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Rockwell Formation : ウィキペディア英語版 | Rockwell Formation
The Rockwell Formation is a late Devonian and early Mississippian mapped bedrock unit in West Virginia, Maryland, and Pennsylvania, in the United States. ==Description== The Rockwell Formation was described at its type section at Rockwell Run in West Virginia as soft arkosic sandstone, fine hard conglomerate, and buff hackly shale.〔 The formation was originally described in West Virginia by Stose and Swartz (1912).〔 It was first described in Maryland by H. E. Vokes (1957),〔Vokes, H.E., 1957, Geography and geology of Maryland: Maryland Geological Survey Bulletin, no. 19, p. 243.〕 and later described in central Pennsylvania by C. R. Wood (1980).〔Wood, C.R., 1980, Summary groundwater resources of Centre County, Pennsylvania: Pennsylvania Geological Survey Water Resource Report, 4th series, no. 48, p. 60.〕
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