Leg : 26 Top/Bottom Interval(mm): 1000/1020 Describer: McKelvey, B.C.
Hole: 250A Top of Core Depth(m) : 718.50 Rock Type: IGNEOUS
Core: 25 Sample Midpoint(m) : 719.51 Sect/Pc #: 1/
ROCK = OLIVINE BASALT
UNCERTAIN ABOUT SAMPLE LOCATION - SUBBOTTOM
DEPTH IS 725.3M,ROCK IS WEATHERED;
Texture: FINE-GRAINED,GLASSY,PLAG MICROPHYRIC,
DEVITRIFIED,SUBVARIOLITIC*
Phenocrysts- PLAGIOCLASE
Size(mm): 0.7 Morphology: LATHS,RADIATING
LABRADORITE,FELD LATHS SHOW SLIGHT ZONING*
Groundmass - PLAGIOCLASE
Size(mm): 0.1 Morphology: LATHS,RADIATING,MICROLITES
OLIVINE
Size(mm): 0.2
OCCASIONAL XTLS COMPLETELY ALTERED TO
IDDINGSITE-BOWLINGITE AGGREGATES;
PYROXENE
A FEW GRAINS;
FERROUS OXIDE
Morphology: GRANULES
MAGNETITE?, NUMEROUS;
MATRIX
LARGELY DEVITRIFIED SUBVARIOLITIC REDDISH-
BROWN MATRIX CONTAINING DARK DENDRITIC
CRYSTALLITES*
Alteration - IDDINGSITE
Replacing: OL
BOWLINGITE
Replacing: OL
CELADONITE
MICROCRYSTALLINE PATCHES,PLEOCHROIC FROM
PALE GREEN TO GREENISH-YELLOW AND HAS A
RADIATING HABIT*
Vesicles -
Filling: CELAD
SCATTERED VESICLES, IN VESICLES THE GREEN
MINERAL IS ENCLOSED WITHIN A CHLORITIC
MESOSTASIS*
Leg : 26 Top/Bottom Interval(mm): 1200/1220 Describer: McKelvey, B.C.
Hole: 250A Top of Core Depth(m) : 718.50 Rock Type: IGNEOUS
Core: 25 Sample Midpoint(m) : 719.71 Sect/Pc #: 1/
ROCK = OLIVINE BASALT
UNCERTAIN ABOUT SAMPLE LOCATION - SUBBOTTOM
DEPTH IS 725.5;
Texture: COARSE, OPHITIC,PYX-PLAG-OL PHYRIC*
Phenocrysts- PYROXENE ( 34%)
Size(mm): TO 1.2
CLOVE-BROWN TITANIFEROUS PYX (2V GAMMA CA 45
DEGREES),LONG XTLS (UP TO 1.2MM) SUBOPHITICALLY
ENCLOSE LABRADORITE PLAG;
PLAGIOCLASE
Size(mm): TO 0.9
LONG, NARROW, ZONED LATHS;
OLIVINE
Size(mm): 0.6 Morphology: EUHEDRAL
COMPLETELY ALTERED AND PSEUDOMORPHED BY A
GREENISH BOWLINGITE AGGREGATE*
Groundmass - ILMENITE
Size(mm): TO 0.4 Morphology: SKELETAL
PLAGIOCLASE
SLIGHTLY SAUSSURITIZED INTERSTITIAL;
MESOSTASIS
REMAINDER OF ROCK CONSISTS OF CHLORITE-SERP
MESOSTASIS,STUDDED WITH GRAINS AND MINUTE RODS
OF ILMENITE, NO EVIDENCE OF QUARTZ-ALKALI FELD
MESOSTASIS*
Alteration - BOWLINGITE
Replacing: OL
CHLORITE
Location: MESOSTASIS
SERPENTINITE
Location: MESOSTASIS
CARBONATE
POOLS*
Leg : 26 Top/Bottom Interval(mm): 440/ 460 Describer: McKelvey, B.C.
Hole: 250A Top of Core Depth(m) : 729.00 Rock Type: IGNEOUS
Core: 26 Sample Midpoint(m) : 735.45 Sect/Pc #: 5/
ROCK = OLIVINE BASALT
UNCERTAIN ABOUT SAMPLE LOCATION,SUBBOTTOM
DEPTH IS 736.9 M;
Texture: INTERSERTAL*
Phenocrysts- PLAGIOCLASE
Size(mm): 0.1-1.0 Morphology: LATHS,TABULAR
ZONED;
PYROXENE
Size(mm): 0.5 Morphology: LATHS,GRAINS
PLAG ENMESHED WITH LATHS (0.5MM), AND SMALLER
GRAINS OF PYX*
Groundmass - OLIVINE
Size(mm): TO 0.2
COMPLETELY ALTERED TO IDDINGS-BOWLINGITE;
ILMENITE
Morphology: SKELETAL,RODS,GRAINS
SCATTERED THROUGHOUT ESPECIALLY AMONG THE
PYX AND INTERSTITIAL CHLORITE-SERP MESOSTASIS;
MESOSTASIS
Alteration - IDDINGSITE
Replacing: OL
SERPENTINITE
Replacing: OL
SERPENTINITE
Location: MESOSTASIS
CHLORITE
Location: MESOSTASIS
HEMATITE
BLEBS AND SKELETAL XTLS;
CELADONITE
Location: VESICLES,
Location: VEINS
GREEN PLEOCHROIC;
CARBONATE
Vesicles -
Percent: RARE
Filling: CELAD,CARB,SERP
RARE VESICLES AND VEINS*
Leg : 26 Top/Bottom Interval(mm): 450/ 470 Describer: Kempe, D.
Hole: 250A Top of Core Depth(m) : 729.00 Rock Type: IGNEOUS
Core: 26 Sample Midpoint(m) : 736.96 Sect/Pc #: 6/
ROCK = BASALT
FRESH, SOURCE IS IR FOR LEG 26 THIN SECTIONS
DESCRIBED BY D.R.C. KEMPE;
Texture: SUBOPHITIC*
Groundmass - OLIVINE
Size(mm): .6
ALTERED,COMMON;
PYROXENE
Size(mm): 1.2
PLAGIOCLASE
Size(mm): .9
APPROX COMP AN74,ALL LEG 26 SIZES ARE FOR MAX.*
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