Erin C Berns, University of Texas at Austin, Austin, TX, United States, Jilong Lin, University of Texas at Austin, Geological Sciences, Austin, TX, United States, Robert A. Sanford, University of Illinois at Urbana-Champaign, Department of Geology, Urbana, IL, United States, Albert J Valocchi, University of Illinois at Urbana-Champaign, Urbana, IL, United States, Timm J Strathmann, Colorado School of Mines, Golden, CO, United States, Charles E Schaefer, CDM Smith, Edison, NJ, United States and Charles J Werth, Univ Illinois Urbana Champaign, Urbana, IL, United States