About the Authors

Michael Stich

mstich@fas.harvard.edu

Affiliation Department of Earth and Planetary Sciences, Harvard University, Cambridge, Massachusetts, United States of America

Gourab Ghoshal

Affiliation Department of Earth and Planetary Sciences, Harvard University, Cambridge, Massachusetts, United States of America

Juan Pérez-Mercader

Affiliations Department of Earth and Planetary Sciences, Harvard University, Cambridge, Massachusetts, United States of America, The Santa Fe Institute, Santa Fe, New Mexico, United States of America

Competing Interests

The study was supported by Repsol S. A. There are no employment, consultancy, patents, products in development and this does not alter the authors' adherence to all the PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: MS GG JPM. Performed the experiments: MS GG. Analyzed the data: MS GG JPM. Contributed reagents/materials/analysis tools: MS GG. Wrote the paper: MS GG JPM.