Mélange de la Méchandeur
Back to Pierre AvoiRepresentation and status
- Color CMYK
- (0%,0%,20%,2%)
- Color RGB
- R: 250 G: 250 B: 200
- Rank
- lithostratigraphic Formation
- Validity
- Unit is in Use
- Status
- informal term
Nomenclature
- Deutsch
- Méchandeur-Melange
- Français
- Mélange de la Méchandeur
- Italiano
- Mélange della Méchandeur
- English
- Méchandeur Mélange
- Origin of the Name
-
Méchandeur (France) (voir aussi sur le géoportail de l'IGN)
- Historical Variants
-
schistes à blocs (Fudral 1998), grey schists (Antoine 1971, Loprieno 2001), formation de la Méchandeur = Méchandeur Formation = supra-Tarentaise wildflysch = Méchandeur flysch and wildflysch (Masson et al. 2008), Méchandeur Formation (Steck 2008)
Description
- Thickness
- 20-80 m, généralement autour de 50 m (Masson et al. 2008).
Geography
- Type area
- Vallée du Versoyen (France)
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.344: A flysch and a wildflysch are in principle two different things, but the interval between the Aroley limestone and the base of the Versoyen zone shows both types of rock associations more or less intimately linked, with lateral and vertical transitions from one to the other. This is why, at the present stage of research and for practical reasons, we group the flysch and the wildflysch into one single lithostratigraphic subdivision that we call the Méchandeur Formation. Its thickness is usually around 50 m, increasing sometimes up to 80 m and decreasing at other places to less than 20 m.