Leg : 62 Top/Bottom Interval(mm): 310/ 330 Describer: Vallier, T.
Hole: 465A Top of Core Depth(m) : 409.50 Rock Type: UNIDENTIFIED
Core: 40 Sample Midpoint(m) : 412.82 Sect/Pc #: 3/PCE 1C
ROCK = TRACHYTE
VOLCANIC BRECCIA;
Texture: MODERATELY PORPHYRITIC,HYALOPILITIC-PILOTAXITIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- OLIVINE ( 0.2%)
Size(mm): 0.1-0.2 Morphology: EUHEDRAL
RARE,PSEUDOMORPHED BY CLAY;
PLAGIOCLASE ( 8.0%)
Size(mm): 0.25-0.75 Morphology: EUHEDRAL
PARTLY ALTERED TO CLAY MINS*
Groundmass - OLIVINE ( 0%)
PLAGIOCLASE ( 15.4%)
MOSTLY MICROLITES;
CLINOPYROXENE ( 0%)
OPAQUE MINERALS ( 3.0%)
INCLUDES MAGN + ILMENITE;
GLASS ( 73.4%)
REPLACED BY CLAY MINS,PERCENTAGES OBTAINED BY
POINT COUNT (500 POINTS)*
Alteration - CLAY MINERALS
Location: GROUNDMASS Replacing: GLASS,FEL
EXTENSIVE,SOME FELDSPARS*
Leg : 62 Top/Bottom Interval(mm): 300/ 320 Describer: Windom, K.
Hole: 465A Top of Core Depth(m) : 419.00 Rock Type: UNIDENTIFIED
Core: 41 Sample Midpoint(m) : 419.31 Sect/Pc #: 1/PCE 3
ROCK = TRACHYTE
VOLCANIC BRECCIA;
Texture: HYALOPILITIC*
Phenocrysts- OLIVINE ( 0%)
PLAGIOCLASE ( 8.0%)
Size(mm): 0.04-0.2 Morphology: LATHS
MICROPHENOS,LARGER XTLS ARE ZONED;
CLINOPYROXENE ( 0%)
SPINEL ( 0%)
Groundmass - PLAGIOCLASE ( 12.3%)
Morphology: LATHS
WISPY LATHS,MICROLITES;
MAGNETITE ( 1.2%)
GLASS
SEE CLAY.MIN,PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - CARBONATE ( 0.2%)
Location: VEINS
CLAY MINERALS ( 76.5%)
Replacing: GLASS
Vesicles -
Percent: 1.8
Filling: CLAY.MIN
Shape: IRREGULAR
Leg : 62 Top/Bottom Interval(mm): 750/ 780 Describer: Windom, K.
Hole: 465A Top of Core Depth(m) : 419.00 Rock Type: UNIDENTIFIED
Core: 41 Sample Midpoint(m) : 419.77 Sect/Pc #: 1/PCE 7A
ROCK = TRACHYTE
VOLCANIC BRECCIA;
Texture: MODERATELY PORPHYRITIC,HYALOPILITIC;
Where sampled: CLAST IN BRECCIA*
Phenocrysts- OLIVINE ( 0%)
PLAGIOCLASE ( 6.2%)
Size(mm): 0.1-1.0 Morphology: LATHS
ONE XTL IS SECTOR ZONED;
CLINOPYROXENE ( 0%)
SPINEL ( 0%)
Groundmass - OLIVINE ( 0%)
PLAGIOCLASE ( 26.8%)
MICROLITES;
CLINOPYROXENE ( 0%)
MAGNETITE ( 1.2%)
ILMENITE ( 0%)
GLASS
SEE CLAY.MIN;
ORTHOPYROXENE ( 0%)
QUARTZ ( 0%)
ALKALI FELDSPAR ( 0%)
PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - CARBONATE ( 0.1%)
CLAY MINERALS ( 65.7%)
Replacing: GLASS
Leg : 62 Top/Bottom Interval(mm): 190/ 210 Describer: Seifert, K.
