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Triceratops bones found near base of Lance formation in SE Sec. 20, T. 21 N., R. 23 E.; leg bone and vertebra, length of large bone 18 inches. Corson County, South Dakota. 1909. Plate 7-A in U.S. Geological Survey Bulletin 575. 1914.
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These data were released prior to the October 1, 2016 effective date for the USGS’s policy dictating the review, approval, and release of scientific data as referenced in USGS Survey Manual Chapter 502.8 Fundamental Science Practices: Review and Approval of Scientific Data for Release. This coverage contains information about the buried valleys within the Standing Rock Indian Reservation, Sioux County, North Dakota, and Corson County, South Dakota. The delineation of the buried valleys was included as part of the surficial geology map (figure 5) created by Howells (1982). The digital data were produced by the U.S. Geological Survey (USGS) in cooperation with the U.S. Environmental Protection Agency. Figure 5 in...
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Surface of upland in Standing Rock and Cheyenne River Indian Reservations north of McIntosh, in T. 23 N., R. 22 E. Corson County, South Dakota. 1909. Plate 3-A in U.S. Geological Survey. Bulletin 575. 1914.


    map background search result map search result map Surface of upland in Standing Rock and Cheyenne River Indian Reservations. Corson County, South Dakota. 1909. Triceratops bones found near base of Lance formation. Corson County, South Dakota. 1909. Buried valleys within the Standing Rock Indian Reservation, Sioux County, North Dakota, and Corson County, South Dakota Buried valleys within the Standing Rock Indian Reservation, Sioux County, North Dakota, and Corson County, South Dakota Surface of upland in Standing Rock and Cheyenne River Indian Reservations. Corson County, South Dakota. 1909. Triceratops bones found near base of Lance formation. Corson County, South Dakota. 1909.