Raab, Alexandra and Melles, Martin and Berger, Glenn W. and Hagedorn, Birgit and Hubberten, Hans-Wolfgang (2003) Non-glacial paleoenvironments and the extent of Weichselian ice sheets on Severnaya Zemlya, Russian High Arctic. QUATERNARY SCIENCE REVIEWS, 22 (21-22). pp. 2267-2283. ISSN 0277-3791
Full text not available from this repository.Abstract
The extent of the Barents-Kara Sea ice sheet (northern Europe and Russia) during the Last Glacial Maximum (LGM), in Marine Isotope Stage (MIS) 2 is controversial, especially along the southern and northeastern (Russian High Arctic) margins. We conducted a multi-disciplinary study of various organic and mineral fractions, obtaining chronologies with 14 C and luminescence dating methods on a 10.5 m long core from Changeable Lake (4 km from the Vavilov Ice Cap) on Severnaya Zemlya. The numeric ages indicate that the last glaciation at this site occurred during or prior to MIS 5d-4 (Early Middle Weichselian). Deglaciation was followed by a marine transgression which affected the Changeable Lake basin. After the regression the basin dried up. In late Middle Weichselian time (ca 25-40 ka), reworked marine sediments were deposited in a saline water body. During the Late Weichselian (MIS 2), the basin was not affected by glaciation, and lacustrine sediments were formed which reflect cold and and climate conditions. During the termination of the Pleistocene and into the Holocene, warmer and wetter climate conditions than before led to a higher sediment input. Thus, our chronology demonstrates that the northeastern margin of the LGM Barents-Kara Sea ice sheet did not reach the Changeable Lake basin. This result supports a modest model of the LGM ice sheet in northern Europe determined from numeric ice sheet modelling and geological investigations. (C) 2003 Elsevier Ltd. All rights reserved.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | KARA SEA REGION; TAYMYR PENINSULA; NORTHERN EURASIA; LATE PLEISTOCENE; MAXIMUM EXTENT; NOVAYA-ZEMLYA; SIBERIA; LAKE; QUATERNARY; POLLEN; |
| Subjects: | 900 History & geography > 900 Geography & history |
| Divisions: | Philosophy, Art History, History, and Humanities > Institut für Geographie |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 27 Jul 2021 13:02 |
| Last Modified: | 27 Jul 2021 13:02 |
| URI: | https://pred.uni-regensburg.de/id/eprint/38494 |
Actions (login required)
 |
View Item |
