Transfluence pass

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The transfluence pass (also called transfluence saddle , sometimes also diffluence pass ) is the place where glacier ice crosses from one valley system to a neighboring one and thus transfluence occurs. Transfluence passes are particularly common in ice flow networks . The direction of flow over the pass can change over the long term, for example if the climatic conditions change. The term is also used for formerly glaciated pass crossings.

Occasionally the term "diffluence passport" is used, sometimes a distinction is made between diffluence and transfluence . The latter expression is used when the crossing does not take place via the lateral slopes of the valley, but already at the point of origin and thus the glacier ice crosses a main watershed into another valley system.

geomorphology

Due to the transfluence, existing pass crossings are abraded from the ice and significantly lowered. Therefore, former transfluence passes are significantly lower than other passes on the same mountain ridge. The convenient function of many Alpine passes is due to the fact that these were glacial transfluence passes, for example the Brenner Pass or the Reschen Pass . Often, former transfluence passes also have a bas-relief with pass lakes caused by Detersion , such as the Malojapass .

Individual evidence

  1. ↑ a b Transfluenzpass at geodz.de
  2. ↑ Julia A. Jackson, James P. Mehl, Klaus KE Neuendorf: Glossary of geology. Springer Verlag, Berlin 2005, ISBN 0-922152-76-4 , p. 179. ( Google books )
  3. ↑ David Leslie Linton: The Forms of Glacial Erosion. In: Transactions and Papers (Institute of British Geographers). No. 33, 1963, pp. 1-28 ( abstract ).
  4. ↑ Rudolf Völk: Geomorphology of the Kleinwalsertal and its mountain framing, Landscapes from the Ice Age and Post Ice Age, taking into account the geological conditions. In: Vorarlberger Naturschau. Volume 10, pp. 7-95 ( online )
  5. ↑ Volkmar Singletary, Volkmar Mair : introduction to the geology of South Tyrol . Weise, Bozen 2005, p. 70 f .
  6. ↑ Surselva nature guide: Formation of mountain lakes. Retrieved December 15, 2014
  7. ↑ cf. about Herbert Louis, Klaus Fischer: General Geomorphology. Volume 2 picture part , 4th edition, Verlag Walter de Gruyter, 1979, ISBN 978-311007103-0 (series textbook of general geography , Erich Obst, ISSN  0458-9815 ), picture 124 The St. Gotthard pass from the Lucendro reservoir and Fig. 125 Transfluence pass and map terrace in the Radstätter Tauern, Eastern Alps , p. 127 f ( limited preview in the Google book search)