Geologic map of the Stonefort quadrangle, Illinois [cartographic material] / W. John Nelson and D.K. Lumm. Raster Massachusetts Institute of Technology Public content

Description
Relief shown by contours and spot heights. "Contour interval 20 feet." "Base from U.S. Geological Survey, 1966. 10,000-foot grid based on Illinois coordinate system, east zone." "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.
Publisher
Illinois Dept. of Energy and Natural Resources, Illinois State Geological Survey
Year
1990-01-01T00:00:00Z
Held by
MIT
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