1. Department
of Geology, Wichita State University, Wichita, Kansas 67260, United States
2. School
of Geology and Geophysics, University of Oklahoma, Norman Oklahoma 73019, United States
3. U.S. Geological Survey, Reston, Virginia 20192, United States
4. Nano-Bio
Materials Characterization Facility, University of Arkansas, Fayetteville, Arkansas 72701, United States