Acknowledgements
We thank our Russian and German colleagues who helped in fieldwork in
2011 to obtain the samples. Nick Mewes is highly acknowledged for
assistance in the laboratory. We also thank Cathy Jenks for English
language proof reading. This project has received funding from the
European Research Council (ERC) under the European Union’s Horizon 2020
research and innovation programme (grant agreement no. 772852, ERC
consolidator grant ”Glacial Legacy”) and the Initiative and Networking
fund of the Helmholtz Association. LSE was supported by the German
Research Foundation through grant EP98/2-1.