Describer: Laverne, C.
Hole: 504B Top of Core Depth(m) : 647.00 Rock Type: IGNEOUS
Core: 48 Sample Midpoint(m) : 649.27 Sect/Pc #: 2/PCE 884
ROCK = PLAG-CPX-OL MODERATELY PHYRIC BASALT;
Texture: HYALO-OPHITIC, FINE GRAINED,PHYRIC;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- OLIVINE ( 1%)
Size(mm): 1.0X.5 Morphology: EUHEDRAL
COMPLETELY REPLACED BY SMEC + UNKNOWN (NOW=HOLE);
PLAGIOCLASE ( 2%)
Size(mm): .9X.7 Morphology: SUBHEDRAL LATHS
CORNERS ARE ROUND;
CLINOPYROXENE ( 1%)
Size(mm): 1.3X.6 Morphology: SUBHEDRAL ELONGATED LATHS
CORNERS ARE ROUND*
Groundmass - OLIVINE ( 2%)
Size(mm): .02X.03 Morphology: EUHEDRAL
OLIVINE ( 2%)
Size(mm): .4X.3 Morphology: EUHEDRAL
UNEQUAL SIZES, COMPLETELY REPLACED BY GREEN SMEC;
PLAGIOCLASE ( 40%)
Size(mm): .12X.01 Morphology: MICROLITES
CLINOPYROXENE ( 17%)
Size(mm): .05X.04 Morphology: ANHEDRAL
MAGNETITE ( 5%)
Size(mm): .01 Morphology: SKELETAL
COMBINATION ( 30%)
INCLUDES PYX + PLAG, MATURE SHEAF TEXTURE*
Alteration - SMECTITE
Replacing: OLIVINE
Vesicles -
Percent: 0
Leg : 70 Top/Bottom Interval(mm): 820/ 850 Describer: Schrader, E.L.
Hole: 504B Top of Core Depth(m) : 647.00 Rock Type: IGNEOUS
Core: 48 Sample Midpoint(m) : 650.84 Sect/Pc #: 3/PCE 902
ROCK = PLAG PHYRIC BASALT;
Texture: MEDIUM GRAINED PHYRIC, SUB-OPHITIC-INTERSERTAL
Where sampled: H PATCHES OF HYALO-OPHITIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( <<1%)
Morphology: SUBHEDRAL
ALTERED;
PLAGIOCLASE ( 15%)
Size(mm): 1X.8 Morphology: EQUANT-BLOCKY
Groundmass - PLAGIOCLASE (25-30%)
Size(mm): .5X.08 Morphology: SKELETAL
CLINOPYROXENE (25-30%)
Size(mm): .3X.3 Morphology: EUHEDRAL
MAGNETITE ( 5-8%)
Morphology: SKELETAL
GLASS ( 25%)
GLASS SEEN AS QUENCH TEXTURES*
Alteration - CLAYS ( 5-10%)
Replacing: GLASS,OLIVINE
Leg : 70 Top/Bottom Interval(mm): 850/ 860 Describer: Schrader, E.L.
Hole: 504B Top of Core Depth(m) : 647.00 Rock Type: IGNEOUS
Core: 48 Sample Midpoint(m) : 650.85 Sect/Pc #: 3/PCE 903
ROCK = APHYRIC BASALT
Texture: HYALO-OPHITIC, FINE-MEDIUM GRAINED,APHYRIC,
VARIOLITIC PATCHES;
Where sampled: NEXT TO GLASSY MARGIN*
Groundmass - OLIVINE ( 10%)
Size(mm): .1X.1
PLAGIOCLASE ( 25%)
Size(mm): .7X.05
GLASS ( 65%)
SEEN AS VARIOLITES*
Alteration - SMECTITE ( 10%)
Location: SCATTERED Replacing: GLASS POCKETS
Leg : 70 Top/Bottom Interval(mm): 140/ 160 Describer: Schrader, E.L.
Hole: 504B Top of Core Depth(m) : 647.00 Rock Type: IGNEOUS
Core: 48 Sample Midpoint(m) : 651.65 Sect/Pc #: 4/PCE 910
ROCK = PLAG-CPX PHYRIC BASALT;
Texture: FINE GRAINED,PHYRIC, VARIOLITIC;
Where sampled: GLASSY MARGIN*
Phenocrysts- PLAGIOCLASE ( 20%)
Size(mm): 1.5X.7 Morphology: EQUANT
CLINOPYROXENE ( <1%)
Size(mm): 1.5X1.5 Morphology: BLOCKY LATHS
PLAG AND CPX ARE FRESH*
Groundmass - MAGNETITE ( <5%)
GLASS ( 80%)
SEEN AS VARIOLITES*
Vesicles -
Percent: 0
Leg : 70 Top/Bottom Interval(mm): 50/ 70 Describer: Schrader, E.L.
