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Zona di Mergoscia
- Origin of the Name
- Rank
- tectonic zone
- Status
- informal term
- Age
- Paleozoic - Mesozoic
- In short
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The Mergoscia Zone is a heterogeneous tectonic unit of the Western Lepontic (Toce Culimnation). It is composed of ortho- and paragneisses, metapelites, calcschists, metabasites and meta-ultrabasites. Both metabasites and meta-ultrabasites contain rare relics of high-pressure metamorphism (retrogressed eclogites and garnet-metaperidotites). This zone, displaying a high degree of deformation, is also interpreted as a mélange rather than as an originally stratified framework.
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Scisti del Gaggio
- Origin of the Name
- Rank
- lithostratigraphic Formation
- Status
- informal term
- In short
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Micascisti eterogenei, a due miche con quarzo e plagioclasio, spesso a patina bruno-rossiccia.
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Gneiss di Mergoscia
- Origin of the Name
- Rank
- lithostratigraphic Member (Subformation)
- Superordinate unit
- Status
- informal term
- In short
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Gneiss a biotite, feldspato alcalino ed oligoclasio, eterogeno a tessitura nodosa-venosa, a carattere migmatitico.