Leg : 26 Top/Bottom Interval(mm): 270/ 0 Describer: DSDP microfilm
Hole: 257 Top of Core Depth(m) : 263.00 Rock Type: IGNEOUS
Core: 11 Sample Midpoint(m) : 264.77 Sect/Pc #: 2/
ROCK = MEDIUM-GRAINED VESICULAR BASALT
FULL DESCRIPTION OF ALL SITE 257 TS ON
P. 332 OF THE IR;
Texture: MEDIUM-GRAINED,APHYRIC*
Groundmass - OLIVINE ( TR%)
PLAGIOCLASE ( 40%)
PYROXENE ( 15%)
FERROUS OXIDE ( 10%)
GLASS ( 15%)
Vesicles -
Percent: 20
Filling: PALAG,CALCITE
BLACK,GREEN, AND COLORLESS VESICLES,FILLED
WITH DARK OR PALE PALAG, SOME OF IT VIVID GREEN
AND VERMICULAR IN TEXTURE WITH INNER CALCITE
FILLING*
Leg : 26 Top/Bottom Interval(mm): 800/ 0 Describer: DSDP microfilm
Hole: 257 Top of Core Depth(m) : 263.00 Rock Type: IGNEOUS
Core: 11 Sample Midpoint(m) : 265.30 Sect/Pc #: 2/
ROCK = MEDIUM-GRAINED BASALT;
Texture: MEDIUM-GRAINED,APHYRIC*
Groundmass - OLIVINE ( 0.5%)
PLAGIOCLASE ( 36.5%)
PYROXENE ( 32%)
Size(mm): .
FERROUS OXIDE ( 6%)
Size(mm): .
GLASS ( 25%)
Size(mm): .
Vesicles -
Location: 0
Leg : 26 Top/Bottom Interval(mm): 820/ 840 Describer: Kempe, D.
Hole: 257 Top of Core Depth(m) : 263.00 Rock Type: IGNEOUS
Core: 11 Sample Midpoint(m) : 265.33 Sect/Pc #: 2/
ROCK = BASALT
FRESH;
Texture: HYALO-OPHITIC*
Groundmass - PYROXENE
Size(mm): 1.0
PLAGIOCLASE
Size(mm): 1.0
APPROX COMP AN 72*
Leg : 26 Top/Bottom Interval(mm): 290/ 0 Describer: DSDP microfilm
Hole: 257 Top of Core Depth(m) : 263.00 Rock Type: IGNEOUS
Core: 11 Sample Midpoint(m) : 266.29 Sect/Pc #: 3/
ROCK = FINE-GRAINED VESICULAR BASALT;
Texture: FINE-GRAINED*
Groundmass - OLIVINE ( TR%)
AMOUNT IS TOTAL OL IN SECTION;
PLAGIOCLASE ( 40%)
AMOUNT IS TOTAL PLAG IN SECTION;
PYROXENE ( 20%)
AMOUNT IS TOTAL PYX IN SECTION;
FERROUS OXIDE ( 7%)
GLASS ( 25%)
Vesicles -
Percent: 8
Leg : 26 Top/Bottom Interval(mm): 800/ 0 Describer: DSDP microfilm
Hole: 257 Top of Core Depth(m) : 282.00 Rock Type: IGNEOUS
Core: 13 Sample Midpoint(m) : 284.30 Sect/Pc #: 2/
ROCK = GLASSY VESICULAR BASALT;
Texture: GLASSY*
Groundmass - OLIVINE ( TR%)
AMOUNT IS TOTAL OL IN SECTION,ONE VERY
EUHEDRAL XTL (0.5) - FRAMED AND
CRACKED WITH FE.OX AND REPLACED EXCEPTIONALLY
WITH CHRYSOTILE SERP;
PLAGIOCLASE ( 18%)
AMOUNT IS TOTAL PLAG IN SECTION;
PYROXENE ( 5%)
AMOUNT IS TOTAL PYX IN SECTION;
FERROUS OXIDE ( 5%)
GLASS ( 67%)
Alteration - SERPENTINITE
Replacing: OL
CELADONITE
Location: VESICLES
Vesicles -
Percent: 5
Filling: GLASS,CELAD
BLACK OR GREEN, FILLED WITH VERY DARK OPAQUE
GLASS OR VIVID,FIBROUS CELAD WITH A COMPOSITE
SPHERULITIC TEXTURE*
Leg : 26 Top/Bottom Interval(mm): 100/ 0 Describer: DSDP microfilm
Hole: 257 Top of Core Depth(m) : 282.00 Rock Type: IGNEOUS
Core: 13 Sample Midpoint(m) : 285.10 Sect/Pc #: 3/
ROCK = FINE-GRAINED VESICULAR BASALT;
Texture: FINE-GRAINED*
Groundmass - OLIVINE ( 0%)
PLAGIOCLASE ( 25%)
AMOUNT IS TOTAL PLAG IN SECTION;
PYROXENE ( 24%)
AMOUNT IS TOTAL PYX IN SECTION;
FERROUS OXIDE ( 8%)
GLASS ( 35%)
Vesicles -
Percent: 8
Leg : 26 Top/Bottom Interval(mm): 220/ 0 Describer: DSDP microfilm
Hole: 257 Top of Core Depth(m) : 290.00 Rock Type: IGNEOUS
Core: 14 Sample Midpoint(m) : 294.72 Sect/Pc #: 4/
ROCK = GLASSY PHYRIC BASALT;
Texture: GLASSY,PHYRIC*
Groundmass - OLIVINE ( 1%)
AMOUNT IS TOTAL OL IN SECTION;
PLAGIOCLASE ( 37%)
AMOUNT IS TOTAL PLAG IN SECTION;
PYROXENE ( 22%)
AMOUNT IS TOTAL PYX IN SECTION;
COMBINATION ( 40%)
INCLUDES FE.OX+GLASS*
Vesicles -
Percent: 0
Leg : 26 Top/Bottom Interval(mm): 1240/1260 Describer: Kempe, D.
