About the Authors

Ainara Sistiaga

msistiag@ull.es

Affiliations Department of Geography and History, University of La Laguna, Tenerife, Spain, Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, Massachusetts, United States of America, Instituto Universitario de Bio-Orgánica Antonio González, La Laguna, Tenerife, Spain

Carolina Mallol

Affiliations Department of Geography and History, University of La Laguna, Tenerife, Spain, Instituto Universitario de Bio-Orgánica Antonio González, La Laguna, Tenerife, Spain

Bertila Galván

Affiliation Department of Geography and History, University of La Laguna, Tenerife, Spain

Roger Everett Summons

Affiliation Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, Massachusetts, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: AS CM RES. Performed the experiments: AS RES. Analyzed the data: AS CM RES. Contributed reagents/materials/analysis tools: RES. Wrote the paper: AS CM RES. Provide samples: AS BG.