Bratschen are weathering products that occur as a result of frost and aeolian corrasion almost exclusively on the calc-schists of the Upper Slate Mantle (Obere Schieferhülle) in the High Tauern mountains of Austria. The term is German.
The calc-schist, that appears blue-gray when freshly broken, weathers to a yellow to brown colour and flakes off on the surface to form Bratschen. These form steep (up to 40°), rocky, almost unvegetated mountainsides with an odd and rough-textured surface, caused by wind erosion. Bratschen are found on the mountains such as the Fuscherkarkopf, the Großer Bärenkopf, the Kitzsteinhorn, the Schwerteck or on the – eponymous – Bratschenköpfen.
- H. P. Cornelius, E. Clar (1935), Geologische Bundesanstalt — Wien III, ed., [pdf, geologie.ac.at "Erläuterungen zur geologischen Karte des Großglocknergebietes"] (in German), Geologische Karte der Republik Österreich: pp. 10, pdf, geologie.ac.at. Retrieved 5 May 2010