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Paleokarst Within the Knox Group of Alabama, East Side of the Black Warrior Basin

By
James Lee Wilson
James Lee Wilson
Consultant New Braunfels, TX
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Patrick Medlock
Patrick Medlock
MASERA Corporation Austin, TX
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Roger Sels
Roger Sels
Amoco Production Company Houston, TX
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Published:
January 01, 1993

Abstract

Rocks of the Cambro-Ordovician systems are exposed in the Appalachian fold belt in the states of Tennessee, Virginia, Georgia, and Alabama, and extend westward from the southern Appalachians under the Black Warrior Basin of Alabama-Mississippi. These strata are practically all carbonate and were deposited on the eastern and southern passive margins of the North American craton. The great thickness of strata (up to 7000 ft. for the Lower Ordovician to Middle Cambrian) constitutes what R.N. Ginsburg has termed the Great American Bank, a vast Early Paleozoic carbonate platform extending from Newfoundland down the Appalachians, completely across the southern part of North America, and part way up the western part of North America, thus encircling more than half of the craton. The typical bank facies extends far up on the eastern craton, its characteristic strata being present as far north as the Canadian border. Throughout this extensive area the Cambro-Ordovician facies are very similar (Figs. 1 and 2). The Middle and Upper Cambrian develop sandy "pinch out" edges along the Transcontinental Arch and are onlapped by the Lower Ordovician. Practically all of the Lower Ordovician carbonate facies consist of shallow, restricted marine, dolomitized, upward shoaling, subtidal to tidal flat cycles. These occur over a broad area of more than 1000 miles (e.g., from the Oneota-Shackopee dolomites of Wisconsin to the Knox Group of the Warrior Basin in Alabama (Fig. 3 and 4).

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Contents

SEPM Core Workshop Notes

Paleokarst Related Hydrocarbon Reservoirs

Richard D. Fritz
Richard D. Fritz
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James L. Wilson
James L. Wilson
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Donald A. Yurewicz
Donald A. Yurewicz
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SEPM Society for Sedimentary Geology
Volume
18
ISBN electronic:
9781565762701
Publication date:
January 01, 1993

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