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  • Rupp, Robin F. (U.S. Geological Survey, 2004)
    The surface terrain model of Indiana was created using part of the National Elevation Dataset (NED)—a digital elevation information product for the United States—and newly created digital elevation models (DEMs). New ...
  • Rupp, Robin F.; Olejnik, Jennifer; Hasenmueller, Nancy R.; Walls, A. Chris; Radhakrishnan, Premkrishna; Karaffa, Marni D.; Eaton, Nathan K. (U.S. Geological Survey, 2008)
    The Internet is becoming the medium of choice for delivering geologic information to both technical users and the general public. The Indiana Geological Survey (IGS) is currently creating a Web-based glacial and bedrock ...
  • McDonald, James; Pavey, Richard R.; Venteris, Erik R.; Wells, Joseph G. (U.S. Geological Survey, 2008)
    The Ohio Department of Natural Resources, Division of Geological Survey is currently mapping the surficial geology of Ohio in three dimensions (3-D) using a modified version of the stack-mapping technique of Kempton (1981). ...
  • Aden, D. J. (ODNR Division of Geological Survey, 2013)
    Karst terrain forms by dissolution of carbonate rocks, such as limestone or dolomite, or evaporites, such as gypsum or salt, and is characterized by features including sinkholes, disappearing streams, caves, and springs. ...
  • Aden, D. J.; Martin, D. R. (Ohio Department of Natural Resources, Division of Geological Survey, 2014)
    Karst terrain forms by dissolution of carbonate rocks, such as limestone or dolomite, or evaporites, such as gypsum or salt, and is characterized by features including sinkholes, disappearing streams, caves, and springs. ...

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