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The AAPG/Datapages Combined Publications Database

AAPG Bulletin

Abstract


Volume: 23 (1939)

Issue: 11. (November)

First Page: 1694

Last Page: 1711

Title: Subsurface Cross Section of Permian from Texas to Nebraska

Author(s): C. L. Mohr (2)

Abstract:

The regional correlations of the lower and middle Permian are illustrated by means of sample logs of twenty wells situated nearly in a straight line from southeastern Irion County, Texas, to Phelps County, Nebraska. Two major disconformities, one at the base of the Wolfcamp and the other at the base of the Leonard, are traceable the entire distance. The lower of the two disconformities lies just under the lowest occurrence of the genus Schwagerina as recently redefined by Dunbar and Skinner and is correlated by the writer with the middle of the Harpersville in central Texas, the base of the Wanette in central Oklahoma, and the base of the Admire in Kansas and Nebraska. The disconformity at the Leonard-Wolfcamp contact represents a period of erosion and a striking environm ntal change from marine to semi-marine and saline conditions. An interesting transition occurs in the Leonard and lower Word equivalents from marine shales and limestones in western Texas, through semi-marine fossiliferous limestones, dolomites, shales, and anhydrites in west-central Texas, to redbeds, dolomites, anhydrites, and salts in Oklahoma, Kansas, and Nebraska. The Leonard-Wolfcamp contact occurs immediately below the Elm Creek in central Texas, on top of the Wanette in central Oklahoma, and probably between the Herington and the Winfield in Kansas and Nebraska. A local disconformity at the base of the San Angelo in Texas and the base of the Cedar Hills in the more northerly wells of Kansas seems to be missing in the deeper part of the Anadarko basin.

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