Bedrock Geology of Pittsburg Quadrangle, Williamson and Franklin Counties, Illinois

Relief shown by contours and spot heights"Geology based on field work and data analysis by W.J. Nelson, 2001-2003.""Digital cartography and graphics by J. Domier, S. Geegan, T. Goeppinger, and L. Verhelst, Illinois State Geological Survey."Includes location map and quadrangle index diagramData sheet includes text, 1 colored stratigraphic column, and 1 colored cross sectionIncludes bibliographical references (data sheet