Hole: 465A Top of Core Depth(m) : 419.00 Rock Type: IGNEOUS
Core: 41 Sample Midpoint(m) : 420.70 Sect/Pc #: 2/PCE 2D
ROCK = TRACHYTE;
Texture: APHYRIC,PILOTAXITIC;
Where sampled: FLOW INTERIOR*
Phenocrysts- PLAGIOCLASE
MICROPHENOS*
Groundmass - PLAGIOCLASE
2 GENERATIONS OF PLAG;
OPAQUE MINERALS ( >1%)
INCLUDES MAGN + ILMENITE*
Alteration - CARBONATE
Location: VEINS
PRESENT IN VEINS;
CLAY MINERALS
Replacing: GLASS
MOSTLY ALTERED GLASS*
Leg : 62 Top/Bottom Interval(mm): 820/ 840 Describer: Seifert, K.
Hole: 465A Top of Core Depth(m) : 419.00 Rock Type: IGNEOUS
Core: 41 Sample Midpoint(m) : 421.33 Sect/Pc #: 2/PCE 11A
ROCK = TRACHYTE;
Texture: HYALOPILITIC;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- PLAGIOCLASE
PHENOS + MICROPHENOS*
Groundmass - PLAGIOCLASE
PARTLY FRESH;
OPAQUE MINERALS ( >1%)
INCLUDES MAGN + ILMENITE*
Alteration - CLAY MINERALS
Replacing: GLASS
MOSTLY ALTERED GLASS*
Leg : 62 Top/Bottom Interval(mm): 1370/1390 Describer: Seifert, K.
Hole: 465A Top of Core Depth(m) : 419.00 Rock Type: IGNEOUS
Core: 41 Sample Midpoint(m) : 421.88 Sect/Pc #: 2/PCE 17A
ROCK = TRACHYTE;
Texture: HYALOPILITIC;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- PLAGIOCLASE
BOTH PHENOS + MICROPHENOS*
Groundmass - PLAGIOCLASE
PARTLY FRESH;
OPAQUE MINERALS ( >1%)
INCLUDES MAGN + ILMENITE*
Alteration - CLAY MINERALS
Replacing: GLASS
MOSTLY ALTERED GLASS*
Leg : 62 Top/Bottom Interval(mm): 1270/1290 Describer: Windom, K.
Hole: 465A Top of Core Depth(m) : 428.50 Rock Type: IGNEOUS
Core: 42 Sample Midpoint(m) : 429.78 Sect/Pc #: 1/PCE 8A
ROCK = TRACHYTE;
Texture: APHYRIC,HYALOPILITIC,VESICULAR*
Phenocrysts- OLIVINE ( 0%)
PLAGIOCLASE ( 3.8%)
Size(mm): 0.06-0.4 Morphology: LATHS,RHOMBS
CLINOPYROXENE ( 0%)
SPINEL ( 0%)
Groundmass - OLIVINE ( 0%)
PLAGIOCLASE ( 27.5%)
CLINOPYROXENE ( 0%)
MAGNETITE ( 0.7%)
ILMENITE ( 0%)
GLASS
SEE CLAY.MIN;
ORTHOPYROXENE ( 0%)
QUARTZ ( 0%)
ALKALI FELDSPAR ( 0%)
PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - CARBONATE ( 2.4%)
Location: VESICLES
CLAY MINERALS ( 57.4%)
Replacing: GLASS
Vesicles -
Size(mm): 0.1-1
Percent: 8.6
Filling: CALCITE-EMPTY
Shape: IRREGULAR
CALCITE FILLING SOME BUT MOST ARE VOID*
Leg : 62 Top/Bottom Interval(mm): 900/ 920 Describer: Seifert, K.
