About the Authors
- Jeffrey W. Martz
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* E-mail: typothorax@gmail.com
Affiliation Division of Resource Management, Petrified Forest National Park, Petrified Forest, Arizona, United States of America
- William G. Parker
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Affiliation Division of Resource Management, Petrified Forest National Park, Petrified Forest, Arizona, United States of America
Competing Interests
The authors have declared that no competing interests exist.
Author Contributions
Conceived and designed the experiments: JWM. Performed the experiments: JWM WGP. Analyzed the data: JWM WGP. Wrote the paper: JWM.