About the Authors
- Andrew T. McDonald
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* E-mail: atmcdonald28@gmail.com
Affiliation Earth Sciences, Saint Louis Science Center, Saint Louis, Missouri, United States of America
- Carl E. Campbell
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Affiliation Geology, St. Louis Community College-Meramec, Saint Louis, Missouri, United States of America
- Brian Thomas
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Affiliation Earth Sciences, Saint Louis Science Center, Saint Louis, Missouri, United States of America
Competing Interests
The authors have declared that no competing interests exist.
Author Contributions
Conceived and designed the experiments: ATM CEC BT. Performed the experiments: ATM CEC BT. Analyzed the data: ATM CEC BT. Contributed reagents/materials/analysis tools: ATM CEC BT. Wrote the paper: ATM CEC.