Reuther, Anne U. and Herget, Juergen and Ivy-Ochs, Susan and Borodavko, Pavel and Kubik, Peter W. and Heine, Klaus (2006) Constraining the timing of the most recent cataclysmic flood event from ice-dammed lakes in the Russian Altai Mountains, Siberia, using cosmogenic in situ Be-10. GEOLOGY, 34 (11). pp. 913-916. ISSN 0091-7613,
Full text not available from this repository. (Request a copy)Abstract
Ice-dammed lakes were repeatedly formed in intermontane basins in the Russian Altai Mountains throughout the Pleistocene. These cataclysmic outburst floods, caused by ice-dam failures, were documented as Earth's largest flood waves by other geoscientists. Using in situ Be-10, we successfully dated surfaces of flood-associated boulders located in a former lake basin and downvalley from a former ice dam. Our precise surface exposure ages suggest that all boulders were associated with the most recent out of a number of cataclysmic floods that occurred at 15.8 +/- 1.8 ka. The field location of the boulders implies that they were deposited by the largest late Pleistocene flood that drained the Chuya-Katun Lake completely following initial dam failure. A published reconstruction of the late glacial palleoenvironment in the vicinity of the former ice dam indicates that dam failure was likely a result of climatically induced downwasting of glaciers. The failure of the ice dam provides more evidence for the timing of widespread warming during the late glacial in southern Russia. This flooding event in the headwaters of the Ob River coincides with a freshwater peak as recorded in isotopic records of the Kara Sea and the Arctic Ocean.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | LATE PLEISTOCENE; SOUTHERN SIBERIA; Altai Mountains; Be-10; outburst flood; paleolake |
| Subjects: | 900 History & geography > 910 Geography & travel |
| Divisions: | Philosophy, Art History, History, and Humanities > Institut für Geographie > Alumni or Retired Professors > Heine, Klaus, Dr. rer. nat. |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 19 Jan 2021 10:57 |
| Last Modified: | 19 Jan 2021 10:57 |
| URI: | https://pred.uni-regensburg.de/id/eprint/33801 |
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