Bryan Schaap 2004 vector digital data Data Series USGS DS 102 Reston, Virginia U.S. Geological Survey Figure 5 (sheet 1) in Howells (1982) was scanned and digitized on-screen to create this coverage. This figure was published at a scale of about 1:250,000. http://water.usgs.gov/lookup/getspatial?ds102_glac_limit This coverage contains information about the western limit of glaciation within the Standing Rock Indian Reservation, Sioux County, North Dakota, and Corson County, South Dakota. The digital data were produced by the U.S. Geological Survey (USGS) in cooperation with the U.S. Environmental Protection Agency. Figure 5 in Howells (1982) was scanned and digitized on-screen to create this coverage. See cross reference information for more detail. According to the map credit for figure 5, the geology for Sioux County was based on soil maps prepared by the U.S. Bureau of Indian Affairs (1959), data collected by Randich (1975), and a geologic map by Carlson (1978). The geology for Corson County was based on soil maps prepared by the U.S. Bureau of Indian Affairs (1959) and unpublished maps of the U.S Soil Conservation Service, modified by test drilling and field reconnaissance. The following is from the description of the surficial geology by Howells (1982). The surface geology, like the topography, has been strongly influenced by continental glaciation and by Pleistocene erosion on a land surface underlain by soft unconsolidated deposits of continental and marine shale and sandstone. The Standing Rock Indian Reservation is on the western margin of the midwestern area that was invaded by great ice sheets during the last million years. Though at most only 60 percent of the reservation apparently was covered by glacial ice, the effects of the glaciers were pervasive: not only did the ice sheets grind away the land surface in the areas that they invaded, but they also changed the courses of rivers and created a new river--the Missouri. In addition, changes in weather patterns associated with glaciation profoundly influenced streamflow and erosion in the area not reached by the ice sheets. Because the Standing Rock Indian Reservation was on the border of the glaciated region, much of the area is free of glacial deposits and most of the glacial deposits present are thin, discontinuous, and of negligible hydrologic importance. This coverage was prepared to assist the Standing Rock Sioux Tribe in developing a pesticide management plan. This electronic report was subjected to the same review standard that applies to all U.S. Geological Survey reports. Reviewers were asked to check the topological consistency, tolerances, attribute frequencies and statistics, projection and geographic extent. The reviewers checked the metadata and readme files for completeness and accuracy. Although this Federal Geographic Data Committee-compliant metadata file is intended to document the data set in nonproprietary form, as well as in ARC/INFO format, this metadata file may include some ARC/INFO-specific terminology. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. 1982 ground condition Complete None planned -102.023459 -100.515481 46.429126 45.455167 None. western limit glaciation inlandWaters Standing Rock Indian Reservation, Sioux County, North Dakota, Corson County, South Dakota Quaternary None. None. U.S. Geological Survey Bryan Schaap Hydrologist 605-352-4241 605-352-4304 bdschaap@usgs.gov Compilation of this coverage and associated metadata was performed in cooperation with the U.S. Environmental Protection Agency. Microsoft Windows 2000 Version 5.1 (Build 2600) Service Pack 1; ESRI ArcCatalog 8.3.0.800 L.W. Howells 1982 map Hydrologic Investigations Atlas U.S. Geological Survey Hydrologic Investigations Atlas HA-644 U.S. Geological Survey The base map was 1:250,000 USGS quadrangles. Multiple visual checks were done to verify that the attribute data were coincident with the original map source. Chain-node topology present. This data set consists of an arc delineating the approximate western limit of glaciation within the Standing Rock Indian Reservation, Sioux County, North Dakota, and Corson County, South Dakota. L.W. Howells 1982 map Hydrologic Investigations Atlas U.S. Geological Survey Hydrologic Investigations Atlas HA-644 The base map was 1:250,000 USGS quadrangles. 1:250,000 paper This product is the digital version of the approximate western limit of glaciation in Sheet 1, figure 5 of HA-644. STEP 1: The map was scanned by the South Dakota Geological Survey and the image file was sent to the USGS on a CD. STEP 2: The image file was registered using 22 points with an rms of 78.1 meters. A new rectified image file was created with a cell size of 22.7 meters using the nearest neighbor option. STEP 3: An arc coverage was created by digitizing on-screen using the rectified image file as the background. 2004 Bryan Schaap U.S. Geological Survey Hydrologist mailing and physical address

111 Kansas Ave SE

Huron South Dakota 57350 USA 605-352-4241 605-352-4304 bdschaap@usgs.gov The first draft of the metadata was created by Bryan Schaap using ArcCatalog on ARC/INFO data set /home/bds/standing_rock/report/glac_limit. 2004 Vector Complete chain 1 Point 4 GT-polygon composed of chains 539 Point 4 Universal Transverse Mercator 14 0.999600 -99.000000 0.000000 500000.000000 0.000000 coordinate pair 0.000256 0.000256 meters North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 glac_limit.aat FID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. FNODE# Internal node number for the beginning of an arc (from-node). ESRI Whole numbers that are automatically generated. TNODE# Internal node number for the end of an arc (to-node). ESRI Whole numbers that are automatically generated. LPOLY# Internal node number for the left polygon. ESRI Whole numbers that are automatically generated. RPOLY# Internal node number for the right polygon. ESRI Whole numbers that are automatically generated. LENGTH Length of feature in internal units. ESRI Positive real numbers that are automatically generated. GLAC_LIMIT# Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. GLAC_LIMIT-ID User-defined feature number. ESRI Sequential unique whole numbers that are automatically generated. LIMIT Howells (1982), plate 1, figure 5 Approximate western limit of glaciation U.S. Geological Survey Ask USGS - Water Webserver Team mailing

445 National Center

Reston VA 20192 1-888-275-8747 (1-888-ASK-USGS) http://water.usgs.gov/user_feedback_form.html Although this data set has been used by the U.S. Geological Survey, U.S. Department of the Interior, no warranty expressed or implied is made by the U.S. Geological Survey as to the accuracy of the data and related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey in the use of this data, software, or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Export Full coverage zipped 1 http://water.usgs.gov/GIS/dsdl/glac_limit.e00.gz None. This dataset is provided by USGS as a public service. 20041108 U.S. Geological Survey Ask USGS -- Water Webserver Team mailing

445 National Center

Reston VA 20192 1-888-275-8747 (1-888-ASK-USGS) http://answers.usgs.gov/cgi-bin/gsanswers?pemail=h2oteam&subject=GIS+Dataset+ds102_glac_limit FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998