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Late Quaternary glacial and climate history of the Pamir Mountains derived from cosmogenic Be exposure ages |
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| Authors: | Roland Zech Uwe Abramowski Pjotr Sosin Wolfgang Zech |
| Institution: | a Institute of Soil Science and Soil Geography, University of Bayreuth, D-95440 Bayreuth, Germany b Institute of Soil Science, Tajik Academy of Agriculture, Dushanbe, Tajikistan c Paul Scherrer Institute c/o Institute of Particle Physics, ETH Zurich, CH-8093 Zurich, Switzerland |
| Abstract: | Moraines southwest of Lake Yashilkul, Pamir, Tajikistan, were dated using 10Be exposure ages of boulder surfaces. We found evidence for (1) an extensive glaciation ∼60,000 yr ago; (2) a less extensive glacial advance, which deposited a characteristic hummocky moraine lobe with exposure ages ranging from ∼11,000 to 47,000 yr, probably deposited at or before 47,000 yr ago; and (3) lateral moraines with exposure ages of ∼40,000 yr, 27,000 yr and 19,000 yr, respectively. Increasing aridity in the Pamir is most likely responsible for the progressively limited extent of the glaciers during the Late Pleistocene. |
| Keywords: | Cosmogenic nuclides 10Be Exposure dating Glacial chronology Pamir |
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