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| Titel |
What happened between 14 and 10 ka in the central part of the European Eastern Alps? |
| VerfasserIn |
Mathias G. Bichler, Martin Reindl, Hermann Häusler, Susan Ivy-Ochs, Christian Wirsig, Jürgen M. Reitner |
| Konferenz |
EGU General Assembly 2013
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 15 (2013) |
| Datensatznummer |
250073427
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| Schlagwörter |
Landschaftsentwicklung, Gletschervorstoß, Gletscherrückzug, Glaziologie, Massenbewegung, Erdrutsch, Kosmogene Nuklide, Geochronologie, Quartär |
| Geograf. Schlagwort |
Österreich, Salzburg, Zell am See (Bezirk), Glocknergruppe, Hohe Tauern |
| Blattnummer |
154 [Rauris] |
| Blattnummer (UTM) |
3227 [Großglockner] |
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| Zusammenfassung |
| The area north of the Hoher Sonnblick peak in the Austrian province of Salzburg offers a
great opportunity to study landscape forming events (glacial advances, glacial retreats and
mass movements) since the Last Glacial Maximum.
The field work revealed temporal unique relationships of cross-cutting landscape
elements. These include multiple moraines and a till cover of a dominant glacial stadial
overlying a giant landslide (Â 0.4 km3, largest in the province of Salzburg). On the other
hand the basal till of this stadial itself is topped by a younger landslide of smaller
dimension.
We achieved absolute geochronological data by surface exposure dating with the
cosmogenic nuclide 10Be of 20 samples. Relative chronology based on field evidence and
absolute ages by 14C dating of the baselayers of peat, related to landslides and moraines, have
been used to control the plausibility of the exposure ages. Consequential we obtained well
constrained absolute ages of 2 landslides (13 ka and 10 ka BP) bracketing an Egesen
(Younger Dryas) (12.5 - 10 ka BP) glacier system. In combination with a detailed geological
and geomorphological map, it was possible to reconstruct the glacial chronology and the
landscape evolution of the study area between 21 ka BP and 1850 A.D with special focus on
the time between 14 ka and 10 ka BP.
With our multiple-dated Egesen (Younger Dryas) glacier system as a solid base, we
critically discuss the correlation of Lateglacial to Holocene stratigraphy, based on
high resolution climate archives in the North Atlantic region, with our study area
and other inner-alpine areas, which have been object of palaeoclimate research. |
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