Big Ten Academic Alliance Geospatial Discovery Portal

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141. Sand and Gravel Resource Potential in Mapped Surficial Material: Indiana, 2003

2003. Indiana Geological Survey and Christina James (digital compiler). SAND_GRAVEL_RESOURCES_IN is a polygon shapefile that identifies sand and gravel permissive tracts in the surficial unconsolidated deposits of India...

142. Seismic Refraction Data for Indiana: Indiana, 2002

2002. Karen K. Like (database compiler), Robert F. Blakely (author), Indiana Geological Survey, Joseph F. Whaley (author), and Christina L. James (digital compiler). SEISMIC_DATA_IN is a point shapefile created from a shapefile named SEISMIC_DATA, which was derived from a Microsoft Excel spreadsheet named SEISMI...

143. Shaded Relief map: Illinois, 2006

1995. Abert, Curtis C. This raster dataset shows the landforms of Illinois with a shaded relief portrayal. Cell size is 301 feet and nominal map scale is 1:250,000. The d...

144. Shrink-Swell Characteristics, Derived from STATSGO: Indiana, 2002

2002. Indiana Geological Survey. The 1994 State Soil Geographic (STATSGO) database for Indiana, obtained from the U.S. Department of Agriculture (USDA), Natural Resources Conservat...

145. Silurian Reef Locations (Point): Indiana, 2003

2003. Indiana Geological Survey, John B. Droste (data compiler), Stanley J. Keller (data compiler), Robert H. Shaver (data compiler), Curtis H. Ault (data compiler), Leroy E. Becker (data compiler), and Chris Dintaman (digital compiler). SILURIAN_REEF_POINTS_MM54_IN is a point shapefile that shows the locations of Silurian rock reef formations in Indiana. These data include five cat...

146. Silurian Reef Locations (Polygon): Indiana, 2003

2003. Indiana Geological Survey, John B. Droste (data compiler), Stanley J. Keller (data compiler), Curtis H. Ault (data compiler), Robert H. Shaver (data compiler), Leroy E. Becker (data compiler), and Chris Dintaman (digital compiler). SILURIAN_REEF_POLYGONS_MM54_IN is a polygon shapefile that shows the general locations of Silurian rock reef bank formations in Indiana. These data...

147. Sinkhole Areas (an indicator of karst terrain): Illinois, 2004

1992. C. P. Weibel and S. V. Panno. This feature class shows the distribution of areas that contain one or more sinkholes throughout the state of Illinois. Areas that contain sinkhole...

148. Sinkhole inventory for southern Indiana and northern Kentucky: Indiana, 2011

2011. Indiana Geological Survey (IGS), United States Forest Service (USFS), Center for Geospatial Data Analysis (CGDA), and Sally L. Letsinger (data compiler). This point shapefile was created to display in a geographic information system (GIS) mapped and modeled (indirectly mapped) sinkhole locations in s...

149. Southern extent of glaciation: Indiana, 2010

2010. Henry H. Gray (Data compiler), Sally L. Letsinger (GIS compiler), Center for Geospatial Data Analysis (CGDA), and Indiana Geological Survey. PRE-WISCONSIN_GLACIAL_LIMIT_IN.shp is a line shapefile that shows the extent of glaciation in Indiana as delineated by mapped glacial deposits of v...

150. Springs in: Minnesota

2017. University of Minnesota, Department of Geology and Geophysics; Minnesota Department of Natural Resources (DNR), Ecological and Water Resources Division. Inventory of springs in Minnesota. These data are collected and compiled by the Minnesota DNR as a tool to help create awareness of and appreciatio...

151. Stack-Unit Mapping of Geologic Materials to a Depth of 15 Meters: Illinois, 2004

1995. Illinois State Geological Survey. This is an SDE polygon feature class containing stack-unit map designations for Illinois. The primary source is ISGS Circular 542, Stack-unit Mappi...

152. State Soil Geographic (STATSGO) Database: Susquehanna River Basin, 2006

2006. SRBC. This dataset is a digital general soil association map for the Susquehanna River Basin (2006 boundary) developed by the National Cooperative Soil S...

153. Structural Features - Faults: Illinois, 1995

1995. Illinois State Geological Survey. This is a partial representation of Plate 1 from ISGS Bulletin 100 (1993). Features depicted are limited to well documented, significant faults, fa...

154. Structural Features: Illinois, 1995

1995. Illinois State Geological Survey. This feature dataset is a representation of Plate 1 from ISGS Bulletin 100 (1993) by W. John Nelson. Features depicted are limited to well document...

155. Structural Features: Indiana, 2013

2013. Indiana Geological Survey. STRUCTURAL_FEATURES_IN.SHP is a line shapefile that shows the location of known structural features in Indiana. Attributes include the name of the ...

156. Structural Features- Line Features (Axial or Flexure) of Anticlines, Synclines and Monoclines: Illinois, 1995

1995. Illinois State Geological Survey. This is a partial representation of Plate 1 from ISGS Bulletin 100 (1993). Features depicted are limited to well documented, significant anticlines...

157. Surface Coal Mines: Indiana, 2010

2010. Becky Meyer (Data compiler), Licia Weber (Data compiler), Nathan Eaton (GIS compiler), Indiana Geological Survey, and Paul Irwin (GIS compiler). COAL_MINE_SURFACE_IN is a polygon-based ESRI ArcGIS shapefile that shows the location and extent of surface coal mines in the coal region of west-c...

158. Surficial Geology: Wasington County, Minnesota

2016. Washington County Public Works. Shapefile of surficial geology of Washington County. Digitized from 1:100,000 scale paper version of County Atlas surficial geology map of surface ...

159. Surficial Sands: Minnesota

2016. Minnesota Department of Natural Resources, County Geologic Atlas Program. This dataset estimates the distribution of surficial sand units in Minnesota, from previously published surficial geology maps by the Minnesota Geo...

160. Thickness of Glacial Deposits, Western Crawford County, Pennsylvania: Pennsylvania, 2010

2010. Allegheny College. Digitized sediment thickness map for western Crawford County, Pennsylvania. (The term western applies to all portions of the county west of 80 degr...