Charles H. Shultz, ed., 1999. This is the premier book that provides the most comprehensive and readable reference available about Pennsylvania's geology. This guide is valuable both to scientists who pursue research on this topic and to anyone who is interested in touring Pennsylvania's varied geological features. Well illustrated with charts and diagrams, included among many topics are geologic history, stratigraphy, tectonics, geophysics, physiography, mineral and water resources, environmental and engineering applications, and a brief history of geological investigations in Pennsylvania. Also included is a chapter for the geologic tourist. Published by Pennsylvania Geological Survey and Pittsburgh Geological Society, 888 p., 8-1/2" x 11", references, illus. (incl. photos, maps, charts), index, hardcover.