Locations of clay and shale operations in Indiana - UC Berkeley GeoData
Locations of clay and shale operations in Indiana
Description:
Includes generalized columnar section, 'Sectionized township,' and index of producers of clay and clay products. 'Base modified from U.S. Geological Survey, Base map of Indiana; 1950.' Scale 1:1,000,000. Compiled by Wiliam M. Webb, March 1967.