Leg : 92 Top/Bottom Interval(mm): 330/ 350 Describer: Goldberg, D.
Hole: 601B Top of Core Depth(m) : 14.40 Rock Type: IGNEOUS
Core: 1 Sample Midpoint(m) : 20.39 Sect/Pc #: CC/PCE 1
ROCK = CPX-PLAG PHYRIC BASALT
PROBABLY FERROBASALT;
Texture: PHYRIC, SPHERULITIC GROUNDMASS;
Where sampled: SECTION IN FROM EDGE WITH POSSIBLE GLASS
ROCK = NANTS*
Phenocrysts- OLIVINE ( 5-10%)
Size(mm): 0.1-0.5 Morphology: GRAINS, SOME SKELETAL
PARTLY ALTERED;
PLAGIOCLASE (50-70%)
Size(mm): 0.05-0.8 Morphology: LATHS, STUBBY, SKELETAL
TWINNED, PLAG-CPX FORM CLUSTERS, ALSO ISOLATED;
CLINOPYROXENE (30-40%)
Size(mm): 0.05-1 Morphology: ANHEDRAL GRAINS
PLAG-CPX FORM CLUSTERS, ALSO ISOLATED, ALL PHENOS
ARE MICROPHENOS, 7-15 PERCENT OF ROCK*
Groundmass - MAGNETITE (15-20%)
Size(mm): CA. 0.005
EXTREMELY ABUNDANT, PERCENTAGE VERY DIFFICULT TO
DETERMINE, DISSEMINATED IN AND AROUND SPHERULITES;
OTHER (80-85%)
Morphology: SPHERULITES
SPHERULITES, COALESCED SPHERULITES, PROBABLY PLAG+
CPX, ALMOST OPAQUE, VISIBLE ON THIN EDGE*
Vesicles -
Size(mm): <1
Percent: 0.5
Filling: NONE
Shape: ROUND
ONLY ONE SEEN*
Alteration - IDDINGSITE
Replacing: OL
PERCENTAGE AS OL*
Leg : 92 Top/Bottom Interval(mm): 430/ 450 Describer: Goldberg, D.
Hole: 601B Top of Core Depth(m) : 24.00 Rock Type: IGNEOUS
Core: 2 Sample Midpoint(m) : 24.44 Sect/Pc #: 1/PCE 5
ROCK = CPX-PLAG PHYRIC BASALT
PROBABLY FERROBASALT;
Texture: PHYRIC, SPHERULITIC GROUNDMASS;
Phenocrysts- OLIVINE ( 5-10%)
Size(mm): 0.2-0.5 Morphology: EUHEDRAL TO SUBHEDRAL
MOSTLY ALTERED, FORMS CLUSTERS WITH PLAG, ALSO
INDIVIDUAL GRAINS;
PLAGIOCLASE (60-80%)
Size(mm): 0.1-1.3 Morphology: LATHS, STUBBY, SKELETAL
TWINNED, FORMS CLUSTERS WITH OL AND WITH PYX, ALSO
INDIVIDUAL GRAINS;
CLINOPYROXENE (20-30%)
Size(mm): 0.2-1.6 Morphology: ANHEDRAL TO SUBHEDRAL
FORM CLUSTERS WITH PLAG, ALSO INDIVIDUAL GRAINS,
PHENOS COMPOSE 5-15 PERCENT OF TOTAL GROUNDMASS*
Groundmass - MAGNETITE (15-20%)
Size(mm): CA. 0.005
EXTREMELY ABUNDANT, PERCENTAGE VERY DIFFICULT TO
DETERMINE, DISSEMINATED;
OTHER (80-85%)
Morphology: SPHERICAL
COALESCED SPHERULITES, PROBABLY PLAG+CPX, OPAQUE
DUE TO MAGN POSSIBLY, VISIBLE ON THIN EDGE*
Alteration - IDDINGSITE
Replacing: OL
PERCENTAGE AS OL*
Leg : 92 Top/Bottom Interval(mm): 970/ 990 Describer: Goldberg, D.
