Janet Carter 2009 vector digital data http://water.usgs.gov/lookup/getspatial?sim2993_arkr_abs Janet M. Carter and Allen J. Heakin 2008 map Scientific Investigations Map 2993 Reston, VA U.S. Geological Survey http://pubs.usgs.gov/sim/2993/ This data set describes the area within the Pine Ridge Indian Reservation where the Arikaree aquifer (Arikaree Formation) is absent. This absent area includes areas where the Arikaree Formation has been eroded and where outcrops of geologic units older than the Arikaree Formation are present at the land surface. This data set was created as part of a project to map the potentiometric surface of the Arikaree aquifer in the Pine Ridge Indian Reservation and Bennett County. In 1998, the U.S. Geological Survey began working in cooperation with the Oglala Sioux Tribe to develop a potentiometric map of the Arikaree aquifer in Jackson and Shannon counties. In 2003, the study area was expanded to include Bennett County. This data set was subjected to the same review standard that applies to all U.S. Geological Survey publications. Reviewers were asked to check the topological consistency, tolerances, attribute frequencies and statistics, projection, and geographic extent. The reviewers checked the metadata files for completeness and accuracy. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. 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 ESRI ArcInfo Coverage specific terminology. 1971 ground condition Complete None planned -103.019309 -101.177256 43.838315 42.957408 None geology inlandWaters Arikaree aquifer None Pine Ridge Indian Reservation Bennett County Shannon County Jackson County South Dakota None Arikaree Formation None Tertiary None These data should not be used at scales larger than 1:125,000. Janet Carter U.S. Geological Survey Hydrologist mailing and physical address

1608 Mt. View Road

Rapid City SD 57702 USA 605 394-3215 605 355-4523 jmcarter@usgs.gov Compilation of this coverage and associated metadata was performed in cooperation with the Oglala Sioux Tribe. Public Unclassified None Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.3.1.1850 M.J. Ellis and D.G. Adolphson 1971 map Hydrologic Investigations Atlas HA-357 Reston, VA U.S. Geological Survey Polygon and chain-node topology are present. This data set consists of polygons representing areas where the Arikaree aquifer is absent within the Pine Ridge Indian Reservation. A visual check was made against a scanned copy from the U.S. Geological Survey's Publications Warehouse at http://pubs.er.usgs.gov/usgspubs/ha/ha357. All boundaries were found to be within 250 meters. M.J. Ellis and D.G. Adolphson 1971 map Hydrologic Investigations Atlas HA-357 Reston, VA U.S. Geological Survey 125,000 paper 1971 publication date Ellis and Adolphson (1971) Ellis and Adolphson (1971) This product is the digital version of the area where the Arikaree aquifer is absent depicted on sheet 1 of Scientific Investigations Map 2993. STEP 1: The map by Ellis and Adolphson (1971) was digitized by the U.S. Geological Survey using a digitizing tablet. The following geologic units were digitized: Qfa (flood-plain alluvium), Qta (terrace alluvium), Qwd (windblown sand deposits), Qot (old terrace deposits), To (Ogallala Formation), Ta (Arikaree Formation), Twr (White River Group), Kp (Pierre Shale), Kn (Niorbrara Formation), and Kc (Carlile Shale). STEP 2: Polygons of the geologic units that are older than the Arikaree Formation (White River Group, Pierre Shale, Niobrara Formation, and Carlile Shale) were merged together. STEP 3: Polygons of alluvial deposits that overlie geologic units older than the Arikaree Formation (White River Group, Pierre Shale, Niobrar Formation, and Carlile Shale) were split into two polygons by adding an arc at the interpolated underlying boundary between the older geologic unit and the outrcrop of the Arikaree Formation and then rebuilding the coverage as a polygon coverage. The split alluvial polygons that represent the alluvial deposits overlying formations older than the Arikaree Formation were merged with the polygons of the older geologic units to form polygon areas where the Arikaree Formation is absent. 20090209 Janet Carter U.S. Geological Survey Hydrologist mailing and physical address

1608 Mt. View Road

Rapid City SD 57702 USA 605 394-3215 605 355-4523 jmcarter@usgs.gov Dataset moved. Z:\pineridge\gis\SIM2993FinalGIS\Shp83\arkr_abs\arkr_abs 20090812 10594600 Vector G-polygon 10 Label point 9 GT-polygon composed of chains 10 Point 4 Universal Transverse Mercator 13 0.999600 -105.000000 0.000000 500000.000000 0.000000 coordinate pair 0.000128 0.000128 meters North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 arkr_abs Area where Arikaree aquifer is absent, Pine Ridge Indian Reservation and Bennett County, South Dakota U.S. Geological Survey FID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. AREA Area of feature in internal units squared. ESRI Positive real numbers that are automatically generated. PERIMETER Perimeter of feature in internal units. ESRI Positive real numbers that are automatically generated. ABSENT Area where the Arikaree aquifer is absent or present U.S. Geological Survey YES Arikaree aquifer is absent U.S. Geological Survey NO Arikaree aquifer is present U.S. Geological Survey arkr_abs.pat Area where Arikaree aquifer is absent, Pine Ridge Indian Reservation and Bennett County, South Dakota U.S. Geological Survey FID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. AREA Area of feature in internal units squared. ESRI Positive real numbers that are automatically generated. PERIMETER Perimeter of feature in internal units. ESRI Positive real numbers that are automatically generated. ARKR_ABS# Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. ARKR_ABS-ID User-defined feature number. ESRI Sequential unique whole numbers that are automatically generated. ABSENT Area where the Arikaree aquifer is absent or present USGS absent The Arikaree aquifer is absent USGS present The Arikaree aquifer is present USGS U.S. Geological Survey Ask USGS - Water Webserver Team mailing address

445 National Center

Reston VA 20192 USA 1-888-275-8747 http://answers.usgs.gov/cgi-bin/gsanswers?pemail=h2oteam&subject=GIS+Dataset+sim2993_arkr_abs Downloadable Data Although this data set has been used by the U.S. Geological Survey, U.S. Department of 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. shape file winzip 0.170 http://water.usgs.gov/GIS/dsdl/sim2993_arkr_abs.zip None. 20090813 U.S. Geological Survey Ask USGS - Water Webserver Team mailing address

445 National Center

Reston VA 20192 USA 1-888-275-8747 (1-888-ASK-USGS) http://water.usgs.gov/user_feedback_form.html FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 local time None Although this Federal Geographic Data Committee (FGDC) compliant metadata file is intended to document the data set in nonproprietary form, as well as Environmental Systems Research, Inc. (ESRI) ArcGIS format, this metadata file may include some ArcGIS-specific terminology. Acknowledgment of the U.S. Geological Survey and the Oglala Sioux Tribe would be appreciated in products derived from these data. Public Unclassified None http://www.esri.com/metadata/esriprof80.html ESRI Metadata Profile