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Persimmon Gap in Big Bend National Park, Texas; Ouachita facies and Cretaceus cover deformed in a Laramide overthrust

By
Peter R. Tauvers
Peter R. Tauvers
Department of Geological Sciences, University of Texas at Austin, Austin Texas 78713-7909
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William R. Muehlberger
William R. Muehlberger
Department of Geological Sciences, University of Texas at Austin, Austin Texas 78713-7909
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Published:
January 01, 1988

Abstract

Persimmon Gap is unique in that the effects of three major Persimmon Gap. A wind gap that was part of the historic orogenies are exposed. A Paleozoic inlier features the southern- Comanche Trail crosses the southern Santiago Mountains at the most exposed thrust faults (Upper Ordovician over Lower Pennnorthern entrance to Big Bend National Park. The Persimmon sylvanian) of the Ouachita system in Texas. These rocks and the Gap site is 42 mi (68 km) south of Marathon, Texas, along U.S. Cretaceus cover (predominantly limestone) were involved in 385 (Fig. 1). The main outcrop is a prominent peak 0.5 mi (0.8 oblique overthrusting during Laramide left-slip transgression, lokm) east of the highway that can be reached easily by walking up tally creating a positive flower structure. Right-slip transtensional an arroyo into the hills (Fig. 2). Beware of cactus! Permission to faulting of the present cycle of Basin and Range deformation is walk off road should first be obtained at Persimmon Gap Ranger evident via downdropped fault blocks. The geologic history of the station 0.2 mi (0.3 km) south of the outcrop. The park has a region is dominated by repeated movements of basement-rooted nominal entrance fee. northwest-trending faults.

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Contents

DNAG, Centennial Field Guides

South-Central Section of the Geological Society of America

O. T. Hayward
O. T. Hayward
Geology Department, Baylor University, Waco, Texas 76798
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Geological Society of America
Volume
4
ISBN electronic:
9780813754109
Publication date:
January 01, 1988

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