Hole: 504B Top of Core Depth(m) : 656.00 Rock Type: IGNEOUS
Core: 49 Sample Midpoint(m) : 659.06 Sect/Pc #: 3/PCE 952
ROCK = PLAG-OL PHYRIC BASALT;
Texture: VARIOLITIC,HYALOPILITIC PATCHES,FINE-GRAINED,
Piece #: IC;
Where sampled: GLASSY MARGIN AND NEXT TO GLASSY MARGIN*
Phenocrysts- OLIVINE ( 1%)
Size(mm): .2X.2 Morphology: EUHEDRAL
ALTERED TO SMECTITE;
PLAGIOCLASE ( 10%)
Size(mm): 1X.3
Groundmass - OLIVINE ( 10%)
Size(mm): .1X.1 Morphology: ANHEDRAL GRAINS
PLAGIOCLASE ( 20%)
Size(mm): .4X.03 Morphology: SKELETAL LATHS
MAGNETITE ( <5%)
GLASS ( 65%)
SEEN IN VARIOLITES AND SHEAF TEXTURES*
Alteration - SMECTITE ( 5-10%)
Location: SCATTERED Replacing: OLIVINE,GLASS
BROWN*
Vesicles -
Percent: 0
Leg : 70 Top/Bottom Interval(mm): 720/ 740 Describer: Laverne, C.
Hole: 504B Top of Core Depth(m) : 669.50 Rock Type: IGNEOUS
Core: 51 Sample Midpoint(m) : 670.23 Sect/Pc #: 1/PCE 980
ROCK = OL-PLAG-CPX MODERATELY PHYRIC BASALT;
Texture: OPHITIC-INTERSERTAL,PHYRIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 4%)
Size(mm): .7X.4 Morphology: EUHEDRAL
COMPLETELY REPLACED BY GREEN SMECTITE AND POSSIBLY
TALC;
PLAGIOCLASE ( 4%)
Size(mm): 1.5X.5 Morphology: SUBHEDRAL LATHS
CLINOPYROXENE ( 1%)
Size(mm): 1.2X.5 Morphology: ANHEDRAL
Groundmass - OLIVINE ( 13%)
Size(mm): .1X.08 Morphology: EUHEDRAL
PLAGIOCLASE ( 35%)
Size(mm): .3X.03 Morphology: SUBHEDRAL LATHS
CLINOPYROXENE ( 30%)
Size(mm): .08X.08 Morphology: ANHEDRAL
FOR PLAG+OL+CPX ALL THE SIZES OCCUR BETWEEN THESE
AND THE PHENOS;
MAGNETITE ( 5%)
Size(mm): .04X.04 Morphology: SKELETAL
IN GLASSY AREAS;
GLASS ( 8%)
REPLACED BY GREEN SMECTITE*
Alteration - SMECTITE
Replacing: OLIVINE,GLASS
GREEN;
TALC
Replacing: OLIVINE
Vesicles -
Percent: 0
Leg : 70 Top/Bottom Interval(mm): 1320/1340 Describer: Laverne, C.
Hole: 504B Top of Core Depth(m) : 678.50 Rock Type: IGNEOUS
Core: 52 Sample Midpoint(m) : 681.33 Sect/Pc #: 2/PCE 1021
ROCK = PLAG-CPX PHYRIC BASALT;
Texture: OPHITIC-INTERSERTAL,PHYRIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( 7%)
Size(mm): 1.2X.2 Morphology: SUBHEDRAL LATHS
THESE CRYSTALS ARE GATHERED IN CLUSTERS (6.0X5.0),
ONE CRYSTAL HAS THE SIZE OF 5.0X2.0 IN THIS
SECTION;
CLINOPYROXENE ( 2%)
Size(mm): 1.6X.6 Morphology: ANHEDRAL
INTERGROWN WITH PLAG LATHS*
Groundmass - OLIVINE ( 5%)
Size(mm): .2X.3
IDENTITY UNCERTAIN FOR OLIVINE,
IF OLIVINE OCCURS IT IS COMPLETELY REPLACED BY
GREEN SMECTITE AS THE GLASS, AND IT IS ANHEDRAL
SO THAT IT IS NOT POSSIBLE TO DISTINGUISH IT;
PLAGIOCLASE ( 38%)
Size(mm): .3X.02 Morphology: SUBHEDRAL LATHS
CLINOPYROXENE ( 37%)
Size(mm): .3X.25 Morphology: ANHEDRAL
INTERGROWN WITH PLAG LATHS;
MAGNETITE ( 4%)
Size(mm): .08X.06 Morphology: SKELETAL
IN GLASSY AREAS CHIEFLY;
GLASS ( 7%)
REPLACED BY GREEN SMECTITE*
Alteration - SMECTITE
Replacing: GLASS,OLIVINE
GREEN,ID UNCERTAIN FOR OL*
Vesicles -
Percent: 2
EXISTENCE OF VESICLES UNCERTAIN*
Leg : 70 Top/Bottom Interval(mm): 620/ 640 Describer: Laverne, C.