Hole: 465A Top of Core Depth(m) : 428.50 Rock Type: IGNEOUS
Core: 42 Sample Midpoint(m) : 430.91 Sect/Pc #: 2/PCE 8B
ROCK = TRACHYTE;
Texture: PILOTAXITIC,VESICULAR;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- PLAGIOCLASE
BOTH PHENOS + MICROPHENOS*
Groundmass - PLAGIOCLASE
PARTLY FRESH;
OPAQUE MINERALS ( >1%)
INCLUDES MAGN + ILMENITE*
Alteration - CLAY MINERALS
Replacing: GLASS
MOSTLY ALTERED GLASS*
Leg : 62 Top/Bottom Interval(mm): 840/ 860 Describer: Seifert, K.
Hole: 465A Top of Core Depth(m) : 428.50 Rock Type: IGNEOUS
Core: 42 Sample Midpoint(m) : 432.35 Sect/Pc #: 3/PCE 8
ROCK = TRACHYTE;
Texture: APHYRIC,PILOTAXITIC,VESICULAR;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- PLAGIOCLASE
MICROPHENOS*
Groundmass - PLAGIOCLASE
PARTLY FRESH;
OPAQUE MINERALS ( >1%)
INCLUDES MAGN + ILMENITE*
Alteration - CLAY MINERALS
Replacing: GLASS
MOSTLY ALTERED GLASS*
Leg : 62 Top/Bottom Interval(mm): 640/ 660 Describer: Seifert, K.
Hole: 465A Top of Core Depth(m) : 438.00 Rock Type: IGNEOUS
Core: 43 Sample Midpoint(m) : 438.65 Sect/Pc #: 1/PCE 11
ROCK = TRACHYTE;
Texture: APHYRIC,PILOTAXITIC,VESICULAR*
Phenocrysts- PLAGIOCLASE
ONLY MICROPHENOS*
Groundmass - PLAGIOCLASE
MOSTLY FRESH;
OPAQUE MINERALS ( >1%)
INCLUDES MAGN + ILMENITE*
Alteration - CLAY MINERALS
Replacing: GLASS
Leg : 62 Top/Bottom Interval(mm): 910/ 930 Describer: Seifert, K.
Hole: 465A Top of Core Depth(m) : 438.00 Rock Type: IGNEOUS
Core: 43 Sample Midpoint(m) : 438.92 Sect/Pc #: 1/PCE 15
ROCK = TRACHYTE;
Texture: HYALOPILITIC,VESICULAR;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- PLAGIOCLASE
PHENOS + MICROPHENOS*
Groundmass - PLAGIOCLASE
PARTLY FRESH;
OPAQUE MINERALS ( >2%)
INCLUDES MAGN + ILMENITE*
Alteration - CLAY MINERALS
Replacing: GLASS
Leg : 62 Top/Bottom Interval(mm): 1050/1070 Describer: Seifert, K.
Hole: 465A Top of Core Depth(m) : 438.00 Rock Type: IGNEOUS
Core: 43 Sample Midpoint(m) : 439.06 Sect/Pc #: 1/PCE 17
ROCK = TRACHYTE;
Texture: HYALOPILITIC,VESICULAR;
Where sampled: NEXT TO GLASSY MARGIN*
Phenocrysts- PLAGIOCLASE
BOTH PHENOS + MICROPHENOS*
Groundmass - PLAGIOCLASE
PARTLY FRESH;
OPAQUE MINERALS ( >1-2%)
INCLUDES MAGN + ILMENITE*
Alteration - CLAY MINERALS
Replacing: GLASS
Leg : 62 Top/Bottom Interval(mm): 650/ 680 Describer: Seifert, K.
Hole: 465A Top of Core Depth(m) : 438.00 Rock Type: IGNEOUS
Core: 43 Sample Midpoint(m) : 440.17 Sect/Pc #: 2/PCE 7A
ROCK = TRACHYTE;
Texture: APHYRIC,HYALOPILITIC,VESICULAR*
Phenocrysts- PLAGIOCLASE
ONLY MICROPHENOS*
Groundmass - PLAGIOCLASE
PARTLY FRESH;
OPAQUE MINERALS ( >1%)
INCLUDES MAGN + ILMENITE*
Alteration - CLAY MINERALS
Replacing: GLASS
Leg : 62 Top/Bottom Interval(mm): 1070/1090 Describer: Windom, K.
