About the Authors
- Alexander P. Wolfe, Ryan C. McKellar, Karlis Muehlenbachs
- Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, Canada
- Adam Z. Csank
- Environment and Natural Resources Institute, University of Alaska, Anchorage, Alaska, United States of America
- Alberto V. Reyes
- Department of Geoscience, University of Wisconsin, Madison, Wisconsin, United States of America
- Ralf Tappert
- Institute of Mineralogy and Petrography, University of Innsbruck, Innsbruck, Austria
The authors have declared that no competing interests exist.
Conceived and designed the experiments: APW AZC AVR RCM RT KM. Performed the experiments: APW AZC AVR RCM RT KM. Analyzed the data: APW AZC AVR RCM RT KM. Contributed reagents/materials/analysis tools: APW AZC AVR RCM RT KM. Wrote the paper: APW AZC AVR RCM RT KM. Microscopy: APW. Wood anatomy: ACZ. Cellulose purification: ACZ AVR. FTIR spectroscopy: RCM RT. Isotopic measurements: ACZ AVR RCM RT KM.