Hole: 504B Top of Core Depth(m) : 692.00 Rock Type: IGNEOUS
Core: 54 Sample Midpoint(m) : 692.63 Sect/Pc #: 1/PCE 1065
ROCK = APHYRIC BASALT;
Texture: HYALOPILITIC, APHYRIC;
Where sampled: NEXT TO GLASSY MARGIN;
UNCERTAIN ON LOCATION OF SAMPLING*
Groundmass - OLIVINE ( 3%)
Size(mm): .25X.20 Morphology: SUBHEDRAL
REPLACED BY GREEN SMECTITE;
PLAGIOCLASE ( 10%)
Size(mm): .5X.08 Morphology: LATHS
PLAGIOCLASE
Size(mm): .3X.01 Morphology: MICROLITES
CLINOPYROXENE ( 5%)
Size(mm): .03X.03 Morphology: ANHEDRAL
ALSO FOUND IN SIZE OF .25X.08;
MAGNETITE ( 2%)
Size(mm): .01X.01 Morphology: SKELETAL
SCATTERED MATURE SHEAFS;
COMBINATION ( 80%)
CONTAINS PYX + PLAG, MATURE SHEAF TEXTURE*
Alteration - SMECTITE
Replacing: OLIVINE
GREEN*
Leg : 70 Top/Bottom Interval(mm): 910/ 940 Describer: Laverne, C.
Hole: 504B Top of Core Depth(m) : 692.00 Rock Type: IGNEOUS
Core: 54 Sample Midpoint(m) : 692.92 Sect/Pc #: 1/PCE 1068
ROCK = APHYRIC BASALT;
Texture: APHYRIC,VESICULAR, HYALO-OPHITIC-HYALOPILITIC;
Where sampled: NEXT TO GLASSY MARGIN*
Groundmass - OLIVINE
IDENTITY UNCERTAIN FOR OL;
REPLACED BY POSSIBLY SMECTITE;
PLAGIOCLASE ( 12%)
Size(mm): .4X.03 Morphology: LATHS
CLINOPYROXENE ( 8%)
Size(mm): .05X.04
MAGNETITE ( 3%)
Size(mm): .02X.01 Morphology: SKELETAL
COMBINATION ( 76%)
INCLUDES PYX + PLAG, VERY MATURE SHEAF TEXTURE*
Alteration - SMECTITE
Location: VESICLES Replacing: OLIVINE
ID UNCERTAIN FOR OL*
Vesicles -
Size(mm): .12
Percent: 5
Location: RIM
Filling: SMECTITE
Shape: ROUND
CORE OF FILLING = HOLE*
Leg : 70 Top/Bottom Interval(mm): 400/ 420 Describer: Laverne, C.
Hole: 504B Top of Core Depth(m) : 714.50 Rock Type: IGNEOUS
Core: 57 Sample Midpoint(m) : 714.91 Sect/Pc #: 1/PCE 1130
ROCK = APHYRIC BASALT;
Texture: MEDIUM GRAINED,VESICULAR,APHYRIC,
HYALO-OPHITIC-HYALOPILITIC;
Where sampled: FLOW INTERIOR*
Groundmass - OLIVINE ( 3%)
Morphology: SUBHEDRAL TO ANHEDRAL
IDENTITY UNCERTAIN FOR OL, REPLACED BY SMECTITE;
PLAGIOCLASE ( 35%)
Size(mm): .25X.015 Morphology: MICROLITES
CLINOPYROXENE ( 32%)
Size(mm): .08X.08 Morphology: ANHEDRAL
MAGNETITE ( 4%)
Size(mm): >.02X.02 Morphology: SKELETAL
GLASS ( 8%)
REPLACED BY GREEN-BROWN SMECTITE;
COMBINATION ( 15%)
INCLUDES PYX + PLAG, VERY MATURE SHEAF TEXTURE*
Alteration - SMECTITE
Replacing: GLASS
GREEN-BROWN,ALSO FILLING VESICLES*
Vesicles -
Size(mm): .3
Percent: 3
Location: SCATTERED
Filling: SMECTITE,EMPTY
Shape: ROUND
Leg : 70 Top/Bottom Interval(mm): 1120/1140 Describer: Laverne, C.
Hole: 504B Top of Core Depth(m) : 714.50 Rock Type: IGNEOUS
Core: 57 Sample Midpoint(m) : 718.63 Sect/Pc #: 3/PCE 1178
ROCK = OL SPARSELY PHYRIC BASALT;
Texture: MEDIUM TO COARSE GRAINED,
SUBOPHITIC-INTERGRANULAR,
SUBINTERSERTAL SINCE SOME GLASS OCCURS;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 2%)
Size(mm): 1.2X.8 Morphology: SUBHEDRAL
COMPLETELY REPLACED BY PALE GREEN SMECTITE, RARE
BRIGHT GREEN SMECTITE AND A HOLE FROM THIN SECTION
FABRICATION*
Groundmass - OLIVINE ( 7%)
Size(mm): .25X.25 Morphology: SUBHEDRAL
COMPLETELY REPLACED BY GREEN SMECTITE;
PLAGIOCLASE ( 40%)
Size(mm): .4X.02 Morphology: LATHS
CLINOPYROXENE ( 42%)
Size(mm): .35X.30 Morphology: ANHEDRAL OR SUBHEDRAL
MAGNETITE ( 3%)
Size(mm): .04X.04 Morphology: SKELETAL
GLASS ( 7%)
REPLACED BY SMECTITE*
Alteration - SMECTITE
Replacing: OLIVINE,GLASS
Vesicles -
Percent: 0
Leg : 70 Top/Bottom Interval(mm): 250/ 270 Describer: Laverne, C.
