Leg : 29 Top/Bottom Interval(mm): 350/ 430 Describer: Ridley, W.
Hole: 282 Top of Core Depth(m) : 294.00 Rock Type: IGNEOUS
Core: 18 Sample Midpoint(m) : 297.39 Sect/Pc #: 3/
ROCK = BASALT
HIGHLY ALTERED;
Texture: FINE-GRAINED,RADIATE
GROUNDMASS HIGHLY ALTERED BUT ORIGINAL RADIATE
TEXTURE HAS BEEN PRESERVED*
Groundmass - FELDSPAR
Morphology: LATHS
SMALL,HAVE GREENISH CORES OF SERICITE AND
INTERSTITIAL PATCHES OF EPIDOTE AND CHLORITE;
OPAQUE MINERALS ( 3-4%)
Size(mm): .1-.5
OXIDIZED,ID UNCERTAIN,WITH CRENULATE MARGINS;
OLIVINE
REPLACED BY SERPENTINE*
Alteration - SERPENTINITE ( 2%)
Replacing: OL
UP TO 1MM IN SIZE-AVERAGE .3MM,FREQUENTLY CONTAINS
REDDISH-BROWN GRAINS OF CHROME SPINEL;
CLAY MINERALS
Replacing: FELDSPAR
INCLUDES SERICITE,EPIDOTE AND CHLORITE*
Leg : 29 Top/Bottom Interval(mm): 1260/1340 Describer: Ridley, W.
Hole: 282 Top of Core Depth(m) : 298.00 Rock Type: IGNEOUS
Core: 19 Sample Midpoint(m) : 299.30 Sect/Pc #: 1/
ROCK = BASALT;
Texture: FINE-GRAINED,INTERSERTAL*
Groundmass - PLAGIOCLASE
Size(mm): .2-.3 Morphology: LATHS
PYROXENE
VERY FINE GRAINED,SUBRADIATE;
TITANOMAGNETITE
INTERGROWN WITH PYX*
Alteration - IDDINGSITE
Replacing: OL
RARE PSEUDOMORPHS OF ANTIGORITE-IDDINGSITE
INTERGROWTHS AFTER MICROPHENO OL;
SERPENTINITE
Replacing: GLASS
IRREGULAR AREAS,PROBABLY ORIGINALLY GLASS,ARE NOW
ALTERED TO SPHERULITE-LIKE,LAYERED INTERGROWTHS
OF IDDINGSITE AND SERPENTINE?*
Leg : 29 Top/Bottom Interval(mm): 450/ 530 Describer: Ridley, W.
Hole: 282 Top of Core Depth(m) : 307.00 Rock Type: IGNEOUS
Core: 20 Sample Midpoint(m) : 310.49 Sect/Pc #: 3/
ROCK = PLAG MODERATELY MICROPHYRIC BASALT;
Texture: MODERATELY MICROPHYRIC,FINE-GRAINED,SUBTRACHYTIC
WITH FLOWAGE ALIGNMENT OF SMALL PLAG LATHS*
Phenocrysts- PLAGIOCLASE ( 5%)
Size(mm): .5
AVERAGE SIZE GIVEN,RARE GRAINS UP TO 1.5MM,CORES
REPLACED BY CHLORITE AND CALCITE,PHENOS ASSOCIATED
WITH IDDINGSITIZED OL PSEUDOMOPRHS CONTAINING
REDDISH-BROWN SPINEL*
Groundmass - OLIVINE
PSEUDOMORPHED BY IDDINGSITE;
PLAGIOCLASE
PYROXENE
INTERSTITIAL AREAS TO LATHS CONTAIN "HERRINGBONE" PYX NUCLEATED ON PLAG,SUBSEQUENTLY ALTERED TO A
REDDISH-BROWN MINERAL*
Alteration - IDDINGSITE
Replacing: OL
CALCITE
Location: VEINS
SECONDARY VEINS OF PLATY CALCITE CUT THROUGH ROCK*
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