Absence of Large-Scale Ice Masses in Central Northeast Siberia During the Late Pleistocene
| العنوان: | Absence of Large-Scale Ice Masses in Central Northeast Siberia During the Late Pleistocene |
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| المؤلفون: | Nørgaard, Jesper, Margold, Martin, Jansen, John D., Kurbanov, Redzhep, Szuman, Izabela, Lund Andersen, Jane, 1986, Olsen, Jesper, Knudsen, Mads Faurschou |
| المصدر: | Geophysical Research Letters. 50(10) |
| مصطلحات موضوعية: | mountain glaciers, glacial moraines, boulder erratics, exposure dating, cosmogenic nuclides, ice sheet |
| الوصف: | Ongoing speculation regarding the existence of large Late Pleistocene ice masses in Northeast Eurasia reflects the dearth of age constraints on glaciations across this vast region. Here, we report the first dates from the central part of Northeast Siberia, consisting of 22 cosmogenic 10Be exposure ages from boulders deriving from a sequence of three moraines in the Chersky Range. The dated moraine sequence indicates progressive contraction of maximum glacier extent from Marine Isotope Stage 6 to the Last Glacial Maximum, while the remotely-sensed mapping indicates an older, more expansive glaciation in the region yet undated. Our results show that Late Pleistocene glaciations were limited to the highlands, and Northeast Siberia did not host a large, coalescent ice sheet during the Last Glacial Maximum or Marine Isotope Stage 6. |
| وصف الملف: | |
| URL الوصول: | https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-220460 https://doi.org/10.1029/2023GL103594 |
| قاعدة البيانات: | SwePub |
| تدمد: | 00948276 19448007 |
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| DOI: | 10.1029/2023GL103594 |