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Core Data from the Deep Sea Drilling Project


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




    

Introduction


Cite as: Deep Sea Drilling Project (1989): Archive of Core and Site/Hole Data and Photographs from the Deep Sea Drilling Project (DSDP). National Geophysical Data Center, NOAA. doi:10.7289/V54M92G2 [access date]

These Web pages are from the Core Data from the Deep Sea Drilling Project Legs 1-96 CD-ROM produced in 1989 and modified in 2000 by the U.S. Department of Commerce, National Oceanic and Atmospheric Administration, National Environmental Satellite, Data, and Information Service, National Geophysical Data Center (now part of the National Centers for Environmental Information), and collocated World Data Center for Marine Geology and Geophysics, Boulder (now part of the World Data Service for Geophysics). Data were compiled in cooperation with the U.S. Science Support Program, of the Joint Oceanographic Institutions, Inc. (now the Consortium for Ocean Leadership), and the U.S. National Science Foundation.

Please see NOAA's privacy and disclaimer information. Send questions or comments to mgg.info@noaa.gov.

Department of Commerce > NOAA > NESDIS > NCEI > doi:10.7289/V54M92G2