Hole: 504B Top of Core Depth(m) : 723.50 Rock Type: IGNEOUS
Core: 58 Sample Midpoint(m) : 725.26 Sect/Pc #: 2/PCE 1208
ROCK = PLAG-CPX-OL PHYRIC BASALT;
Texture: OPHITIC-INTERGRANULAR,PHYRIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE
IDENTITY UNCERTAIN FOR OL, IF IT OCCURS IT IS
REPLACED BY SMECTITE;
PLAGIOCLASE ( 35%)
Size(mm): .25X.02 Morphology: SUBHEDRAL LATH
CLINOPYROXENE ( 37%)
Size(mm): .15X.15 Morphology: ANHEDRAL
MAGNETITE ( 5%)
Size(mm): .04X.04 Morphology: SKELETAL
GLASS ( 3%)
REPLACED BY GREEN SMECTITE*
Alteration - SMECTITE
Replacing: GLASS,OLIVINE
Leg : 70 Top/Bottom Interval(mm): 970/ 990 Describer: Laverne, C.
Hole: 504B Top of Core Depth(m) : 723.50 Rock Type: IGNEOUS
Core: 58 Sample Midpoint(m) : 727.48 Sect/Pc #: 3/PCE 1235
ROCK = PLAG-CPX-OL PHYRIC BASALT;
Texture: COARSE GRAINED, SUBOPHITIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( <1%)
Size(mm): .8X.4 Morphology: EUHEDRAL
COMPLETELY REPLACED BY SMECTITE;
PLAGIOCLASE ( 8%)
Size(mm): 1.1X.5 Morphology: SUBHEDRAL TO ANHEDRAL
CLINOPYROXENE ( 8%)
Size(mm): 1.8X1.0 Morphology: SUBHEDRAL TO ANHEDRAL
Groundmass - OLIVINE ( 7%)
Size(mm): .2X.15 Morphology: SUBHEDRAL
COMPLETELY REPLACED BY SMECTITE, ALL RANGES OF
SIZES BETWEEN THIS AND THE PHENOS;
PLAGIOCLASE ( 32%)
Size(mm): .25X.03 Morphology: LATHS
CLINOPYROXENE ( 35%)
Size(mm): .2X.2 Morphology: ANHEDRAL
MAGNETITE ( 4%)
Size(mm): .06X.05 Morphology: SKELETAL
GLASS ( 6%)
REPLACED BY SMECTITE*
Alteration - SMECTITE
Replacing: GLASS,OLIVINE
Vesicles -
Percent: 0
Leg : 70 Top/Bottom Interval(mm): 480/ 500 Describer: Laverne, C.
Hole: 504B Top of Core Depth(m) : 741.50 Rock Type: IGNEOUS
Core: 60 Sample Midpoint(m) : 741.99 Sect/Pc #: 1/PCE 1260
ROCK = APHYRIC BASALT;
Texture: MEDIUM GRAINED, INTERGRANULAR-INTERSERTAL;
Where sampled: FLOW INTERIOR*
Groundmass - OLIVINE ( 10%)
Size(mm): .4X.25 Morphology: EUHEDRAL
COMPLETELY REPLACED BY GREEN SMECTITE;
PLAGIOCLASE ( 38%)
Size(mm): .35X.03 Morphology: LATHS
CLINOPYROXENE ( 37%)
Size(mm): .16X.16 Morphology: ANHEDRAL
MAGNETITE ( 5%)
Size(mm): .08X.08 Morphology: SKELETAL
GLASS ( 10%)
REPLACED BY GREEN SMECTITE*
Alteration - SMECTITE
Replacing: GLASS,OLIVINE
GREEN*
Vesicles -
Percent: 0
Leg : 70 Top/Bottom Interval(mm): 410/ 440 Describer: Laverne, C.
