1. Department of Geosciences, Virginia Tech, 4044 Derring Hall, 926 West Campus Drive, Blacksburg, Virginia 24061, didem@vt.edu, wqimin86@vt.edu, hole.vt.edu, mcc@vt.edu, davenport.k42@gmail.com
2. Now at Geophysics Department, Sandia National Laboratories, 701 Stephen Moody Street, SE Apartment 1433, Albuquerque, New Mexico 87123.
3. Now at ConocoPhillips School of Geology and Geophysics, The University of Oklahoma, Sarkeys Energy Center, Suite 710, 100 E. Boyd Street, Norman, Oklahoma 73019.
4. Now at College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, 104 CEOAS Administration Building, Corvallis, Oregon 97331‐5503.
5. Department of Earth and Atmospheric Sciences, Cornell University, 3120 Snee Hall, Ithaca, New York 14853‐1504, ldb7@cornell.edu, daq7@cornell.edu
6. Now at Department of Geosciences, Baylor University, One Bear Place #97354, Waco, Texas 76798.