A lithofacies study of the Frio formation in the upper Gulf Coast region of Texas

A 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.