SANCHEZ BOTERO, Carlos Andres, Missouri University of Science and Technology, 129 McNutt Hall, 1400 N Bishop Ave, Rolla, MO 65409, casmwc@mail.mst.edu, OBOH-IKUENOBE, Francisca E., Geological Sciences and Engineering, Missouri University of Science and Technology, 129 McNutt Hall, Rolla, MO 65409, BENISON, Kathleen C., Geology and Geography, West Virginia University, 330 Brooks Hall, 98 Beechurst Street, Morgantown, WV 26506-6300, and BOWEN, Brenda B., Global Change and Sustainability Center, University of Utah, Salt Lake City, UT 84112