«Gneiss plagioclasici a biotite»
Representation and status
- Index
- GO
- Color CMYK
- (0%,0%,0%,100%)
- Rank
- lithostratigraphic Formation
- Validity
- Unit is in Use
- Status
- unknown status
Nomenclature
- Deutsch
- «Schiefriger Biotitplagioklasgneis»
- Italiano
- «Gneiss plagioclasici a biotite»
- Origin of the Name
-
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
Hierarchy and sequence
- Superordinate unit
Age
- Age at top
-
- Silurian
- Note about top
-
Permian?
- Age at base
-
- Ordovician
Geography
- Geographical extent
- Val Veddasca, Val Cannobina.
References
- Definition
-
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.
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