Formazione del Narèt
Back to Sambuco nappeRepresentation and status
- Color CMYK
- (6%,33%,0%,29%)
- Color RGB
- R: 170 G: 120 B: 180
- Rank
- lithostratigraphic Formation
- Validity
- Unit is in Use
- Status
- informal term
Nomenclature
- Deutsch
- Narèt-Formatio
- Français
- Formation du Narèt
- Italiano
- Formazione del Narèt
- English
- Narèt Formation
- Origin of the Name
- Historical Variants
- Bündnerschiefer, Naret Formation (Masson & Steck 2015)
Hierarchy and sequence
- Units at roof
- Units at floor
- Upper boundary
- Massari-Fm.
- Lower boundary
- Trias
Age
- Age at top
-
- Hettangian
- Age at base
-
- Rhaetian
Geography
- Geographical extent
- Lepontin
References
- Definition
-
(2015) :
The Maggia-Sambuco nappe : stratigraphy, correlations and tectonic consequences (Central Alps). Swiss Geoscience Meeting, Abstract Volume 13 (Basel), 16–17
p.17: Above [the quartzite and dolomite of the Triassic] comes a thick formation of dark-coloured quartzitic micaschists, rich in garnet, with a few thin intercalations of orange limestone. It forms most of what has been mapped until now in this zone as “Bündnerschiefer”. We name it the Naret Formation. It shows remarkable similarities with the “untere und mittlere Granatschiefer” (Liszkay 1965) or with the “basale Stgir-Serie” (Baumer et al. 1961, Frey 1967) of the Gotthard sedimentary cover. We propose a latest Triassic (Rhaetian) to earliest Liassic age.