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Zone de cisaillement de Roisan–Cignana
- Origin of the Name
-
Roisan (Italia), N Aoste
- Rank
- tectonic zone
- Status
- informal term
- Age
- Permian - Middle Triassic
- In short
-
The Roisan-Cignana Shear Zone consists of slices of Mesozoic sediments and crystalline basement in a mylonitic matrix derived from the adjacent Dent Blanche Nappe (Arolla Unit) and of the Mont Mary Nappe (Lower and Upper units). The high-pressure mineral assemblages along the contact between these tectonic slices indicates that their emplacement occurred in an early deformation stage, before or during the subduction.
- Nomenclatorial Remarks
-
commune du Val d'Aoste
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Méta-chert de la Becca di Salé
- Origin of the Name
- Rank
- lithostratigraphic unit
- Status
- local name (informal)
- In short
-
Microquartzites rubanés à niveaux manganésifères, ferrugineux et phosphatés, présents localement dans la zone de Roisan.
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Marbres de Roisan
- Origin of the Name
-
Roisan (Italia), N Aoste
- Rank
- lithostratigraphic Formation
- Status
- informal term
- Age
- Late Triassic
- In short
-
Marbres, marbres dolomitiques, dolomies fines et sombres, dolomies blanchâtres plus grossières et litées, fins niveaux de quartzites, brèches.
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