National Geologic Map Database
General Information
- Title: Swelling clays map of the conterminous United States
- Author(s): Olive, W.W., Chleborad, A.F., Frahme, C.W., Shlocker, Julius, Schneider, R.R., and Schuster, R.L.
- Publishing Organization: U.S. Geological Survey
- Series and Number: Miscellaneous Investigations Series Map I-1940
- Publication Date: 1989
- Map Scale: 1:7,500,000
- Cross Section: None
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