Hole: 601B Top of Core Depth(m) : 24.00 Rock Type: IGNEOUS
Core: 2 Sample Midpoint(m) : 24.98 Sect/Pc #: 1/PCE 11
ROCK = CPX-PLAG PHYRIC BASALT
PROBABLY FERROBASALT;
Texture: PHYRIC,SUBSPHERULITIC TO INTERSERTAL GROUNDMASS;
Where sampled: ACROSS PCE WITH ALTERED RIM CA. 1CM WIDE, FRESHER
INTERIOR*
Phenocrysts- PLAGIOCLASE (50-60%)
Size(mm): 0.5-1.5 Morphology: LATHS
TWINNED, FRACTURED, FORM CLUSTERS+ISOLATED GRAINS;
CLINOPYROXENE (40-50%)
Size(mm): 0.5-1.5 Morphology: ANHEDRAL GRAINS
FORM CLUSTERS AND ISOLATED GRAINS, PHENOS MAKE UP
10-15 PERCENT OF TOTAL*
Groundmass - MAGNETITE (10-20%)
Size(mm): TO 0.01
ONE INTENSE DARK BAND CONTAINS MUCH MORE, POSSIBLY
UP TO 25 PERCENT, DISSEMINATED, IN ALTERED ZONE
SURROUNDED BY FE.OXIDE STAINS;
GLASS ( 1-5%)
YELLOW, ALTERING TO RED OR ORANGE-BROWN, ONLY
APPARENT IN OUTER ZONE;
OTHER (75-85%)
Size(mm): TO AC. 0.5 Morphology: FAN, SHEAF, SUBSPHERICAL
FIBERS ARE CPX+PLAG, COALESCED AND RELATIVELY
COARSE, VERGING ON MESH TEXTURE*
Vesicles -
Size(mm): 0.2-0.5
Percent: 1-2
Location: CENTRAL PART
Filling: EMPTY
Shape: SQUARE TO
Location: OF PIECE
Shape: ROUNDED
OCCASIONALLY LINED WITH GLASS*
Alteration - OTHER
Location: OUTER ALTERED Replacing: MAGN
Location: ZONES
RUSTIER OXIDES*
Leg : 92 Top/Bottom Interval(mm): 320/ 340 Describer: Goldberg, D.
Hole: 601B Top of Core Depth(m) : 25.50 Rock Type: IGNEOUS
Core: 3 Sample Midpoint(m) : 25.83 Sect/Pc #: 1/PCE 4
ROCK = CPX-PLAG SP PHYRIC BASALT
PROBABLY FERROBASALT;
Texture: SP PHYRIC, SUBSPHERULITIC TO INTERSERTAL
GROUNDMASS;
Phenocrysts- PLAGIOCLASE (65-75%)
Size(mm): 0.3-1 Morphology: LATHS
TWINNED, FORM CLUSTERS AS WELL AS ISOLATED GRAINS;
CLINOPYROXENE (25-35%)
Size(mm): 0.1-0.5 Morphology: ANHEDRAL+SUBHEDRAL GRAINS
FORM CLUSTERS AS WELL AS ISOLATED GRAINS, PHENOS
ARE MICROPHENOS, COMPOSE 7-15 PERCENT OF TOTAL*
Groundmass - MAGNETITE (10-15%)
Size(mm): 0.01-0.05
DISSEMINATED;
GLASS (CA. 5%)
YELLOW ALTERING TO ORANGE BROWN;
OTHER (80-85%)
Morphology: FAN, SHEAF, SUBSPHERICAL
SPHERULITES, PROBABLY MOSTLY PLAG+SOME CPX,
COARSER ONES GRADE UP TOWARD MICROPHENOS, TEX
APPROACHES MESH*
Alteration - CLAYS
Location: ONE EDGE Replacing: SPHERULITES
ID UNCERTAIN, BROWN*
PALAGONITE
Location: ALONG ONE Replacing: GLASS
Location: EDGE
PERCENTAGE SAME AS GLASS*
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