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Core Data from the Deep Sea Drilling Project


Leg : 26    Top/Bottom Interval(mm):  980/1500  Analyst: McKelvey, B.C.
Hole: 254   Sample Midpoint (m)    :   277.50
Core:  31   Top of Core Depth (m)  :   276.00
Sect:  1    Top of Section Depth(m):   276.98

LITHOLOGY: BASALT;

  Texture    : MEDIUM GRAINED, COGNATE XENOLITH AT 105 CM AND FINER
               GRAINED;

  Structure  : NO OTHER JOINTS, ONE CARBONATE VEIN (2 CM);

  Alteration : FRESH BASALT;

  Replacement: CARBONATE
               ONE CARBONATE VEIN (2 CM);


Leg : 26    Top/Bottom Interval(mm):  320/ 720  Analyst: McKelvey, B.C.
Hole: 254   Sample Midpoint (m)    :   300.72
Core:  33   Top of Core Depth (m)  :   300.00
Sect:  1    Top of Section Depth(m):   300.32

LITHOLOGY: SEDIMENT (FERRUGINOUS SILTY CLAY);

  Comments   : MODERATE BROWN (5 YR 3/4), POSSIBLY WEATHERED,
               DEPOSITIONAL CONTACT AT 72 CM;


Leg : 26    Top/Bottom Interval(mm):  720/1500  Analyst: McKelvey, B.C.
Hole: 254   Sample Midpoint (m)    :   301.50
Core:  33   Top of Core Depth (m)  :   300.00
Sect:  1    Top of Section Depth(m):   300.72

LITHOLOGY: BASALT;

  Texture    : WEATHERED HEMICRYSTALLINE PORYPHYRITIC BASALT -
               FORMERLY GLASSY GRAINED;

  Comments   : VERY WEATHERED BASALT, DEPOSITIONAL CONTACT AT 72
               CM;

  Vesicles   : ONE LARGE VESICLE;


Leg : 26    Top/Bottom Interval(mm):    0/   0  Analyst: McKelvey, B.C.
Hole: 254   Sample Midpoint (m)    :   309.60
Core:  34   Top of Core Depth (m)  :   309.50
Sect: CC    Top of Section Depth(m):   309.60

LITHOLOGY: BASALT;

  Texture    : TWO PIECES OF HEMICRYSTALLINE PORYPHYRITIC BASALT;

  Alteration : FRESH, BUT POSSIBLY HAS REGIONS OF ALTERATION;

  Comments   : CORE CATCHER RECOVERY ONLY;


Leg : 26    Top/Bottom Interval(mm):  400/1500  Analyst: McKelvey, B.C.
Hole: 254   Sample Midpoint (m)    :   311.50
Core:  35   Top of Core Depth (m)  :   310.00
Sect:  1    Top of Section Depth(m):   310.40

LITHOLOGY: BASALT;

  Texture    : FINE GRAINED AT TOP OF SECTION WITH GRADATIONAL
               VARIATION IN GRAIN SIZE TO MEDIUM GRAINED AT
               BOTTOM OF SECTION;

  Structure  : CALCITE VEIN AT 100 CM;

  Comments   : BROWNISH BLACK (5 YR 2/1);

  Groundmass : FELDSPAR
               BROWNISH BLACK (5 YR 2/1) AND (N8) FELDSPARS IN
               GROUNDMASS;

  Replacement: CALCITE
               CALCITE VEIN AT 100 CM;


Leg : 26    Top/Bottom Interval(mm):    0/1500  Analyst: McKelvey, B.C.
Hole: 254   Sample Midpoint (m)    :   313.00
Core:  35   Top of Core Depth (m)  :   310.00
Sect:  2    Top of Section Depth(m):   311.50

LITHOLOGY: BASALT;

  Texture    : MEDIUM GRAINED;

  Structure  : RARE VEINS OF CALCITE;

  Alteration : RELATIVELY FRESH BASALT;

  Groundmass : FELDSPAR
               FELDSPARS (N8) IN GROUNDMASS;


Leg : 26    Top/Bottom Interval(mm):    0/1500  Analyst: McKelvey, B.C.
Hole: 254   Sample Midpoint (m)    :   314.50
Core:  35   Top of Core Depth (m)  :   310.00
Sect:  3    Top of Section Depth(m):   313.00

LITHOLOGY: BASALT;

  Texture    : MEDIUM GRAINED THROUGHOUT, WHOLE SECTION FRAGMENTED
               WITH FOUR 10 CM PIECES, AT 133 CM AMYGDALOIDAL FINE
               GRAINED BLACK AND POSSIBLY GLASSY;

  Comments   : AT 133 CM BLACK BASALT, CONTACT AT 133 CM NOT
               PRESERVED;

  Vesicles   :
               Location:            Filling: CALCIUM CARB
               AT 10 CM CALCIUM CARBONATE FILLED VESICLE,
               BETWEEN 133 CM AND 150 CM AMYGDALOIDAL BASALT
               WITH CALCIUM CARBONATE IN AMYGDULES;

  Replacement: CARBONATE
               IN VESICLES AND AMYGDULES;


Leg : 26    Top/Bottom Interval(mm):    0/   0  Analyst: McKelvey, B.C.
Hole: 254   Sample Midpoint (m)    :   314.60
Core:  35   Top of Core Depth (m)  :   310.00
Sect: CC    Top of Section Depth(m):   314.60

