Alp-Cavradi-Gneiskomplex
Back to Gotthard nappeRepresentation and status
- Index
- P-C
- Color CMYK
- (12%,0%,15%,35%)
- Color RGB
- R: 145 G: 165 B: 140
- Rank
- lithostratigraphic Formation
- Validity
- Unit is in Use
- Status
- informal term
Nomenclature
- Deutsch
- Alp-Cavradi-Gneiskomplex
- Français
- Complexe gneissique de l'Alp Cavradi
- Italiano
- Complesso gneissico dell'Alp Cavradi
- English
- Alp Cavradi Gneiss Complex
- Origin of the Name
-
Alp Cavradi (GR), Tujetsch
- Historical Variants
-
Paragneis am Nordrand des Gotthard-Massivs (Niggli 1944), Paragneis mit lokalen Schiefer- und Phylliteinschaltungen am Nordrand der Gotthard-Decke (Vögeli et al. 2013), Alp Cavradi Gneiss Complex (Berger et al. 2017)
Age
- Age at top
-
- Paleozoic
- Age at base
-
- Paleozoic
Geography
- Geographical extent
- Nordrand des Gotthardgebirgmassivs.
Palaenography and tectonic
- Tectonic unit (resp. main category)
- Kind of protolith
-
- sedimentary
- Metamorphism
- polycyclic (Alpine and Variscan)
- Metamorphic facies
-
- greenschist facies (epizone)
- amphibolite facies
References
- Definition
-
(2017) :
Geological Map of the Aar Massif, Tavetsch and Gotthard Nappes. Geological Special Map 1:100'000, Explanatory Notes 129
p.71: The Alp Cavradi Gneiss Complex corresponds to the “Paragneis am Nordrand des Gotthard-Massivs” of NIGGLI (1944) with sericite-biotite gneiss as the dominant lithology. Layers of phyllite, quartzite and graphitic schist are intercalated with the gneiss. NIGGLI (1944) indicated an age between the emplacement of the Ordovician “Streifengneis” and the Permian Medel Granite/Cristallina Granodiorite for the protoliths of these metasedimentary rocks. In contrast, AMBÜHL (1929) interpreted the sericite-biotite gneiss as a surface alteration of the metasedimentary rocks at the contact with Carboniferous–Permian sedimentary rocks.