About the Authors

Daniel J. Field

daniel.field@yale.edu

Affiliation Department of Geology and Geophysics, Yale University, New Haven, Connecticut, United States of America

Liliana D’Alba

Affiliation Department of Biology and Integrated Bioscience Program, University of Akron, Akron, Ohio, United States of America

Jakob Vinther

Affiliations Department of Geology and Geophysics, Yale University, New Haven, Connecticut, United States of America, Departments of Earth and Biological Sciences, Bristol University, Bristol, United Kingdom

Samuel M. Webb

Affiliation Stanford Linear Accelerator Center, Menlo Park, California, United States of America

William Gearty

Affiliation Department of Geology and Geophysics, Yale University, New Haven, Connecticut, United States of America

Matthew D. Shawkey

Affiliation Department of Biology and Integrated Bioscience Program, University of Akron, Akron, Ohio, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: DJF LDA JV MDS. Performed the experiments: DJF LDA JV SMW MDS. Analyzed the data: DJF LDA SMW WG MDS. Contributed reagents/materials/analysis tools: DJF LDA JV SMW MDS. Wrote the paper: DJF LDA JV SMW MDS.