MOELLERS, Lara, Geology, Cornell College, 600 1st Street West, Cornell College, Mount Vernon, IA 52314, DENNISTON, Rhawn F., Geology, Cornell College, 600 1st Street West, Mt. Vernon, IA 52314, CARPENTER, Scott J., Department of Geoscience, University of Iowa, Iowa City, IA 52242, DORALE, Jeffrey A., Geoscience, Univ of Iowa, 121 Trowbridge Hall, Iowa City, IA 52242, POLYAK, Victor J., Earth & Planetary Sciences, Univ of New Mexico, 200 Yale Blvd., Northrop Hall, Albuquerque, NM 87131 and ASMEROM, Yemane, Earth and Planetary Sciences, Univ of New Mexico, Northrop Hall, Albuquerque, NM 87131, L-Moellers@cornellcollege.edu, L-Moellers@cornellcollege.edu