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Microfacies Analysis of Berriasian–Hauterivian Carbonates, Central Saudi Arabia

By
Hisham T. Shebl
Hisham T. Shebl
Core Laboratories, P.O. Box 8503, Abu Dhabi, U.A.E..
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;
Abdulrahman S. Alsharhan
Abdulrahman S. Alsharhan
Faculty of Science, United Arab Emirates University, P.O. Box 17551, AlAin, U.A.E..
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Published:
January 01, 2000

Abstract

The deposition of the Lower Cretaceous in Saudi Arabia is interpreted within the framework of a model of a simple eastward–dipping carbonate ramp that formed as the result of the extensive flooding of the Arabian Plate during Early Berriasian time. Carbonate deposition was only slightly interrupted by a minor marine regression after the deposition of the Yamama Formation, and it was succeeding by bioclastic limestones of the Buwaib Formation. It was later terminated by a Barremian regression during which clastic deposition dominated most of Central and Eastern Arabia.

The Early Cretaceous carbonates of the Sulaiy, Yamama, and Buwaib formations crop out in central Saudi Arabia. According to sedimentological and paleontological data these formations consist of twenty–two successive microfacies correlated with the published standard microfacies types and belts. The Sulaiy, Yamama, and Buwaib formations were deposited in open–platform and lagoonal settings interrupted by two breaks in sedimentation: (1) a pre–Buwaib disconformity, which is marked by an abrupt change from the fine–grained lime mudstones of the upper Yamama to the sandy wackestones containing cyclamminids of the basal Buwaib, and (2) the more pronounced unconformity between the Buwaib bioclastic wackestone and the overlying Biyadh Sandstone.

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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.
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;
Robert W. Scott
Robert W. Scott
Precision Stratigraphy Associates, RR3 Box 103-3, Cleveland, OK 74020, U.S.A.
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SEPM Society for Sedimentary Geology
Volume
69
ISBN electronic:
9781565761919
Publication date:
January 01, 2000

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