Écaille d'Étirol–Lévaz
Back to Etirol-Levaz SliceRepresentation and status
- Color CMYK
- N/A
- Color RGB
- R: 241 G: 239 B: 237
- Rank
- tectonic slice
- Validity
- Unit is in Use
- Status
- informal term
Nomenclature
- Deutsch
- Étirol–Lévaz-Schuppe
- Français
- Écaille d'Étirol–Lévaz
- Italiano
- Scaglia di Étirol–Lévaz
- English
- Étirol–Lévaz Slice
- Origin of the Name
- Historical Variants
-
Etirol-Levaz-Schuppe = Ecaille d'Etirol-Levaz (Bl. Matterhorn), lembo Austroalpino settentrionale di Etirol-Levaz (Dal Piaz et al. 1992a), Etirol-Levaz Slice (TK500, Gouffon et al. 2024)
Description
- Description
-
Complexe de micaschistes éclogitiques de l'Austroalpin/Salassique septentrional.
Palaenography and tectonic
- Tectonic unit (resp. main category)
- Kind of protolith
-
- tectonic
- Metamorphic facies
-
- eclogite facies
References
- Definition
-
2024) :
Tectonic Map of Switzerland 1:500000, Explanatory notes. Federal Office of Topography swisstopo, Wabern
(
p.69: The Mont Emilius Nappe, the Etirol-Levaz Slice, the Châtillon-St-Vincent Slices (Dal Piaz 1999 and ref. therein) and the Theodulgletscher Slice (Bucher et al. 2020), located between the Zermatt - Saas Fee Nappe and the Tsaté Nappe, comprise eclogitic continental basement rocks. Due to the similarity of their pre-Alpine lithology with that of the Dent Blanche and Sesia nappes, their origin is probably the Adriatic continental margin. However, these units occupy a lower structural level than the Dent Blanche and Sesia nappes that belong tectonically to the Salassic domain. They exhibit a tectono-metamorphic history similar to that of the Zermatt - Saas Fee Nappe, including the Early Eocene age for their high-pressure metamorphism (Dal Piaz et al. 2001, Weber et al. 2015). These units likely derived from extensional allochthons, formed during the Jurassic opening of the Piemonte-Liguria Ocean in a more distal position than the Cervinia Terrane from which the Salassic nappes originate (see chap. 7).