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Palaeoenvironmental interpretation of yedoma silt (ice complex) deposition as cold-climate loess, Duvanny Yar, northeast Siberia

journal contribution
posted on 2023-06-09, 05:06 authored by Julian MurtonJulian Murton, Tomasz Goslar, Mary E Edwards, Mark D Bateman, Petr P Danilov, Grigoriy N Savvinov, Stanislav V Gubin, Bassam Ghaleb, James Haile, Mikhail Kanivskiy, Anatoly V Lozhkin, Alexei V Lupachev, Della K Murton, Yuri Shur, Alexei Tikhonov, Alla C Vasil'chuk, Yurij K Vasil'chuk, Stephen A Wolfe
Uncertainty about the geological processes that deposited syngenetically frozen ice-rich silt (yedoma) across hundreds of thousands of square kilometres in central and northern Siberia fundamentally limits our understanding of the Pleistocene geology and palaeoecology of western Beringia, the sedimentary processes that led to sequestration of hundreds of Pg of carbon within permafrost and whether yedoma provides a globally significant record of ice-age atmospheric conditions or just regional floodplain activity. Here, we test the hypotheses of aeolian versus waterlain deposition of yedoma silt, elucidate the palaeoenvironmental conditions during deposition and develop a conceptual model of silt deposition to clarify understanding of yedoma formation in northern circumpolar regions during the Late Pleistocene. This is based on a field study in 2009 of the Russian stratotype of the ‘Yedoma Suite’, at Duvanny Yar, in the lower Kolyma River, northern Yakutia, supplemented by observations that we have collected there and at other sites in the Kolyma Lowland since the 1970s. We reconstruct a cold-climate loess region in northern Siberia that forms part of a vast Late Pleistocene permafrost zone extending from northwest Europe across northern Asia to northwest North America, and that was characterised by intense aeolian activity.

History

Publication status

  • Published

File Version

  • Published version

Journal

Permafrost and Periglacial Processes

ISSN

1045-6740

Publisher

Wiley

Issue

3

Volume

26

Page range

208-288

Department affiliated with

  • Geography Publications

Full text available

  • No

Peer reviewed?

  • Yes

Legacy Posted Date

2017-02-09

First Compliant Deposit (FCD) Date

2021-03-04

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