Mezzaun-Störung
Representation and status
- Rank
- fault zone
- Validity
- Unit is not in Use
- Status
- local name (informal)
Nomenclature
- Deutsch
- Mezzaun-Störung
- Français
- Détachement de Mezzaun
- English
- Mezzaun Detachment Fault
- Historical Variants
-
Mezzaun Detachment Fault (TK500 / Gouffon et al. 2024)
Palaenography and tectonic
- Tectonic unit (resp. main category)
- Kind of protolith
-
- tectonic
- Metamorphism
- non metamorphic
References
- Definition
-
(2024) :
Tectonic Map of Switzerland 1:500000, Explanatory notes. Federal Office of Topography swisstopo, Wabern
p.85: The Murtiröl Slice, consisting of basement and cover, forms a dome-like feature in the footwall of an important extensional detachment. This detachment fault and the adjacent Engadine Fault separate the Murtiröl Slice from all the surrounding units belonging to either the Bernina Nappe Complex (in the northwest and southwest) or to the Upper Austroalpine Languard and Ortler nappes (in the east and northeast). This detachment fault is referred to as the Mezzaun Detachment Fault in the southwestern rim of the dome (see Furrer et al. 2015, Fig. 12) but can be followed further to the north, swinging around into a NW– SE strike in the lower Val Trupchun, where the extensional offset becomes more substantial. This is one of the most spectacular normal faults attributed to the Late Cretaceous phase of extension that postdates Cretaceous shortening but predates Cenozoic collision (Froitzheim et al. 1994).