The Leonardian Spraberry Formation is a major oil-producing formation of the Permian Basin, accounting for more than 700 million barrels of oil produced from heterogeneous submarine-fan reservoirs. Extensive exploration and development of the Spraberry and deeper reservoirs provide the opportunity to establish the sedimentary evolution of a fan cone fed only by relatively small rivers and windblown sediment in a tectonically inactive setting.

Written in an informal style for a nontechnical audience, this guide summarizes geologic features and history of McKinney Falls State Park, just south of Austin, Texas. Part guidebook and part geologic text, the book surveys Pilot Knob, the McKinney Gristmill, the Balcones Fault Zone, natural potholes, the Smith rock shelter, "Old Baldy," and the waterfalls in the park. Includes maps and photos.

Of the more than 19,000 documented leaking petroleum storage tank (LPST) sites in Texas, more than 6,000 have impacted ground water and resulted in fuel hydrocarbon (FHC) plumes. The sheer number of regulated facilities and their wide geographical distribution throughout the state, however, have made gaining a regional perspective on hydrocarbon plumes difficult.