About the Authors
- Douglas A. Burns
-
* E-mail: daburns@usgs.gov
Affiliation United States Geological Survey, Troy, New York, United States of America
- Laurel G. Woodruff
-
Affiliation United States Geological Survey, Mounds View, Minnesota, United States of America
- Paul M. Bradley
-
Affiliation United States Geological Survey, Columbia, South Carolina, United States of America
- William F. Cannon
-
Affiliation United States Geological Survey, Reston, Virginia, United States of America
Competing Interests
The authors have declared that no competing interests exist.
Author Contributions
Conceived and designed the experiments: DAB LGW PMB WFC. Performed the experiments: DAB LGW PMB WFC. Analyzed the data: DAB LGW PMB WFC. Contributed reagents/materials/analysis tools: DAB LGW PMB WFC. Wrote the paper: DAB LGW PMB WFC.