A late Pleistocene glacial maximum during MIS 3 in the Chersky Mountains, central northeast Siberia

Nørgaard, J.; Margold, M.; Jansen, J.D.; Szuman, I.; Lukyanycheva, M.; Andersen, J.L.; Pedersen, V.K.; Olsen, J.; Corbett, L.B.; Bierman, P.R.; Knudsen, M.F.

Авторы: Nørgaard Jesper, Margold Martin, Jansen John D., Szuman Izabela, Lukyanycheva Mariya, Andersen Jane Lund, Pedersen Vivi Kathrine, Olsen Jesper, Corbett Lee B., Bierman Paul R., Knudsen Mads Faurschou
Журнал: Quaternary Research
Год издания: 2025
Издательство: Academic Press
Местоположение издательства: United States
Первая страница: 1
Последняя страница: 11
DOI: 10.1017/qua.2025.20
Аннотация: The glacial history of northeast Siberia is poorly understood compared with other high-latitude regions. Using 10Be and 26Al exposure dating together with remote sensing, we have investigated the glacial history of a remote, formerly glaciated valley in the Tas-Kystabyt Range of the Chersky Mountains in central northeast Siberia. Based on measurements from moraine boulders and bedrock samples, we find evidence for deglaciation of the valley 45.6 ± 3.4 ka ago, that is during the peak of Marine Isotope Stage 3. Satellite imagery of the range reveals at least two generations of moraines in other nearby valleys, indicating that multiple stages of glaciation took place across the Tas-Kystabyt Range. Based on calculated equilibrium-line altitudes, we speculate that the outer set of moraines is linked to the 45.6 ± 3.4 ka deglaciation event identified by our dating, while the inner generation of moraines is associated with a younger glaciation event, possibly the last glacial maximum (LGM). Thus, our results reaffirm current impressions that the maximum ice extent during the last glacial cycle was reached before the global LGM in northeast Siberia.
Добавил в систему: Лукьянычева Мария Сергеевна

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A late Pleistocene glacial maximum during MIS 3 in the Chersky Mountains, central northeast Siberiaстатья

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