«Gneiss plagioclasici a biotite»
Zurück zu Rocce magmatiche paleozoiche (metagraniti)Darstellung und Status
- Index
- GO
- Farbe CMYK
- (0%,0%,0%,100%)
- Rang
- lithostratigraphische Formation
- Gebrauch
- Element ist in Gebrauch
- Status
- unbekannter Status
Nomenklatur
- Deutsch
- «Schiefriger Biotitplagioklasgneis»
- Italiano
- «Gneiss plagioclasici a biotite»
- Herkunft des Namens
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Schiefriger Biotitplagioklasgneis (Reinhard 1964), Gneiss biotitico-plagiodasici (Boriani et al. 1990)
Beschreibung
- Beschreibung
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Gneiss plagioclasici a biotite, da lenticolari a scistosi, spesso con muscovite et feldspato alcalino, localemente con orneblenda
Hierarchie und Abfolge
- Übergeordnete Einheit
Alter
- Alter Top
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- Silur
- Bermerkungen zu Top
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Permian?
- Alter Basis
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- Ordovizium
Geografie
- Geographische Verbreitung
- Val Veddasca, Val Cannobina.
Referenzen
- Neubearbeitung
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(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.