{"accessLevel": "public", "bureauCode": ["010:12"], "contactPoint": {"@type": "vcard:Contact", "fn": "Bryan Schaap", "hasEmail": "mailto:bdschaap@usgs.gov"}, "description": "This coverage contains information about the western limit of glaciation within the \nStanding Rock Indian Reservation, Sioux County, North Dakota, and Corson County, \nSouth Dakota. The digital data were produced by the U.S. Geological Survey (USGS) in \ncooperation with the U.S. Environmental Protection Agency.\n\t\t\nFigure 5 in Howells (1982) was scanned and digitized on-screen to create this coverage. \nSee cross reference information for more detail. \n\t\t\nAccording to the map credit for figure 5, the geology for Sioux County was based on \nsoil maps prepared by the U.S. Bureau of Indian Affairs (1959), data collected by \nRandich (1975), and a geologic map by Carlson (1978). The geology for Corson \nCounty was based on soil maps prepared by the U.S. Bureau of Indian Affairs (1959) \nand unpublished maps of the U.S Soil Conservation Service, modified by test drilling \nand field reconnaissance.\n\t\t\nThe following is from the description of the surficial geology by Howells (1982).\n\t\t\nThe surface geology, like the topography, has been strongly influenced by continental \nglaciation and by Pleistocene erosion on a land surface underlain by soft unconsolidated \ndeposits of continental and marine shale and sandstone. The Standing Rock Indian Reservation \nis on the western margin of the midwestern area that was invaded by great ice sheets during \nthe last million years. Though at most only 60 percent of the reservation apparently was \ncovered by glacial ice, the effects of the glaciers were pervasive: not only did the ice sheets \ngrind away the land surface in the areas that they invaded, but they also changed the courses \nof rivers and created a new river--the Missouri. In addition, changes in weather patterns \nassociated with glaciation profoundly influenced streamflow and erosion in the area not reached \nby the ice sheets.\n\t\t\nBecause the Standing Rock Indian Reservation was on the border of the glaciated region, much \nof the area is free of glacial deposits and most of the glacial deposits present are thin, \ndiscontinuous, and of negligible hydrologic importance.", "distribution": [{"@type": "dcat:Distribution", "accessURL": "https://doi.org/10.5066/P90CTOY6", "description": "Landing page for access to the data", "format": "XML", "mediaType": "application/http", "title": "Digital Data"}, {"@type": "dcat:Distribution", "description": "The metadata original format", "downloadURL": "https://data.usgs.gov/datacatalog/metadata/USGS.3a76ef75-8ed9-41bc-b978-8211fb0e3181.xml", "format": "XML", "mediaType": "text/xml", "title": "Original Metadata"}], "identifier": "http://datainventory.doi.gov/id/dataset/USGS_3a76ef75-8ed9-41bc-b978-8211fb0e3181", "keyword": ["Alluvium", "Corson County", "Cretaceous", "North Dakota", "Quaternary", "Sioux County", "South Dakota", "Standing Rock Indian Reservation", "Tertiary", "USGS:3a76ef75-8ed9-41bc-b978-8211fb0e3181", "buried-valley fill", "colluvium", "environment", "eolian deposits", "geoscientificInformation", "glacial till", "inlandWaters", "outwash", "terrace", "western limit glaciation"], "modified": "2020-11-17T00:00:00Z", "publisher": {"@type": "org:Organization", "name": "U.S. Geological Survey"}, "spatial": "-102.023459, 45.455167, -100.515481, 46.429126", "theme": ["geospatial"], "title": "Approximate western limit of glaciation within the Standing Rock Indian Reservation, Sioux County, North Dakota, and Corson County, South Dakota"}