LITHOLOGY: BASALT;

  Comments   : SEE CORE FORM AND LITHOLOGIC DESCRIPTION IN THE
               INITIAL REPORTS FOR MORE INFORMATION;


Leg : 26    Top/Bottom Interval(mm):  290/1500  Analyst: McKelvey, B.C.
Hole: 254   Sample Midpoint (m)    :   316.50
Core:  36   Top of Core Depth (m)  :   315.00
Sect:  1    Top of Section Depth(m):   315.29

LITHOLOGY: BASALT;

  Texture    : FINE GRAINED (N2), DARK AMYGDALOIDAL BASALT;

  Comments   : FOR MORE INFORMATION SEE CORE FORM AND LITHOLOGIC
               DESCRIPTION IN THE INITIAL REPORTS;

  Vesicles   :
               Location:            Filling: CALCITE
               DARK AMYGDALOIDAL BASALT, CALCITE AMYGDULES;


Leg : 26    Top/Bottom Interval(mm):    0/1500  Analyst: McKelvey, B.C.
Hole: 254   Sample Midpoint (m)    :   318.00
Core:  36   Top of Core Depth (m)  :   315.00
Sect:  2    Top of Section Depth(m):   316.50

LITHOLOGY: BASALT;

  Texture    : FINE GRAINED AND GLASSY, AMYGDULES AT 140 CM AND
               COARSER;

  Comments   : FOR MORE INFORMATION SEE CORE FORM AND LITHOLOGIC
               DESCRIPTION IN THE INITIAL REPORTS;

  Vesicles   : Size(mm): 1.5        Percent:
               AMYGDALOIDAL BASALT WITH DENSITY OF AMYGDULES
               VARIES WITH NO OBVIOUS PATTERN, AMYGDULES UP TO
               1.5 CM, AMYGDULES AT 140 CM AND BASALT COARSER;


Leg : 26    Top/Bottom Interval(mm):    0/1500  Analyst: McKelvey, B.C.
Hole: 254   Sample Midpoint (m)    :   319.50
Core:  36   Top of Core Depth (m)  :   315.00
Sect:  3    Top of Section Depth(m):   318.00

LITHOLOGY: BASALT;

  Texture    : GLASSY IN TOP 10 CM, GRAIN SIZE DECREASES IN SECTION
               FOLLOWING 10 CM - FINER GRAINED BASALT AT BOTTOM
               OF SECTION AND COARSER GRAINED HIGHER IN SECTION;

  Comments   : FOR MORE INFORMATION SEE CORE FORM AND LITHOLOGIC
               DESCRIPTION IN THE INITIAL REPORTS;


Leg : 26    Top/Bottom Interval(mm):    0/   0  Analyst: McKelvey, B.C.
Hole: 254   Sample Midpoint (m)    :   319.60
Core:  36   Top of Core Depth (m)  :   315.00
Sect: CC    Top of Section Depth(m):   319.60

LITHOLOGY: BASALT;

  Comments   : FOR MORE INFORMATION SEE CORE FORM AND LITHOLOGIC
               DESCRIPTION IN THE INITIAL REPORTS;


Leg : 26    Top/Bottom Interval(mm):    0/   0  Analyst: McKelvey, B.C.
Hole: 254   Sample Midpoint (m)    :   324.60
Core:  37   Top of Core Depth (m)  :   324.50
Sect: CC    Top of Section Depth(m):   324.60

LITHOLOGY: BASALT;

  Comments   : ONE PEBBLE 5 CM, (5 YR 2/1) BROWNISH BLACK BASALT,
               WEATHERED VESICULAR BASALT,
               FOR MORE INFORMATION SEE CORE FORM AND LITHOLOGIC
               DESCRIPTION IN THE INITIAL REPORTS;

  Vesicles   : WEATHERED VESICULAR BASALT;


Leg : 26    Top/Bottom Interval(mm):  350/1500  Analyst: McKelvey, B.C.
Hole: 254   Sample Midpoint (m)    :   335.50
Core:  38   Top of Core Depth (m)  :   334.00
Sect:  1    Top of Section Depth(m):   334.35

LITHOLOGY: BASALT;

  Texture    : COMPACTED AGGLOMERATE BASALT WITH CALCIUM CARBONATE
               CEMENT;

  Structure  : BASALT ESSENTIALLY MASSIVE INTERVAL (59-105 CM);

  Comments   : COMPACTED AGGLOMERATE BASALT WITH CALCIUM CARBONATE
               CEMEMT, FOR MORE INFORMATION SEE CORE FORM AND
               LITHOLOGIC DESCRIPTION IN THE INITIAL REPORTS;

  Replacement: CARBONATE
               CARB CEMENT IN AGGLOMERATE BASALT;


Leg : 26    Top/Bottom Interval(mm):    0/   0  Analyst: McKelvey, B.C.
Hole: 254   Sample Midpoint (m)    :   335.60
Core:  38   Top of Core Depth (m)  :   334.00
Sect: CC    Top of Section Depth(m):   335.60

LITHOLOGY: BASALT;

  Comments   : FOR MORE INFORMATION SEE CORE FORM AND LITHOLOGIC
               DESCRIPTION IN THE INITIAL REPORTS;


    

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