Hole: 257 Top of Core Depth(m) : 290.00 Rock Type: IGNEOUS
Core: 14 Sample Midpoint(m) : 295.75 Sect/Pc #: 4/
ROCK = BASALT
FRESH;
Texture: SUBOPHITIC,PORPHYRITIC*
Phenocrysts- PLAGIOCLASE
Size(mm): 4.0
APPROX COMP AN90*
Groundmass - OLIVINE
Size(mm): .8
ALTERED,RARE;
PYROXENE
Size(mm): 1.5
PLAGIOCLASE
Size(mm): .8
APPROX COMP AN74*
Leg : 26 Top/Bottom Interval(mm): 1250/ 0 Describer: DSDP microfilm
Hole: 257 Top of Core Depth(m) : 290.00 Rock Type: IGNEOUS
Core: 14 Sample Midpoint(m) : 295.75 Sect/Pc #: 4/
ROCK = MEDIUM-GRAINED PHRYIC OL BASALT;
Texture: MEDIUM-GRAINED,PHYRIC*
Groundmass - OLIVINE ( 4%)
AMOUNT IS TOTAL OL IN SECTION;
PLAGIOCLASE ( 38%)
AMOUNT IS TOTAL PLAG IN SECTION;
PYROXENE ( 37%)
AMOUNT IS TOTAL PYX IN SECTION;
FERROUS OXIDE ( 8%)
GLASS ( 13%)
Vesicles -
Percent: 0
Leg : 26 Top/Bottom Interval(mm): 1260/1280 Describer: Kempe, D.
Hole: 257 Top of Core Depth(m) : 298.00 Rock Type: IGNEOUS
Core: 15 Sample Midpoint(m) : 299.27 Sect/Pc #: 1/
ROCK = BASALT
FRESH;
Texture: SUBOPHITIC,PORPHYRITIC*
Groundmass - PYROXENE
Size(mm): .7
PLAGIOCLASE
Size(mm): 2.5
APPROX COMP AN86*
Leg : 26 Top/Bottom Interval(mm): 940/ 960 Describer: Kempe, D.
Hole: 257 Top of Core Depth(m) : 307.50 Rock Type: IGNEOUS
Core: 16 Sample Midpoint(m) : 309.95 Sect/Pc #: 2/
ROCK = BASALT
FRESH;
Texture: SUBOPHITIC,PORPHYRITIC*
Phenocrysts- PLAGIOCLASE
Size(mm): 4.5
APPROX COMP AN91-63*
Groundmass - PLAGIOCLASE
Size(mm): .8
APPROX COMP AN75*
Leg : 26 Top/Bottom Interval(mm): 1000/ 0 Describer: DSDP microfilm
Hole: 257 Top of Core Depth(m) : 307.50 Rock Type: IGNEOUS
Core: 16 Sample Midpoint(m) : 310.00 Sect/Pc #: 2/
ROCK = MEDIUM-GRAINED PORPHYRITIC OL BASALT;
Texture: MEDIUM-GRAINED,PHYRIC*
Groundmass - OLIVINE ( 6%)
AMOUNT IS TOTAL OL IN SECTION;
PLAGIOCLASE ( 37%)
AMOUNT IS TOTAL PLAG IN SECTION;
PYROXENE ( 36%)
AMOUNT IS TOTAL PYX IN SECTION;
FERROUS OXIDE ( 6%)
GLASS ( 15%)
Vesicles -
Percent: 0
Leg : 26 Top/Bottom Interval(mm): 650/ 670 Describer: Kempe, D.
Hole: 257 Top of Core Depth(m) : 317.00 Rock Type: IGNEOUS
Core: 17 Sample Midpoint(m) : 323.66 Sect/Pc #: 5/
ROCK = BASALT
FRESH;
Texture: HYALO-OPHITIC,SUB-VARIOLITIC*
Groundmass - OLIVINE
Size(mm): .5
ALTERED,RARE;
PYROXENE
Size(mm): .7
PLAGIOCLASE
Size(mm): 1.2
APPROX COMP AN76*
Leg : 26 Top/Bottom Interval(mm): 660/ 0 Describer: DSDP microfilm
Hole: 257 Top of Core Depth(m) : 317.00 Rock Type: IGNEOUS
Core: 17 Sample Midpoint(m) : 323.66 Sect/Pc #: 5/
ROCK = MEDIUM-GRAINED SPHERULITIC OL BASALT;
Texture: MEDIUM-GRAINED SPHERULITIC*
Groundmass - OLIVINE ( 3%)
AMOUNT IS TOTAL OL IN SECTION;
PLAGIOCLASE ( 32%)
AMOUNT IS TOTAL PLAG IN SECTION;
PYROXENE ( 42%)
AMOUNT IS TOTAL PYX IN SECTION;
FERROUS OXIDE ( 5%)
GLASS ( 18%)
Vesicles -
Percent: 0
|
