«Gneiss plagioclasici a biotite»
Retour à SudalpinReprésentation et statut
- Index
- GO
- Couleur CMYK
- (0%,0%,0%,100%)
- Rang
- Formation lithostratigraphique
- Usage
- Ce terme est en usage.
- Status
- statut inconnu
Nomenclature
- Deutsch
- «Schiefriger Biotitplagioklasgneis»
- Italiano
- «Gneiss plagioclasici a biotite»
- Origine du nom
-
Schiefriger Biotitplagioklasgneis (Reinhard 1964), Gneiss biotitico-plagiodasici (Boriani et al. 1990)
Description
- Description
-
Gneiss plagioclasici a biotite, da lenticolari a scistosi, spesso con muscovite et feldspato alcalino, localemente con orneblenda
Hiérarchie et succession
- Unité hiérarchiquement supérieure
Âge
- Âge au sommet
-
- Silurien
- Note sur le sommet
-
Permian?
- Âge à la base
-
- Ordovicien
Géographie
- Extension géographique
- Val Veddasca, Val Cannobina.
Références
- Révision
-
(1990) :
The evolution of the "Serie dei Laghi" (Strona-Ceneri and Scisti dei Laghi): the upper component of the Ivrea-Verbano crustal section; Southern Alps, North Italy and Ticino, Switzerland. Tectonophysics 182, 103-118
A muscovi te-rich paragneiss variety occurs in Val Veddasca ("Schieferiger Biotitplagioklasgneis ± Muskovi t fiihrend"; Reinhard. 1964) and in Val Cannobina (shown partly as "Gneiss biotitico-plagiodasici" and partly as "Gneiss minuti" on the Geological Map of the Verbania area by Boriani et al., 1977). It probably represents a more clay-rich facies of the Strona-Ceneri sediments, heteropic with the Ceneri gneiss. Ca-silicate nodules do not occur in this variety.