Brèche du Collet des Rousses
Retour à nappe de Sion-CourmayeurReprésentation et statut
- Couleur CMYK
- (0%,0%,0%,100%)
- Rang
- Formation lithostratigraphique
- Usage
- Ce terme est en usage.
- Status
- terme local (informel)
Nomenclature
- Deutsch
- Collet-des-Rousses-Konglomerat
- Français
- Brèche du Collet des Rousses
- Variantes historiques
- Brèche du Collet des Rousses (Loubat 1968 et 1975, Antoine 1971, Fügenschuh et al. 1999, Loprieno 2001), Collet des Rousses conglomerate (Masson et al. 2008)
Hiérarchie et succession
- Unités sus-jacentes
Âge
- Âge au sommet
-
- Jurassique Moyen
- Note sur le sommet
- Dogger (Antoine 1971) or pre-Barremian (Loprieno 2001)
- Âge à la base
-
- Toarcien
- Note sur la base
- Late Liassic
- Méthode de datation
- Bélemnites
Paléogéographie et tectonique
- Paléogéographie
- bassin valaisan
- Termes génériques
Références
- Révision
-
2008) :
Early Carboniferous age of the Versoyen ophiolites and consequences: non-existence of a “Valais ocean” (Lower Penninic, western Alps). Bull. Soc. géol. Fr. 179/4, 337-355
p.341: The base of the calcschists is often characterized by one or several dm- to dam-thick layers of conglomerate, first described by Schoeller [1929] and called by Loubat [1968] and Antoine [1971] the “Collet des Rousses conglomerate”. They are formed by rounded or angular, poorly sorted, cm to dm-large pebbles, mainly limestones, in an abundant matrix that varies from a calcareous sandstone to a sandy limestone. They represent debris flows and gradually pass upwards to the normal PSB calcschists by decreasing abundance and granulometry of the detrital content. These basal layers also contain Liassic belemnites.
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