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Book Chapter

Similarity Curves as Indicators of Stratigraphic Discontinuities

By
Hilary Clement Olson
Hilary Clement Olson
Institute for Geophysics, The University of Texas at Austin, 4412 Spicewood Springs, Bldg. 600, Austin, Texas 78759, U.S.A. e-mail: olson@utig.ig.utexas.edu
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Anthony Gary
Anthony Gary
Energy and Geoscience Institute, University of Utah. 423 Wakara Way, Ste. 203, Salt Lake City, Utah 84108, U.S.A. e-mail: tgary@egi.utah.edu
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Garry D. Jones
Garry D. Jones
UNOCAL, 14141 SW Freeway, Sugar Land, Texas 77478, U.S.A. e-mail: garry.jones@unocal.com
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Published:
January 01, 2003

Abstract

An unconventional application of traditional similarity coefficients, the similarity curve, is presented to assist in the identification and interpretation of stratigraphic discontinuities. Similarity curves are generated for an entire stratigraphic sequence by comparing each sample to the sample immediately above it in stratigraphic sequence. Similarity coefficients are calculated for each sample pair on the basis of their contained foraminiferal assemblages, and a similarity curve is then generated for the stratigraphic section. By examining the breaks in these curves and comparing the total assemblage similarity curve to similarity curves generated individually for planktonic and benthic groups, we interpret candidates for discontinuities from a well in the Gulf of Mexico. Furthermore, we discuss these discontinuities and relate them to factors such as potential sea-level change, changes in sedimentation locus, and dissolution effects.

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SEPM Special Publication

Micropaleontologic Proxies for Sea-Level Change and Stratigraphic Discontinuities

Hilary Clement Olson
Hilary Clement Olson
Institute for Geophysics, University of Texas, 4412 Spicewood Springs Rd., Bldg. 600, Austin, Texas 78759-8500, U.S.A.
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R. Mark Leckie
R. Mark Leckie
Department of Geosciences, University of Massachusetts, 611 N. Pleasant St., Amherst Massachusetts 01003, U.S.A.
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SEPM Society for Sedimentary Geology
Volume
75
ISBN electronic:
9781565762121
Publication date:
January 01, 2003

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