Articles | Volume 69, issue 1
https://doi.org/10.5194/egqsj-69-33-2020
https://doi.org/10.5194/egqsj-69-33-2020
Research article
 | 
25 May 2020
Research article |  | 25 May 2020

The genesis of Yedoma Ice Complex permafrost – grain-size endmember modeling analysis from Siberia and Alaska

Lutz Schirrmeister, Elisabeth Dietze, Heidrun Matthes, Guido Grosse, Jens Strauss, Sebastian Laboor, Mathias Ulrich, Frank Kienast, and Sebastian Wetterich

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Latest update: 14 Nov 2024
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Short summary
Late Pleistocene Yedoma deposits of Siberia and Alaska are prone to degradation with warming temperatures. Multimodal grain-size distributions of >700 samples indicate varieties of sediment production, transport, and deposition. These processes were disentangled using robust endmember modeling analysis. Nine robust grain-size endmembers characterize these deposits. The data set was finally classified using cluster analysis. The polygenetic Yedoma origin is proved.