Hole: 504B Top of Core Depth(m) : 741.50 Rock Type: IGNEOUS
Core: 60 Sample Midpoint(m) : 743.42 Sect/Pc #: 2/PCE 1275
ROCK = OL-PLAG PHYRIC BASALT;
Texture: MEDIUM GRAINED,SUBGLOMEROPHYRIC, HYALO-OPHITIC-
HYALOPILITIC,PHYRIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 8%)
Size(mm): 1.6X1.0 Morphology: EUHEDRAL
COMPLETELY REPLACED BY YELLOW GREEN SMECTITE AND
POSSIBLY TALC;
PLAGIOCLASE ( 8%)
Size(mm): .4X.1 Morphology: SUBHEDRAL LATHS
GATHERED IN CLUMPS*
Groundmass - OLIVINE ( 7%)
Size(mm): .04X.04 Morphology: SUBHEDRAL
COMPLETELY REPLACED BY YELLOW-GREEN SMECTITE;
ALL THE RANGES OF SIZE BETWEEN THIS AND THE
PHENOS;
PLAGIOCLASE ( 15%)
Size(mm): .2X.02 Morphology: MICROLITES
CLINOPYROXENE ( 15%)
Size(mm): .03X.03 Morphology: ANHEDRAL
MAGNETITE ( 5%)
Size(mm): .01X.01 Morphology: SKELETAL
GLASS
REPLACED BY YELLOW GREEN SMECTITE;
COMBINATION ( 42%)
INCLUDES PYX + PLAG, VERY MATURE SHEAF TEXTURE*
Alteration - SMECTITE
Replacing: OLIVINE
YELLOW GREEN;
SMECTITE
BLUE GREEN, ASSOCIATED WITH YELLOW-GREEN SMECTITE
AND PARTLY FILLING A CRACK, THIS "NEW" TYPE OF
SMECTITE OCCURS ALSO AS A REPLACEMENT OF GLASS,
BUT IT IS RARE*
Leg : 70 Top/Bottom Interval(mm): 300/ 330 Describer: Laverne, C.
Hole: 504B Top of Core Depth(m) : 764.00 Rock Type: IGNEOUS
Core: 63 Sample Midpoint(m) : 767.32 Sect/Pc #: 3/PCE 1360
ROCK = PLAG-OL MODERATELY PHYRIC BASALT;
Texture: MEDIUM GRAINED, HYALO-OPHITIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 2%)
Size(mm): 1.0X.5 Morphology: EUHEDRAL
PARTLY REPLACED BY GREEN SMECTITE AND TALC,
THE CORE OF THE PHENOS ARE STILL FRESH OLIVINE +
OPAQUES;
PLAGIOCLASE ( 5%)
Size(mm): 1.3X.4 Morphology: SUBHEDRAL LATHS
SOMETIMES ZONED OFTEN IN CLUSTERS*
Groundmass - OLIVINE ( 4%)
Size(mm): .06X.3 Morphology: SUBHEDRAL
REPLACED BY GREEN AND PALE GREEN SMECTITE;
PLAGIOCLASE ( 10%)
Size(mm): .02X.2 Morphology: MICROLITES
CLINOPYROXENE ( 5%)
Size(mm): .06X.06 Morphology: ANHEDRAL
MAGNETITE ( 6%)
Size(mm): .04X.04 Morphology: SKELETAL
GLASS ( 8%)
REPLACED BY GREEN SMECTITE;
COMBINATION ( 58%)
INCLUDES PYX + PLAG, VERY MATURE SHEAF TEXTURE*
Alteration - SMECTITE
Replacing: GLASS,OLIVINE
GREEN;
TALC
Replacing: OLIVINE
OPAQUE MINERALS
Replacing: OLIVINE
Vesicles -
Percent: 2
Location: SCATTERED
Filling: GREEN SMECTITE
Shape: IRREGULAR
MIAROLITIC VOIDS*
Leg : 70 Top/Bottom Interval(mm): 450/ 480 Describer: Laverne, C.
Hole: 504B Top of Core Depth(m) : 764.00 Rock Type: IGNEOUS
Core: 63 Sample Midpoint(m) : 768.97 Sect/Pc #: 4/PCE 1395
ROCK = PLAG-OL PHYRIC BASALT;
Texture: MEDIUM TO COARSE GRAINED, SUBOPHITIC-
INTERSERTAL,PHYRIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 6%)
Size(mm): .6X.2 Morphology: EUHEDRAL
COMPLETELY REPLACED BY GREEN SMECTITE, COLORLESS,
SMECTITE AND POSSIBLY A LITTLE TALC;
PLAGIOCLASE ( 8%)
Size(mm): 1.2X.6 Morphology: SUBHEDRAL LATHS
Groundmass - PLAGIOCLASE ( 38%)
Size(mm): .12X.02 Morphology: LATH
CLINOPYROXENE ( 37%)
Size(mm): .12X.1 Morphology: ANHEDRAL
MAGNETITE ( 4%)
Size(mm): .02X.02 Morphology: SKELETAL OR LONG CRYSTALS
IN GLASSY AREAS;
GLASS ( 3%)
REPLACED BY GREEN SMECTITE*
Alteration - SMECTITE
Replacing: OLIVINE,GLASS
GREEN;
SMECTITE
Replacing: OLIVINE
COLORLESS;
TALC
Replacing: OLIVINE
Vesicles -
Size(mm): .8X.2
Percent: 5
Filling: SMECTITE
Shape: IRREGULAR
MIAROLITIC VOIDS,SMECTITE IS GREEN*
Leg : 70 Top/Bottom Interval(mm): 600/ 610 Describer: Laverne, C.
