Skip to Main Content
Book Chapter

Can the Sedimentary Record be Dated from a Sea-Level Chart? Examples from the Aptian of the U.A.E. and Alaska

By
Christopher G. St. C. Kendall
Christopher G. St. C. Kendall
Department of Geological Sciences, University of South Carolina, Columbia, SC 29208, U.S.A..
Search for other works by this author on:
;
Abdulrahman S. Alsharhan
Abdulrahman S. Alsharhan
Faculty of Science, United Arab Emirates, P.O. Box 17551, Al Ain, U.A.E..
Search for other works by this author on:
;
Kurt Johnston
Kurt Johnston
Department of Geological Sciences, University of South Carolina, Columbia, SC 29208, U.S.A..
Search for other works by this author on:
;
Sean R. Ryan
Sean R. Ryan
Department of Geological Sciences, University of South Carolina, Columbia, SC 29208, U.S.A..
Search for other works by this author on:
Published:
January 01, 2000

Abstract

Ten depositional shoaling-upward cycles have been identified in the Aptian Shuaiba Formation of the United Arab Emirates (U.A.E.). A similar number of cycles have been recognized in the National Petroleum Reserve of Alaska (NPRA). Similarities of these cycles with the onlapping shelf geometries of the Neogene of the Bahamas suggest that the sequence geometries of Aptian strata of the NPRA and the U.A.E. are a response to high-frequency changes in eustatic sea-level position. Because the Aptian cycles of the NPRA match similarly dated, events in the U.A.E., it is suggested that where biostratigraphic data are poor the sedimentary section can be tentatively dated by relating the geometries of the shelf margin to the character of the coastal onlap curve and its coincident sea-level chart. Thus, a sea-level chart might be used at locations for which biostratigraphic data is sparse to determine and constrain preliminary depositional models for specific time intervals.

With this in mind, two biostratigraphic models for dating the Shuaiba Formation and the Bab Member were tested against the sea-level curve of Haq et al. (1987) using a sedimentary simulation. The results were ambiguous because both biostratigraphic models could not be matched. Also in both cases, the simulation suggested that just prior to the deposition of the Bab Member the basin margin was uplifted and then subsided, causing a local relative sea-level fall followed by a rise, an event not found on the sea-level chart of Haq et al. (1987). Additionally, the sedimentary simulation supports the position that the Aptian in the U.A.E. is bounded by erosional unconformity surfaces and contains higher-frequency cycles.

You do not currently have access to this article.

Figures & Tables

Contents

SEPM Special Publication

Middle East Models of Jurassic/Cretaceous Carbonate Systems

Abdulrahman S. Alsharhan
Abdulrahman S. Alsharhan
Faculty of Science United Arab Emirates University, P.O. Box 17551, Al Ain, U.A.E.
Search for other works by this author on:
;
Robert W. Scott
Robert W. Scott
Precision Stratigraphy Associates, RR3 Box 103-3, Cleveland, OK 74020, U.S.A.
Search for other works by this author on:
SEPM Society for Sedimentary Geology
Volume
69
ISBN electronic:
9781565761919
Publication date:
January 01, 2000

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