About the Authors

Sherie C. Harding

sherie.harding@utah.edu

Affiliation Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, United States of America

Barbara P. Nash

Affiliation Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, United States of America

Erich U. Petersen

Affiliation Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, United States of America

A. A. Ekdale

Affiliation Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, United States of America

Christopher D. Bradbury

Affiliation Department of Geology and Geophysics, University of Utah, Salt Lake City, Utah, United States of America

M. Darby Dyar

Affiliation Department of Astronomy, Mount Holyoke College, South Hadley, Massachusetts, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: SCH AAE. Performed the experiments: SCH BPN EUP CDB MDD. Analyzed the data: SCH BPN EUP CDB. Contributed reagents/materials/analysis tools: BPN EUP MDD. Wrote the paper: SCH BPN EUP AAE CDB MDD.