Structure and evolution of a rocksalt-mudrock-tectonite: The haselgebirge in the Northern Calcareous Alps

► Rocksalt and mudrock form a two-component tectonite: The rock type “haselgebirge”. ► All rock types studied are fault rocks. ► By use of a temperature-independent subgrain size piezometer, the paleo-differential stress of halite was calculated at ca. 2.5 MPa in Altaussee, Auistria and ca. 4.5 MPa in Berchtesgaden, Germany. ► Including data from a grain-size piezometer, temperatures were estimated at ca. 150 ± 20 °C and 110 ± 10 °C.