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Hydraulic piston coring of late Neogene and Quaternary sections in the Caribbean and equatorial Pacific: Preliminary results of Deep Sea Drilling Project Leg 68

Warren L. Prell; James V. Gardner; Charles Adelseck; Gretchen Blechschmidt; Andrew J. Fleet; Lloyd D. Keigwin; Dennis V. Kent; Michael T. Ledbetter; Ulrich Mann; Larry Mayer; William R. Reidel; Constance Sancetta; Dann J. Spariosu; Herman B. Zimmerman

Title:
Hydraulic piston coring of late Neogene and Quaternary sections in the Caribbean and equatorial Pacific: Preliminary results of Deep Sea Drilling Project Leg 68
Author(s):
Prell, Warren L.
Gardner, James V.
Adelseck, Charles
Blechschmidt, Gretchen
Fleet, Andrew J.
Keigwin, Lloyd D.
Kent, Dennis V.
Ledbetter, Michael T.
Mann, Ulrich
Mayer, Larry
Reidel, William R.
Sancetta, Constance
Spariosu, Dann J.
Zimmerman, Herman B.
Date:
Type:
Articles
Department:
Lamont-Doherty Earth Observatory
Volume:
91
Permanent URL:
Book/Journal Title:
Geological Society of America Bulletin
Abstract:
Leg 68 of the Deep Sea Drilling Project used the newly developed Hydraulic Piston Corer (HPC) to recover two virtually continuous, undisturbed sections of late Neogene and Quaternary sediment. The sites are located in the western Caribbean (Site 502, 4 holes) and in the eastern equatorial Pacific (Site 503, 2 holes). The sediment of Site 502 is primarily foram-bearing nanno marl which accumulated at about 3 to 4 cm/thousand yr. The bottom of Site 502 (228.7 m) is ~8 m.y. old. The sediment of Site 503 is primarily siliceous calcareous ooze which accumulated at about 2 to 3 cm/thousand yr. The bottom of Site 503 (235.0 m) is ~8 m.y. old. The magnetostratigraphy of both sites was determined on the R.V. Glomar Challenger with a long-core spinner magnetometer. All paleomagnetic boundaries through the Gilbert were identified in Site 502; most of them were identified in Site 503. The sediment at both sites shows a distinct cyclicity of calcium carbonate content. These relatively high accumulation rate, continuous, undisturbed HPC cores will enable a wide variety of high-resolution biostratigraphic, paleoclimatic, and paleoceanographic studies heretofore not feasible.
Subject(s):
Physical oceanography
Sedimentary geology
Publisher DOI:
http://dx.doi.org/10.1130/0016-7606(1980)91%3c433:HPCOLN%3e2.0.CO;2
Item views:
157
Metadata:
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