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Bentonite deposits of the northern Black Hills district, Wyoming, Montana, and South Dakota
Maxwell M. Knechtel, Sam H. Patterson
1962, Bulletin 1082-M
The northern Black Hills bentonite mining district includes parts of Crook County, Wyo., Carter County, Mont., and Butte County, S. Dak. Within this district, many beds of bentonite occur interspersed with sedimentary strata of Cretaceous age that have an average total thickness of about 3,000 feet and consist chiefly of...
Floods at Canton, Ohio
Water Resources Division, U.S. Geological Survey
1962, Hydrologic Atlas 50
No abstract available....
The meteorologic phenomenon of drought in the Southwest
H. E. Thomas
1962, Professional Paper 372-A
The recent drought is one of several which have been recorded in the arid Southwest in the past century. In regions where precipitation comes chiefly from a single source, as in California and the Great Plains, prevailingly dry periods have alternated with wetter periods, each lasting 10 to 15 years....