About the Authors

J. Alistair Crame

jacr@bas.ac.uk

Affiliation British Antarctic Survey, Natural Environment Research Council, Cambridge, United Kingdom

Alan G. Beu

Affiliation GNS Science, Lower Hutt, New Zealand

Jon R. Ineson

Affiliation Geological Survey of Denmark and Greenland, Copenhagen, Denmark

Jane E. Francis

Affiliation British Antarctic Survey, Natural Environment Research Council, Cambridge, United Kingdom

Rowan J. Whittle

Affiliation British Antarctic Survey, Natural Environment Research Council, Cambridge, United Kingdom

Vanessa C. Bowman

Affiliation British Antarctic Survey, Natural Environment Research Council, Cambridge, United Kingdom

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: JAC AGB JRI JEF RJW VCB. Performed the experiments: JAC AGB JRI JEF RJW VCB. Analyzed the data: JAC AGB. Contributed reagents/materials/analysis tools: JAC AGB JRI JEF RJW VCB. Wrote the paper: JAC AGB JRI JEF RJW VCB.