Abstract

The Tishomingo horst and the deep seated normal faults of the Arbuckle Mountains faullt system that bounds it extend approximately 30 mi beneath overlapping Cretaceous rocks into Bryan and Atoka Counties, Okla. The Sulphur fault, which bounds this horst on the northeast, truncates the Ti Valley fault of the Ouachita fault system indicating that major deformation of the Arbuckle system took place after that of the Ouachita. The Ardmore basin is parallel on the southwest to the Tishomingo horst and is an areea of intense deformation.

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