Hole: 504B Top of Core Depth(m) : 764.00 Rock Type: IGNEOUS
Core: 63 Sample Midpoint(m) : 769.10 Sect/Pc #: 4/PCE 1400
ROCK = PLAG-OL PHYRIC BASALT;
Texture: HYALO-OPHITIC, MEDIUM GRAINED,PHYRIC;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- OLIVINE ( 5%)
Size(mm): .6X.5 Morphology: EUHEDRAL
PARTLY REPLACED BY GREEN AND COLORLESS SMECTITE +
OPAQUES;
PLAGIOCLASE ( 12%)
Size(mm): 4X2 Morphology: ROUNDED OR EUHEDRAL LATHS
OFTEN ZONED, ROUNDED LATHS ARE RESORBED;
PLAGIOCLASE
Size(mm): 1.5X.5 Morphology: SUBHEDRAL LATHS
Groundmass - OLIVINE ( 15%)
Size(mm): .1X.1 Morphology: SUBHEDRAL
COMPLETELY REPLACED BY GREEN AND COLORLESS SMEC;
PLAGIOCLASE ( 25%)
Size(mm): .4X.01 Morphology: MICROLITES
CLINOPYROXENE ( 15%)
Size(mm): .06X.06 Morphology: ANHEDRAL
MAGNETITE ( 8%)
Size(mm): .03X.03 Morphology: SKELETAL
GLASS ( 10%)
REPLACED BY DIRTY GREEN SMECTITE;
COMBINATION ( 10%)
INCLUDES PYX + PLAG, VERY MATURE SHEAF TEXTURE*
Alteration - SMECTITE
Replacing: GLASS,OLIVINE
GREEN;
SMECTITE
Replacing: OLIVINE
COLORLESS*
Vesicles -
Percent: 0
Leg : 70 Top/Bottom Interval(mm): 1290/1310 Describer: Laverne, C.
Hole: 504B Top of Core Depth(m) : 773.00 Rock Type: IGNEOUS
Core: 64 Sample Midpoint(m) : 775.80 Sect/Pc #: 2/PCE 1437
ROCK = APHYRIC BASALT;
Texture: HYALOPILITIC-HYALO-OPHITIC, FINE GRAINED;
Where sampled: FLOW INTERIOR OR POSSIBLY NEXT TO GLASSY MARGIN*
Groundmass - OLIVINE ( <2%)
Size(mm): .3X.15 Morphology: SUBHEDRAL
REPLACED BY DARK GREEN SMECTITE AND POSSIBLY TINY
OPAQUES;
PLAGIOCLASE ( 10%)
Size(mm): .32X.02 Morphology: LATH
PLAGIOCLASE
Size(mm): .12X.10 Morphology: LATH
CLINOPYROXENE ( 10%)
Size(mm): .1X.08 Morphology: ANHEDRAL
MAGNETITE ( 6%)
Size(mm): .02X.02 Morphology: SKELETAL
GATHERED BETWEEN THE DIFFERENT "SHEAFS" OF THE
GROUNDMASS;
GLASS ( 5%)
REPLACED BY DIRTY GREEN SMECTITE;
COMBINATION ( 67%)
INCLUDES PYX + PLAG, VERY MATURE SHEAF TEXTURE*
Alteration - SMECTITE
Replacing: GLASS,OLIVINE
DIRTY GREEN*
Vesicles -
Percent: 0
Leg : 70 Top/Bottom Interval(mm): 510/ 530 Describer: Laverne, C.
Hole: 504B Top of Core Depth(m) : 773.00 Rock Type: IGNEOUS
Core: 64 Sample Midpoint(m) : 778.02 Sect/Pc #: 4/PCE 1465
ROCK = PLAG-PYX PHYRIC BASALT;
Texture: COARSE GRAINED,PHYRIC, SUBOPHITIC-INTERSERTAL;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE ( 6%)
Size(mm): 1.2X.5
CLINOPYROXENE ( 6%)
Size(mm): 1.2X.8 Morphology: ANHEDRAL
Groundmass - OLIVINE ( 2%)
Size(mm): .3X.08 Morphology: EUHEDRAL
COMPLETELY REPLACED BY GREEN SMECTITE;
PLAGIOCLASE ( 35%)
Size(mm): .4X.04 Morphology: SUBHEDRAL LATHS
CLINOPYROXENE ( 32%)
Size(mm): .2X.2 Morphology: ANHEDRAL
MAGNETITE ( 4%)
Size(mm): .05X.04 Morphology: SKELETAL, OR LONG CRYSTAL
IN GLASSY AREAS;
GLASS ( 15%)
REPLACED BY GREEN SMECTITE, AND LOCATED IN SOME
AREAS*
Alteration - SMECTITE
Replacing: GLASS,OLIVINE
GREEN*
Vesicles -
Percent: 0
Leg : 70 Top/Bottom Interval(mm): 1230/1250 Describer: Laverne, C.
