Geologic map of the Creal Springs quadrangle, Illinois [cartographic material] / C. Brian Trask and Russell J. Jacobson.
Relief shown by contours and spot heights. "Contour interval 10 feet." "Geology compiled 1980 to 1987." "Prepared in cooperation with the U.S. Geological Survey, Dallas L. Peck, Director, under the Cooperative Geologic Mapping Program (COGEOMAP)." Includes text, col. stratigraphic column, col. cross section and index and location maps.
- Illinois Dept. of Energy and Natural Resources, Illinois State Geological Survey
- Held by
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