Metamorphism in the Eastern Alps

Metamorphism is geoscientifically defined as the change of rocks under conditions of high pressure and temperature, resulting in the formation of new mineral phases.

Section of the Geological Map Metamorphic structure of the Alps
Detail from: Oberhänsli, R. (Coord.): Metamorphic structure of the Alps (1:1,000,000)
© Geological Survey of Austria

Across the Alps, the metamorphic grade increases from the North towards the Central Zone and decreases again towards the South.

Metamophose Fazies im Druck-Temperatur (P/T) Diagramm.
Metamophose Fazies im Druck-Temperatur (P/T) Diagramm.
© Österreichischen Mineralogischen Gesellschaft, 2004

High-grade metamorphic rocksoccur in the central parts of the Alps (Hohe Tauern,Koralpe and Saualpe). Rocks of the Southern Alps have not been transformed by metamorphism.