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Core Data from the Deep Sea Drilling Project


Leg : 64    Top/Bottom Interval(mm):    0/ 750  Analyst: Fornari, D.
Hole: 475   Sample Midpoint (m)    :   158.75
Core:  18   Top of Core Depth (m)  :   158.00
Sect:  1    Top of Section Depth(m):   158.00

LITHOLOGY: POLYGENETIC BOULDER TO COBBLE CONGLOMERATE;

  Piece No.  : PCE 1 (0-5), 2 (7-10), 3 (12-15), 4 (17-21),
               5 (18-23), 6 (29-35), 7 (37-41), 8 (42-50),
               9 (52-58), 10 (60-63), 11 (64-75);

  Comments   : PCE 1:  METAVOLCANICS,FINE-GRAINED, LIGHT MED. GRAY,
               THIN SUB-PARALLEL QUARTZ-FILLED FRACTURES (<1MM),
               ORTHOGONAL JOINT PATTERN;
               PCE 2:  METAQUARTZITE, LIGHT BEIGE;
               PCE 3 & 4:  LOW-GRADE QUARTZ SANDSTONE, COARSE-
               GRAINED, 1-2MM, PEPPERED-GREEN;
               PCE 5:  METAVOLCANIC, GREENISH-GRAY;
               PCES 6 & 7 & 8 & 11:  METAMORPHOSED GRAIN-SUPPORTED
               CONGLOMERATE,LARGE FRACTURED CLASTS OF FELDSPAR,
               QUARTZ, VOLCANICS AND LATH-SHAPED CLASTS TO 1 CM,
               REDDISH HUE;
               PCES 9 & 10:  COARSER-GRAINED THAN PCES 3 & 4,
               APPEARS TO BE METAMORPHOSED MEDIUM-GRAINED,
               POORLY SORTED GRAYWACKES;


Leg : 64    Top/Bottom Interval(mm):    0/ 470  Analyst: Fornari, D.
Hole: 475   Sample Midpoint (m)    :   167.97
Core:  19   Top of Core Depth (m)  :   167.50
Sect:  1    Top of Section Depth(m):   167.50

LITHOLOGY: POLYGENETIC BOULDER TO COBBLE CONGLOMERATE;
           COBBLES VARY FROM METAVOLCANIC TO METASEDIMENTARY
           ROCK OF MEDIUM-GRADE METAMORPHISM;

  Piece No.  : PCES 1 (0-4), 2 (7-10), 3 (12-17), 4 (19-21),
               5 (22-27), 6A & 6B (28-30), 7 (32-35), 8 (37-41),
               9 (42-47);

  Comments   : PCE 1:  METAGRAYWACKE SIMILAR TO PCES 3 AND 4 IN
               CORE 18-1;
               PCE 2:  GRAYISH-ORANGE PINK (5YR 7/2), SUBROUNDED
               COBBLE WITH QUARTZ AND FELDSPAR CRYSTALS RANDOMLY
               SET IN THE PINKISH,FINE-GRAINED MATRIX;
               PCE 3:  STRONGLY BANDED PINKISH GRAY TO GRAY-BLUE
               BANDS, POSSIBLY AN IGNIMBRITE;
               PCE 4:  SMALL PEBBLE SIMILAR TO PCE 1;
               PCE 5:  LIGHT GRAY METAVOLCANIC?;
               PCES 6A AND 6B:  SMALL,MODERATE BROWN (5YR 3/4)
               PURPLISH PEBBLE;
               PCE 7:  PALE RED (10R 6/2) COBBLE WITH LIGHT COLORED
               INCLUSIONS (NOT CRYSTALS);
               PCE 8:  COARSE-GRAINED ROCK,GRAYISH, COMPOSED OF
               SUBROUNDED ROCK CLASTS (2-5MM) CRUDELY ALIGNED AT
               TIMES;
               PCE 9:  GRAYISH-PALE RED (10R 6/2),FINE-GRAINED ROCK
               WITH FELDSPAR CLASTS,SUBHEDRAL TO ANHEDRAL, SET IN
               GRAYISH-PINKISH FINE MATRIX WITH BIOTITE FLAKES IN A
               IN A CRUDE, POORLY-DEFINED PARALLEL ALIGNMENT;


Leg : 64    Top/Bottom Interval(mm):    0/ 820  Analyst: Fornari, D.
Hole: 475   Sample Midpoint (m)    :   177.82
Core:  20   Top of Core Depth (m)  :   177.00
Sect:  1    Top of Section Depth(m):   177.00

LITHOLOGY: COBBLES TO PEBBLES OF VOLCANIC-SEDIMENTARY ROCK
           SHOWING LOW TO MEDIUM GRADE METAMORPHISM;

