Alpine red sandstone
The Alpine Buntsandstein is a lithostratigraphic formation of the lower Triassic , the Scythian . In contrast to the Werfen formation, which was mainly formed in the sea, the alpine red sandstone is largely a fluvial sediment caused by rivers .
history
The terms red sandstone of the Alps and Alpine sandstone go back to Carl Wilhelm von Gümbel , who used them for the first time in the years 1858 to 1861. With the terms a distinction to the lithologically deviating Germanic red sandstone should be expressed.
Definition and distribution area
The Alpine red sandstone is found in the western part of the Northern Limestone Alps , especially in their southern area. To the east it can be found in the Northern Limestone Alps as far as the Salzburg area. Alpine red sandstone can also be found in the Eastern Alpine ceilings of the southern Limestone Alps such as in the Drauzug and occasionally in the Central Carinthian region. In the Northern Limestone Alps, it is interlocked with the Werfen formation, which increasingly replaces the red sandstone from the hanging wall to the horizontal wall towards the east. In addition to the Werfen formation, the red sandstone is also overlaid by the Reichenhall formation . The red sandstone is underlain by Alpine Verrucano , the Präbichl Formation and the Val Gardena Formation . The Alpine red sandstone can be a few hundred meters thick.
Lithologically, red sandstone is mostly red, but also purple, gray, brown or greenish quartz sandstone, the feldspar content of which is usually only low. Clay and marl layers occur at the bank boundaries . The material was mainly poured from the north and north-west and must have traveled a long way.
Subformations
In some publications, the lower and upper red sandstone is separated. The fluvial sediments of the Lower Buntsandstein increasingly merge into the sediments of a flat coastal area, before the fluvial sediments of the Upper Buntsandstein set in after a sea retreat.
Individual evidence
- ↑ Alexander Tollmann: Analysis of the classical North Alpine Mesozoic. Stratigraphy, fauna and facies of the Northern Limestone Alps . Part II of the monograph of the Northern Limestone Alps, Verlag Deuticke, Vienna 1976, ISBN 3-7005-4412-X , p. 54.
- ↑ K. Krainer: On the sedimentology of the alpine red sandstone and the Werfener layers (Skyth) Carinthia , Geol. Paläont. Mitt. Innsbruck, Vol. 14, March 1985 PDF file , accessed on July 19, 2009.
- ↑ Alexander Tollmann: Analysis of the classical North Alpine Mesozoic. Stratigraphy, fauna and facies of the Northern Limestone Alps . Part II of the monograph of the Northern Limestone Alps, Verlag Deuticke, Vienna 1976, ISBN 3-7005-4412-X , p. 55.
- ^ V. Stingl: Alpine Buntsandstein and Werfen layers near Leogang (Salzburg), Geol. Paläont. Mitt. Innsbruck, Vol. 14, September 1984. PDF file , accessed on July 19, 2009.