Timing of retreat of the Reuss Glacier (Switzerland) at the end of the Last Glacial Maximum

Reber, Regina; Akçar, Naki; Ivy-Ochs, Susan; Tikhomirov, Dmitry; Burkhalter, Reto; Zahno, Conradin; Lüthold, Aron; Kubik, Peter W.; Vockenhuber, Christof; Schlüchter, Christian (2014). Timing of retreat of the Reuss Glacier (Switzerland) at the end of the Last Glacial Maximum. Swiss journal of geosciences, 107(2-3), pp. 293-307. Birkhäuser 10.1007/s00015-014-0169-5

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We used cosmogenic 10Be and 36Cl to establish the timing of the onset of deglaciation after the Last Glacial Maximum of the Reuss Glacier, one of the piedmont lobes of the Alpine ice cap that reached the northern Alpine foreland in Switzerland. In this study, we sampled erratic boulders both at the frontal position in the foreland (Lenzburg and Wohlen, canton Aargau) and at the lateral Alpine border position (Seeboden moraine, Rigi, canton Schwyz). The minimum age for the beginning of retreat is 22.2 ± 1.0 ka at the frontal (terminal) position and 20.4 ± 1.0 ka at the lateral position. These ages are directly comparable with exposure ages from the other piedmont lobes in the northern Alpine foreland. Our data from the mountain called Rigi, do not support the hypothesis that boulders located external to the Seeboden moraine were deposited prior to the last glacial cycle. We present a first exposure age from an erratic boulder in a retreat position in the Alpine foreland. The Reuss Glacier was approximately 12 km behind the maximal extent no later than at 18.6 ± 0.9 ka.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Institute of Geological Sciences
08 Faculty of Science > Institute of Geological Sciences > Quaternary Geology

UniBE Contributor:

Reber, Regina; Akçar, Naki and Tikhomirov, Dmitry

Subjects:

500 Science > 550 Earth sciences & geology

ISSN:

1661-8726

Publisher:

Birkhäuser

Language:

English

Submitter:

Regina Reber

Date Deposited:

29 Jul 2015 10:36

Last Modified:

07 Oct 2015 09:59

Publisher DOI:

10.1007/s00015-014-0169-5

Uncontrolled Keywords:

Pleistocene; Northern Alpine foreland; Deglaciation; Erratic boulders; Surface exposure dating (10Be, 36Cl)

BORIS DOI:

10.7892/boris.70565

URI:

https://boris.unibe.ch/id/eprint/70565

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