External Lower Penninic of Central Switzerland
Representation and status
- Color RGB
- R: 239 G: 237 B: 235
- Rank
- tectonic subdomain
- Validity
- Unit is not in Use
- Status
- local name (informal)
Nomenclature
- Deutsch
- Externes Unterpenninikum der Zentralschweiz
- Français
- Pennique Inférieur externe de Suisse centrale
- Italiano
- Pennidico Inferiore esterno della Svizzera centrale
- English
- External Lower Penninic of Central Switzerland
- Historical Variants
-
Lower Penninic of Central and Eastern Switzerland (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.71: The Lower Penninic subdomain of central and eastern Switzerland is represented by flysch nappes of controversial origin in the external part of the Alps and essentially by metasedimentary, mostly shaly-calcareous units (so called “Bündnerschiefer”) further south, deposited in the oceanic Valaisan Basin. Ophiolitic remnants are found at the base of some of the “Bündnerschiefer-type” nappes. The Chiavenna Nappe is a large ophiolitic slice found below the Middle Penninic Tambo Nappe and against the Gruf Complex, and thus considered as a remnant of the Valaisan oceanic crust. Lower Penninic sediment units form the Prättigau Half-Window and the core of the Lower Engadine Window.