Formazione dei Vanis
Retour à Nappe d'AntigorioReprésentation et statut
- Couleur CMYK
- (57%,0%,7%,41%)
- Couleur RGB
- R: 65 G: 150 B: 140
- Rang
- Formation lithostratigraphique
- Usage
- Ce terme est en usage.
- Status
- terme informel
Nomenclature
- Deutsch
- Vanis-Formation
- Français
- Formation des Vanis
- Italiano
- Formazione dei Vanis
- English
- Vanis Formation
- Origine du nom
-
Graben unterhalb Piano dei Vanis (TI) E Campo
- Variantes historiques
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"Marbre rubané" (Matasci 2009), Vanis banded formation (Matasci et al. 2011 p.262)
Description
- Description
-
calcaires et calcschistes rubannés
- Géomorphologie
- Série souvent replissée du fait du contraste rhéologique entre les niveaux calcaires et argileux.
- Épaisseur
- 10-15 m (Matasci et al. 2011).
Hiérarchie et succession
- Unités sus-jacentes
- Unités sous-jacentes
Âge
- Âge au sommet
-
- Berriasien
- Âge à la base
-
- Berriasien
Géographie
- Extension géographique
- Lepontin: Val d'Antabia, Alpe Sevinèra, Pizzo Castello.
Références
- Définition
-
(2011) :
The Teggiolo zone: a key to the Helvetic–Penninic connection (stratigraphy and tectonics in the Val Bavona, Ticino, Central Alps). Swiss J. Geosci. 104, 257–283
p.262: 3.3.5 The Vanis banded formation
A very characteristic, 10–15 m thick, banded formation overlies the white marble with a sharp contact. It consists in an alternation of centimeter- to decimeter-thick beds of light-colored, often slightly orange, impure marble, with dark calcschists of variable thickness. The well marked layering of these two rocks with contrasted rheological properties is favorable to folding (Fig. 11). This banded marble/calcschist association occurs very continuously above the Sevinèra marble, as well in the Val Antabia as near Campo or farther E through the Alpe di Sevinèra up to the foot of the Pizzo Castello. As it is well exposed in the northern cliff of the Vanis ravine above Campo (e.g. 683.650/142.050) we name it the Vanis Formation.