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History
- Published online December 22, 2012.
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© 2012 American Journal of Science
Author Information
- *Department of Geosciences, Virginia Tech, Blacksburg, Virginia 24061, USA
- **Department of Earth and Environmental Sciences, University of Kentucky, Lexington, Kentucky 40506-0053, USA
- ***Department of Earth and Planetary Sciences, and Science Alliance Center of Excellence, University of Tennessee, Knoxville, Tennessee 37996-1410, USA
- §Department of Earth and Space Sciences, University of California, Los Angeles, Los Angeles, California 90095-1567, USA
- Corresponding author: A. Krishna Sinha: pitlab{at}vt.edu; phone: 540-231-5580