. Bulletin of the Southern California Academy of Sciences. Science; Natural history; Natural history. Medicine Root Gravel 255 vey (George V Cohee, pers. communication) and is proposed as an informal name in accordance with the Code of Stratigraphic No- menclature (American Commission on Stratigraphic Nomenclature, 1961). The type area is here designated as that area represented in Figure 2. The exposures of the Medicine Root gravel mark the course of an ancient Black Hills drainageway (Fig. IB). This river was probably the major drainage of the southern Black Hills until the Cheyenne captured
. Bulletin of the Southern California Academy of Sciences. Science; Natural history; Natural history. Medicine Root Gravel 255 vey (George V Cohee, pers. communication) and is proposed as an informal name in accordance with the Code of Stratigraphic No- menclature (American Commission on Stratigraphic Nomenclature, 1961). The type area is here designated as that area represented in Figure 2. The exposures of the Medicine Root gravel mark the course of an ancient Black Hills drainageway (Fig. IB). This river was probably the major drainage of the southern Black Hills until the Cheyenne captured the entire Black Hills drainage system. The probable time and possible reasons for the capture of the Black Hills drainages by the Cheyenne River has been discussed by Todd (1902) and Wanless (1923). In this report there are references to both the Medicine Root River and to Medicine Root Creek. To avoid misunderstanding, it should. Figure 2. Type area for the Medicine Root gravel. The area represented above is in'^T 40 N., R. 42 W, Shannon County, South Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Southern California Academy of Sciences. Los Angeles, Calif. : The Academy
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