Hole: 465A Top of Core Depth(m) : 438.00 Rock Type: IGNEOUS
Core: 43 Sample Midpoint(m) : 440.58 Sect/Pc #: 2/PCE 10
ROCK = TRACHYTE;
Texture: APHYRIC,VESICULAR,HYALOPILITIC,PILOTAXITIC*
Phenocrysts- OLIVINE ( 0%)
PLAGIOCLASE ( 4.1%)
Size(mm): 8-0.5 Morphology: LATHS
MICROPHENOS;
CLINOPYROXENE ( 0%)
SPINEL ( 0%)
Groundmass - OLIVINE ( 0%)
PLAGIOCLASE ( 31.1%)
MICROLITES;
CLINOPYROXENE ( 0%)
MAGNETITE ( 1.0%)
GLASS
SEE CLAY.MIN;
ORTHOPYROXENE ( 0%)
QUARTZ ( 0%)
ALKALI FELDSPAR ( 0%)
PERCENTAGES OBTAINED BY POINT COUNT*
Alteration - CLAY MINERALS ( 61.1%)
Replacing: GLASS
CLAY MINERALS ( 0.2%)
GREEN,QUESTIONABLE AS TO WHAT IS BEING REPLACED*
Vesicles -
Percent: 2.5
Leg : 62 Top/Bottom Interval(mm): 780/ 800 Describer: Seifert, K.
Hole: 465A Top of Core Depth(m) : 447.50 Rock Type: IGNEOUS
Core: 44 Sample Midpoint(m) : 448.29 Sect/Pc #: 1/PCE 10
ROCK = TRACHYTE;
Texture: PILOTAXITIC,VESICULAR*
Phenocrysts- PLAGIOCLASE
BOTH PHENOS + MICROPHENOS*
Groundmass - PLAGIOCLASE
RATHER FRESH;
OPAQUE MINERALS ( >1%)
INCLUDES MAGN + ILMENITE*
Alteration - CLAY MINERALS
Replacing: GLASS
Leg : 62 Top/Bottom Interval(mm): 370/ 390 Describer: Seifert, K.
Hole: 465A Top of Core Depth(m) : 447.50 Rock Type: IGNEOUS
Core: 44 Sample Midpoint(m) : 449.38 Sect/Pc #: 2/PCE 5
ROCK = TRACHYTE;
Texture: APHYRIC,HYALOPILITIC,VESICULAR*
Phenocrysts- PLAGIOCLASE
ONLY MICROPHENOS*
Groundmass - PLAGIOCLASE
PARTLY FRESH;
OPAQUE MINERALS ( >1%)
INCLUDES MAGN + ILMENITE*
Alteration - CLAY MINERALS
Replacing: GLASS,PLAG
Leg : 62 Top/Bottom Interval(mm): 990/1010 Describer: Seifert, K.
Hole: 465A Top of Core Depth(m) : 457.00 Rock Type: IGNEOUS
Core: 45 Sample Midpoint(m) : 458.00 Sect/Pc #: 1/PCE 7A
ROCK = TRACHYTE;
Texture: APHYRIC,HYALOPILITIC,VESICULAR*
Phenocrysts- PLAGIOCLASE
ONLY MICROPHENOS*
Groundmass - PLAGIOCLASE
PARTLY FRESH;
OPAQUE MINERALS ( <1%)
INCLUDES MAGN + ILMENITE*
Alteration - CARBONATE
Replacing: PLAG
CLAY MINERALS
Replacing: GLASS
Leg : 62 Top/Bottom Interval(mm): 1230/ 0 Describer: Seifert, K.
Hole: 465A Top of Core Depth(m) : 457.00 Rock Type: IGNEOUS
Core: 45 Sample Midpoint(m) : 458.23 Sect/Pc #: 1/PCE 8B
ROCK = TRACHYTE;
Texture: PILOTAXITIC,VESICULAR*
Phenocrysts- PLAGIOCLASE
BOTH PHENOS + MICROPHENOS*
Groundmass - PLAGIOCLASE
MOSTLY FRESH;
OPAQUE MINERALS ( >2%)
INCLUDES MAGN + ILMENITE*
Alteration - CLAY MINERALS
Replacing: GLASS,PLAG
Leg : 62 Top/Bottom Interval(mm): 60/ 0 Describer: Seifert, K.
