Internal Lower Penninic of Eastern Switzerland
Zurück zu UnterpenninikumDarstellung und Status
- Farbe RGB
- R: 239 G: 237 B: 235
- Rang
- tektonische Subdomäne
- Gebrauch
- Element ist nicht in Gebrauch
- Status
- lokaler Begriff (informell)
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- Internal Lower Penninic of Eastern Switzerland
- Historische Varianten
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Lower Penninic in Central and Eastern Switzerland (TK500 / Gouffon et al. 2024)
Paläogeografie und Tektonik
- Tektonische Einheit (bzw. Überbegriff)
- Herkunftstyp
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- tektonisch
- Metamorphose
- unmetamorph
Referenzen
- Neubearbeitung
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(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.
p.72: Mesozoic shaly-calcareous-sandy marine sedimentary units, called “Bündnerschiefer”, surround the Adula Nappe (Steinmann 1994) and other Lepontic units located at the front of this nappe (Piz Terri-Lunschania and Soja nappes). The Grava and Tomül nappes display traces of an early Alpine blueschist-facies metamorphism (Wiederkehr et al. 2008). The roots of all these units are located in the “Misox Zone”, which separates the Adula and Tambo nappes, and are interrupted southeast of Mesocco by the Forcola Normal Fault in its hangingwall. Meyre et al. (1998) see in contrast the Forcola Fault overlying the “Bündnerschiefer” units and these to be in the footwall of this fault that displaces them with respect to the ophiolitic Chiavenna Nappe in its hangingwall.