Hole: 504B Top of Core Depth(m) : 773.00 Rock Type: IGNEOUS
Core: 64 Sample Midpoint(m) : 778.74 Sect/Pc #: 4/PCE 1471
ROCK = PLAG-OL-CPX PHYRIC BASALT;
Texture: MEDIUM GRAINED,HYALO-OPHITIC-HYALOPILITIC,
SUBGLOMEROPHYRIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 4%)
Size(mm): .7X.5 Morphology: EUHEDRAL
REPLACED BY GREEN AND COLORLESS SMECTITE;
PLAGIOCLASE ( 6%)
Size(mm): 1.2X.4 Morphology: EUHEDRAL LATHS
CLINOPYROXENE ( 1%)
Size(mm): 2.0X.5 Morphology: SUBHEDRAL
Groundmass - OLIVINE ( 3%)
Size(mm): .01X.01 Morphology: SUBHEDRAL
REPLACED BY GREEN SMECTITE;
PLAGIOCLASE ( 6%)
Size(mm): .25X.01 Morphology: MICROLITES
CLINOPYROXENE ( 3%)
Size(mm): .06X.05 Morphology: ANHEDRAL
MAGNETITE ( 4%)
Size(mm): .01X.01 Morphology: SKELETAL
COMBINATION ( 73%)
INCLUDES PYX + PLAG, MATURE SHEAF TEXTURE*
Alteration - SMECTITE
Replacing: OLIVINE
GREEN AND COLORLESS*
Vesicles -
Percent: 0
THICK (6MM) VEIN FILLED WITH WHITE TINY CRYSTALS
RADIATED OF ZEOLITE + GREEN SMECTITE + ANOTHER
MINERAL (UNDETERMINABLE BECAUSE TOO THICK)*
Leg : 70 Top/Bottom Interval(mm): 980/1000 Describer: Laverne, C.
Hole: 504B Top of Core Depth(m) : 791.00 Rock Type: IGNEOUS
Core: 66 Sample Midpoint(m) : 791.99 Sect/Pc #: 1/PCE 1500
ROCK = CPX-PLAG-OL MODERATELY PHYRIC BASALT;
Texture: FINE TO MEDIUM GRAINED PHYRIC, HYALO-OPHITIC-
HYALOPILITIC,SUBVARIOLITIC;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- OLIVINE ( 1%)
Size(mm): .30X.2 Morphology: EUHEDRAL
COMPLETELY REPLACED BY GREEN AND COLORLESS SMEC;
PLAGIOCLASE ( 3%)
Size(mm): 1.2X.25 Morphology: EUHEDRAL LATHS
CLINOPYROXENE ( 4%)
Size(mm): 3X1 Morphology: WIDE LATHS, ROUNDED CORNERS
Groundmass - PLAGIOCLASE ( 7%)
Size(mm): .12X.01 Morphology: MICROLITES
CLINOPYROXENE ( 2%)
Size(mm): .04X.04 Morphology: ANHEDRAL
MAGNETITE ( 3%)
Size(mm): <<.008
COMBINATION ( 80%)
INCLUDES PYX + PLAG, SUBVARIOLITIC TO IMMATURE
SHEAF TEXTURE*
Alteration - SMECTITE
Replacing: OLIVINE
GREEN AND COLORLESS*
Vesicles -
Percent: 0
Leg : 70 Top/Bottom Interval(mm): 710/ 730 Describer: Laverne, C.
Hole: 504B Top of Core Depth(m) : 791.00 Rock Type: IGNEOUS
Core: 66 Sample Midpoint(m) : 793.22 Sect/Pc #: 2/PCE 1515
ROCK = APHYRIC BASALT;
Texture: MEDIUM GRAINED,APHYRIC, SUBOPHITIC-INTERSERTAL;
Where sampled: FLOW INTERIOR*
Groundmass - OLIVINE ( 4%)
Size(mm): .16X.16 Morphology: SUBHEDRAL
COMPLETELY REPLACED BY DIRTY GREEN SMECTITE;
PLAGIOCLASE ( 40%)
Size(mm): .3X.02 Morphology: SUBHEDRAL LATHS
CLINOPYROXENE ( 40%)
Size(mm): .25X.25 Morphology: ANHEDRAL
PLAG AND CPX ARRANGED IN A SUBOPHITIC TEXTURE;
MAGNETITE ( 6%)
Size(mm): .08X.08 Morphology: SKELETAL
CHIEFLY IN GLASSY AREAS;
GLASS ( 10%)
REPLACED BY DIRTY GREEN SMECTITE*
Alteration - SMECTITE
Replacing: GLASS,OLIVINE
DIRTY GREEN*
Vesicles -
Percent: 0
Leg : 70 Top/Bottom Interval(mm): 550/ 600 Describer: Laverne, C.
