Skip to Main Content
Book Chapter

Cenomanian-Santonian Calcareous Nannofossil Biostratigraphy of a Transect of Cores Drilled Across the Western Interior Seaway

By
Timothy J. Bralower
Timothy J. Bralower
Department of Geology, University of North Carolina, Chapel Hill, North Carolina 27599-3315
Search for other works by this author on:
James A. Bergen
James A. Bergen
Amoco, 501 West Lake Park Blvd., PO Box 3092, Houston, Texas 77253-3092
Search for other works by this author on:
Published:
January 01, 1998

Abstract

The Cenomanian-Santonian calcareous nannofossil biostratigraphy of the Rebecca Bounds, Portland, and Escalante cores was investigated. Zonal markers were used to correlate the Cenomanian-Turonian boundary interval in the cores with outcrop sections in the Western Interior basin. However, it is difficult to apply existing zonations in the remainder of the section. We determined several new biohorizons that are useful for drawing correlations between the cores. These biohorizons are combined with some of the standard zonal markers in defining informal zonal units. Environmental factors appear to have reduced nannofossil diversity along the western margin of the basin and led to the premature extinction of several nannofossil markers in the Cenomanian-Turonian boundary interval.

You do not currently have access to this article.

Figures & Tables

Contents

SEPM Concepts in Sedimentology and Paleontology

Stratigraphy and Paleoenvironments of the Cretaceous Western Interior Seaway, USA

Walter E. Dean
Walter E. Dean
U.S. Geological Survey, Denver, Colorado
Search for other works by this author on:
Michael A. Arthur
Michael A. Arthur
Pennsylvania State University, University Park, Pennsylvania
Search for other works by this author on:
SEPM Society for Sedimentary Geology
Volume
6
ISBN electronic:
9781565762299
Publication date:
January 01, 1998

GeoRef

References

Related

Citing Books via

Close Modal
This Feature Is Available To Subscribers Only

Sign In or Create an Account

Close Modal
Close Modal