1. Assistant Professor, Dept. of Geology and Geophysics, Geological Engineering Program, Univ. of Utah, 115 South 1460 East Rm. 383, Salt Lake City, UT 84112-0101 (corresponding author).,
2. Graduate Student, Dept. of Geology and Geophysics, Geological Engineering Program, Univ. of Utah, 115 South 1460 East Rm. 383, Salt Lake City, UT 84112-0101.