Hole: 504B Top of Core Depth(m) : 800.00 Rock Type: IGNEOUS
Core: 67 Sample Midpoint(m) : 800.58 Sect/Pc #: 1/PCE 1528
ROCK = OL-CPX SPARSELY PHYRIC BASALT;
Texture: FINE TO MEDIUM GRAINED PHYRIC, HYALOPILITIC-
HYALO-OPHITIC;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- OLIVINE ( <1%)
Size(mm): .6X.4 Morphology: EUHEDRAL
COMPLETELY REPLACED BY DIRTY GREEN SMECTITE;
CLINOPYROXENE ( <1%)
Size(mm): .5X.3 Morphology: SUBHEDRAL
Groundmass - PLAGIOCLASE ( 14%)
Size(mm): .6X.02 Morphology: MICROLITES
ISOLATED IN THE GROUNDMASS AND ASSOCIATED WITH
CPX;
CLINOPYROXENE ( 7%)
Size(mm): .2X.2 Morphology: ANHEDRAL
MAGNETITE ( 4%)
Size(mm): .01X.01 Morphology: SKELETAL
GLASS ( 5%)
REPLACED BY GREEN SMECTITE;
COMBINATION ( 70%)
INCLUDES PYX + PLAG, IMMATURE TO MATURE SHEAF TEX*
Alteration - SMECTITE
Replacing: OLIVINE,GLASS
DIRTY GREEN*
Vesicles -
Percent: 0
Leg : 70 Top/Bottom Interval(mm): 660/ 680 Describer: Laverne, C.
Hole: 504B Top of Core Depth(m) : 818.00 Rock Type: IGNEOUS
Core: 69 Sample Midpoint(m) : 818.67 Sect/Pc #: 1/PCE 1544
ROCK = APHYRIC BASALT;
Texture: MEDIUM GRAINED,APHYRIC, SUBOPHITIC-INTERSERTAL;
Where sampled: FLOW INTERIOR*
Groundmass - PLAGIOCLASE ( 40%)
Size(mm): .2X.03 Morphology: LATH
CLINOPYROXENE ( 40%)
Size(mm): .12X.1 Morphology: ANHEDRAL
MAGNETITE ( 10%)
Size(mm): .04X.04 Morphology: SKELETAL
GLASS ( 10%)
REPLACED BY GREEN SMECTITE*
Alteration - SMECTITE
Replacing: GLASS
Vesicles -
Percent: 0
Leg : 70 Top/Bottom Interval(mm): 930/ 940 Describer: Laverne, C.
Hole: 504B Top of Core Depth(m) : 827.00 Rock Type: IGNEOUS
Core: 70 Sample Midpoint(m) : 827.94 Sect/Pc #: 1/PCE 1558
ROCK = PLAG-OL-CPX MODERATELY PHYRIC BASALT;
Texture: FINE TO MEDIUM GRAINED,PHYRIC, INTERGRANULAR;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 1%)
Size(mm): .65X.6 Morphology: EUHEDRAL
PARTLY REPLACED BY GREEN SMECTITE;
PLAGIOCLASE ( 3%)
Size(mm): .8X.5 Morphology: EUHEDRAL LATHS
CLINOPYROXENE ( 1%)
Size(mm): .4X.4 Morphology: SUBHEDRAL
Groundmass - OLIVINE ( 14%)
Size(mm): .08X.08 Morphology: SUBHEDRAL
REPLACED BY SMECTITE (DIRTY GREEN);
PLAGIOCLASE ( 40%)
Size(mm): .16X.02 Morphology: MICROLITES
CLINOPYROXENE ( 35%)
Size(mm): .04X.04 Morphology: ANHEDRAL
THE ARANGEMENT OF THE PLAG AND CPX CRYSTALS COULD
BE SAID "EXTREMELY MATURE SHEAF TEXTURE";
MAGNETITE ( 3%)
Size(mm): .02X.02 Morphology: SKELETAL
GLASS ( 3%)
IDENTITY UNCERTAIN FOR GLASS, REPLACED BY SMEC*
Alteration - SMECTITE
Replacing: GLASS,CHLORITE
Vesicles -
Percent: 0
Leg : 70 Top/Bottom Interval(mm): 160/ 180 Describer: Laverne, C.
Hole: 504B Top of Core Depth(m) : 827.00 Rock Type: IGNEOUS
Core: 70 Sample Midpoint(m) : 828.67 Sect/Pc #: 2/PCE 1564
ROCK = MASSIVE BASALT;
Texture: COARSE GRAINED,OPHITIC, WITH SOME GLASSY AREAS;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 8%)
Size(mm): 2.0X1.8 Morphology: SUBHEDRAL
COMPLETELY REPLACED BY DIRTY GREEN SMECTITE;
PLAGIOCLASE ( 40%)
Size(mm): 1.2X.35 Morphology: EUHEDRAL LATHS
PLAGIOCLASE
Size(mm): .4X.06 Morphology: EUHEDRAL LATHS
CLINOPYROXENE ( 40%)
Size(mm): 1X.8 Morphology: ANHEDRAL
PLAG AND CPX ARE BOTH OPHITIC TEXTURES*
Groundmass - MAGNETITE ( 5%)
Size(mm): .08X.08 Morphology: SKELETAL (OR MICROLITES)
IN GLASSY AREAS;
GLASS ( 7%)
REPLACED BY DIRTY GREEN SMECTITE*
Alteration - SMECTITE
Replacing: GLASS,OLIVINE
GREEN*
Vesicles -
Percent: 0
|
