The purpose of this bulletin is to furnish to residents of the county and to other interested a constructive guide to the geology of the county, its influence on general development, and its possibilities for exploitation -- Introduction.

"The papers in this volume illustrate unique, but often overlooked, geologic events of the last 300 million years. Rock outcrops and landscapes, ranging in age from Upper Pennsylvanian through the Anthropocene, are presented that address the following themes: cyclothems, a Permian salt giant, Midcontinent kimberlite intrusions, and Midcontinent glaciation"--