Lowstand valley fill and shelf-edge deltaic deposits in the Tannehill sandstone (Wolfcampian Cisco Group) in the Eastern Shelf of the Permian Basin are major targets for oil and gas exploration. The most-productive trends link coarse-grained alluvial systems in Baylor County to shelf-edge and upper-slope deepwater systems in Dickens County.

This map presents a graphic means for engineers, planners, and property owners to recognize and cope with the changes in substrate properties across this fault zone. Fault displacement has created a profound and abrupt change in land-use capabilities in this area.

The hydromechanical properties of the uppermost basement and of the basement–sediment interface influence multiple geologic processes of societal relevance, including the flow of groundwater; the accumulation of hydrocarbons, economic minerals, and geothermal resources; and the response of seismogenic faults to wastewater disposal.