This six-sheet set of oversize colorful geologic maps and cross sections presents new interpretations on the outcrop pattern and complex structure within the Upper Cretaceous Del Rio, Buda, Boquillas, Pen, Aguja, Javelina, and Cretaceous-Tertiary Black Peaks Formations of Big Bend National Park. The maps show many of the popular areas for tourist (and field-trip) visitation within the park.

This report provides a detailed review of the stratigraphic and structural attributes and controls on productivity and future potential of the Cleveland Formation and Marmaton Group by integrating chronostratigraphic, depositional-facies, and play analysis. Its authors used a data set consisting of 1,127 wells and 5 conventional cores with ~250 ft of section from the Cleveland Formation, along with production data from more than 900 wells in the Cleveland and Marmaton.