Brèche du Collet des Rousses
Back to Complesso della Punta RossaRepresentation and status
- Color CMYK
- (0%,0%,0%,100%)
- Rank
- lithostratigraphic Formation
- Validity
- Unit is in Use
- Status
- local name (informal)
Nomenclature
- Deutsch
- Collet-des-Rousses-Konglomerat
- Français
- Brèche du Collet des Rousses
- Historical Variants
- 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)
Hierarchy and sequence
- Units at roof
Age
- Age at top
-
- Middle Jurassic
- Note about top
- Dogger (Antoine 1971) or pre-Barremian (Loprieno 2001)
- Age at base
-
- Toarcian
- Note about base
- Late Liassic
- Dating Method
- Bélemnites
Palaenography and tectonic
- Paleogeography
- Valaisan Basin
- Tectonic unit (resp. main category)
References
- Definition
-
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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