2022-07-012022-07-011958195817594848https://hdl.handle.net/10657/10365A regional lithofacies study of the subsurface Frio formation in the upper Gulf Coast of Texas was undertaken to determine as much as possible the environmental conditions that may have existed during Frio time. Various lithofacies maps were prepared in order to delineate the various areas of deposition with respect to the lithofacies patterns produced. Such regional surveys, interpreted in the light of modern depositional environments and the sedimentary processes operating therein, can be very helpful in acquiring an understanding of the sediments deposited during past geologic ages.application/pdfenThis item is protected by copyright but is made available here under a claim of fair use (17 U.S.C. Section 107) for non-profit research and educational purposes. Users of this work assume the responsibility for determining copyright status prior to reusing, publishing, or reproducing this item for purposes other than what is allowed by fair use or other copyright exemptions. Any reuse of this item in excess of fair use or other copyright exemptions requires express permission of the copyright holder.Gulf CoastThesisreformatted digital