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Book Chapter

In Search of Biostratigraphic Resolution

By
T. C. Moore, Jr.
T. C. Moore, Jr.
Graduate School of Oceanography
University of Rhode Island, Kingston, RI 02881 U.S.A.
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Karen Romine
Karen Romine
Graduate School of Oceanography
University of Rhode Island, Kingston, RI 02881 U.S.A.
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Published:
January 01, 1981

Abstract

The Deep Sea Drilling Project has contributed greatly to the improvement and expansion of marine biostratigraphy. However, if stratigraphic resolution is described in terms of the number of zonal boundaries per million years, it appears that the resolution of zonal stratigraphies varies with time and is related to the degree of variability of the ocean environment. Several problems which contribute to the present limitations of stratigraphic resolution have to be dealt with: a) taxonomic inadequacies and disagreements in taxonomic applications; b) incompleteness of the preserved record; c) incompleteness and disturbed nature of DSDP recovery; d) correct interpretation and correlation of stratigraphically useful signals.

One approach to improving stratigraphic resolution is the development of broad, regional holistic stratigraphies which combine lithostratigraphy, isotopic stratigraphy, paleomagnetic stratigraphy and species assemblage stratigraphy with the use of first and last appearances for species from several fossil groups. Detailed stratigraphic and time-slice studies of the Quaternary serve as guides to both the possibilities and pitfalls of expanding and improving the resolution of Cenozoic stratigraphy. Using composite stratigraphies, the average limit of Quaternary stratigraphic resolution is near 20,000 years as opposed to the present limit of 100,000 years in the Cenozoic.

An improved coring technique recently developed by DSDP, the hydraulic piston corer, should diminish manyof the problems with section recovery and disturbance. It offers an opportunity to develop a holistic approach to Cenozoic stratigraphy and ultimately accomplish the goals of high stratigraphic resolution and global chronostratigraphy.

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Contents

SEPM Special Publication

The Deep Sea Drilling Project: A Decade of Progress

John E. Warme
John E. Warme
Colorado School of Mines, Golden Colorado.
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Robert G. Douglas
Robert G. Douglas
University of Southern California, Los Angeles California
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Edward L. Winterer
Edward L. Winterer
Scripps Institution of Oceanography, La Jolla California
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SEPM Society for Sedimentary Geology
Volume
32
ISBN electronic:
9781565761629
Publication date:
January 01, 1981

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