Glaciation in the surroundings of Prášilské Lake (Bohemian Forest, Czech Republic)

Comprehensive geomorphological and sedimentological analyses confirmed three phases of Würm glaciation in the surroundings of Prášilské Lake and Stará Jímka, in the Bohemian Forest (Šumava Mountains). Glaciations were affected by a steep east-facing slope, by plateaus on the adjacent ridges and by l...

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Bibliographic Details
Published in:Geomorphology (Amsterdam, Netherlands) Netherlands), 2010-04, Vol.117 (1-2), p.181-194
Main Authors: Mentlík, Pavel, Minár, Jozef, Břízová, Eva, Lisá, Lenka, Tábořík, Petr, Stacke, Václav
Format: Article
Language:English
Subjects:
Bohemian Forest
Chronology
Deglaciation
Earth sciences
Earth, ocean, space
Exact sciences and technology
Forests
Freshwater
Geochronology
Geomorphology
Geomorphology, landform evolution
Glaciers
Isotope geochemistry. Geochronology
Lakes
Marine and continental quaternary
Mountains
Movements
Pleistocene glaciations
Prášilské Lake
Sedimentology
Surficial geology
Valleys
Šumava
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Summary:Comprehensive geomorphological and sedimentological analyses confirmed three phases of Würm glaciation in the surroundings of Prášilské Lake and Stará Jímka, in the Bohemian Forest (Šumava Mountains). Glaciations were affected by a steep east-facing slope, by plateaus on the adjacent ridges and by local geological conditions. A small valley glacier (about 2km long and 50m thick) occurred during the first phase. In the second phase, a glacier–rock glacier developed, probably based on remnants of the valley glacier. During the last phase glacial activity was divided into Stará Jímka and the stepped cirque of Prášilské Lake. A further shallow (∼3m deep) lake in Stará Jímka was dammed by slope movements after deglaciation (∼14cal.kaBP) and survived until ∼4cal.kaBP. The Late Pleistocene chronology of the Bohemian Forest seems to be related more closely to the Alps than to northern Europe. In the mid-mountains of central Europe, Pleistocene glaciation decreases significantly eastward, because of increasing continentality. The presence of plateaus (deflation areas), around 1300m altitude, across the approach of westerly winds was important for the development of glaciers in the Bohemian Forest. The termination of glaciation before the Younger Dryas is specific to the Bohemian Forest in comparison with the Vosges and Krkonoše Mountains.
ISSN:0169-555X
1872-695X
DOI:10.1016/j.geomorph.2009.12.001