Hole: 465A Top of Core Depth(m) : 457.00 Rock Type: IGNEOUS
Core: 45 Sample Midpoint(m) : 458.56 Sect/Pc #: 2/PCE 1
ROCK = TRACHYTE;
Texture: APHYRIC,HYALOPILITIC,VESICULAR*
Phenocrysts- PLAGIOCLASE
ONLY MICROPHENOS*
Groundmass - PLAGIOCLASE
PARTLY FRESH;
OPAQUE MINERALS ( >2%)
INCLUDES MAGN + ILMENITE*
Alteration - CARBONATE
LARGE XTLS;
CLAY MINERALS
Replacing: GLASS,PLAG
Leg : 62 Top/Bottom Interval(mm): 1140/1160 Describer: Seifert, K.
Hole: 465A Top of Core Depth(m) : 457.00 Rock Type: IGNEOUS
Core: 45 Sample Midpoint(m) : 459.65 Sect/Pc #: 2/PCE 15B
ROCK = TRACHYTE;
Texture: HYALOPILITIC,VESICULAR*
Phenocrysts- PLAGIOCLASE
BOTH PHENOS + MICROPHENOS*
Groundmass - PLAGIOCLASE
MOSTLY FRESH;
OPAQUE MINERALS ( >1%)
INCLUDES MAGN + ILMENITE*
Alteration - CLAY MINERALS
Replacing: GLASS,PLAG
Leg : 62 Top/Bottom Interval(mm): 1310/1330 Describer: Seifert, K.
Hole: 465A Top of Core Depth(m) : 457.00 Rock Type: IGNEOUS
Core: 45 Sample Midpoint(m) : 462.82 Sect/Pc #: 4/PCE 15
ROCK = TRACHYTE;
Texture: PILOTAXITIC,VESICULAR*
Phenocrysts- PLAGIOCLASE
BOTH PHENOS + MICROPHENOS*
Groundmass - PLAGIOCLASE
PARTLY FRESH;
OPAQUE MINERALS ( >2%)
INCLUDES MAGN + ILMENITE*
Alteration - CARBONATE
Location: VEINS
IN VEINS;
CLAY MINERALS
Replacing: GLASS,PLAG
Leg : 62 Top/Bottom Interval(mm): 370/ 390 Describer: Seifert, K.
Hole: 465A Top of Core Depth(m) : 466.50 Rock Type: IGNEOUS
Core: 46 Sample Midpoint(m) : 466.88 Sect/Pc #: 1/PCE 6C
ROCK = TRACHYTE;
Texture: PILOTAXITIC,VESICULAR*
Phenocrysts- PLAGIOCLASE
BOTH PHENOS + MICROPHENOS*
Groundmass - PLAGIOCLASE
PARTLY FRESH;
OPAQUE MINERALS ( >1-2%)
INCLUDES MAGN + ILMENITE*
Alteration - CLAY MINERALS
Replacing: GLASS,PLAG
Leg : 62 Top/Bottom Interval(mm): 160/ 180 Describer: Seifert, K.
Hole: 465A Top of Core Depth(m) : 466.50 Rock Type: IGNEOUS
Core: 46 Sample Midpoint(m) : 469.67 Sect/Pc #: 3/PCE 2
ROCK = TRACHYTE;
Texture: HYALOPILITIC,VESICULAR*
Phenocrysts- PLAGIOCLASE
BOTH PHENOS + MICROPHENOS*
Groundmass - PLAGIOCLASE
PARTLY FRESH;
OPAQUE MINERALS ( >1%)
INCLUDES MAGN + ILMENITE*
Alteration - CLAY MINERALS
Replacing: GLASS,PLAG
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