  Piece No.  : PCE 1 (0-9), 2 (10-18), 3 (20-22), 4 (23-26),
               5 (28-32), 6 (34-37), 7 (38-43), 8 (45-51),
               9 (54-60), 10 (64-68), 11 (70-74), 12 (75-82);

  Comments   : PCE 1:  SEVERAL PEBBLE FRAGMENTS:  ONE SHOWS
               BOUDINAGE AND FRACTURED CLASTS ALIGNED IN CRUDE
               BEDDING;
               PCE 2:  POLYGENETIC CONGLOMERATE SIMILAR TO PCES
               3 AND 4 IN CORE 18-1 AND PCE 1 IN CORE 19-1;
               PCE 3:  DARK GRAY WITH WHITE INCLUSIONS;
               PCE 4:  PINK PEBBLES SIMILAR TO CORE 18-1,PCES
               6,7,8 AND 11 (RHYOLITE);
               PCES 5 & 6:  DENSE GRAYISH OLIVE GREEN (5GY 3/2)
               ROUNDED COBBLES WITH PINK VEINS;
               PCE 7:  METACONGLOMERATE;
               PCE 8:  IGNIMBRITE,RHYOLITIC;
               PCE 9:  FINE-GRAINED,VOLCANIC ROCK,VERY DUSKY RED
               (10R 2/2) WITH GREEN SPECKS;
               PCES 10 & 11:  PINKISH,POORLY SORTED,VOLCANIC WITH
               GREEN SPECKS;
               PCE 12:  GRAYISH-BLUE METAGRAYWACKE(?) BIMODAL
               SORTING, FELDSPAR AND QUARTZ CLASTS;


Leg : 64    Top/Bottom Interval(mm):    0/ 800  Analyst: Fornari, D.
Hole: 475   Sample Midpoint (m)    :   187.30
Core:  21   Top of Core Depth (m)  :   186.50
Sect:  1    Top of Section Depth(m):   186.50

LITHOLOGY: COBBLES OF VOLCANIC-METAMORPHIC-SEDIMENTARY ROCK;

  Piece No.  : PCE 1 (0-10), 2 (13-15), 3 (12-14), 4 (20-22),
               5 (23-27), 6 (30-33), 7 (35-40), 8 (42-44),
               9 (47-50), 10 (53-55), 11 (56-59), 12 (62-65),
               13 (67-70), 14 (72-75), 15 (77-79);

  Comments   : PCE 1:  1-2MM GRAIN-SIZED SILICA-CEMENTED
               GRAYWACKE, GRAINS INCLUDE QUARTZ, FELDSPAR AND
               LITHIC FRAGMENTS, NARROW CALCITE BAND;
               PCE 2:  PURPLISH COLORED FELDSPATHIC TUFF(?) WITH
               EQUAL PROPORTIONS OF CLASTS AND APHANITIC
               GROUNDMASS;
               PCE 3:  VERY FINE-GRAINED LIGHT YELLOW (5YR 5/2)
               RHYOLITE WITH ORANGE 1.0-1.5MM YELLOW PHENOCRYSTS;
               PCE 4:  SAME AS PCE 1;
               PCE 5:  VERY COARSE POLYMICTIC BRECCIA, WITH QUARTZ
               (UP TO 5MM) AND LITHIC FRAGMENTS (UP TO 2CM) IN A
               SILICEOUS BROWN GROUNDMASS;
               PCE 6:  COARSE POLYMICTIC CONGLOMERATE, LARGE
               QUARTZITE PEBBLES (>0.5MM) IN SILICEOUS MATRIX;
               PCE 7:  0.5-4.0 MM GRAIN-SIZED SILICA-CEMENTED
                GRAYWACKE WITH QUARTZ-RICH BANDS, SOME LITHIC
               FRAGMENTS;
               PCE 8:  ?MEDIUM-GRAINED METASEDIMENT?;
               PCE 9:  ?SILICEOUS VEIN MATERIAL;
               PCE 10:  SIMILAR TO PCE 2;
               PCE 11:  FINE-GRAINED DARK GRAY QUARTZITIC
               SANDSTONE;
               PCE 12:  FINE-GRAINED GRAYWACKE (?) OR POORLY SORTED
               SANDSTONE WITH FOLIATION (PROBABLY DEPOSITIONAL)
               SHOWN BY BIOTITE;
               PCE 13:  MEDIUM-GRAINED PALE GRAY QUARTZITIC
               SANDSTONE;
               PCE 14:  POLYMICTIC CONGLOMERATE CONTAINING 0.2-3MM
               CLASTS OF QUARTZITE AND PELITES;


    

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.

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