roches sédimentaires et volcaniques éovarisques du massif des Aiguilles Rouges
Back to Aiguilles RougesRepresentation and status
- Color CMYK
- (22%,0%,13%,37%)
- Color RGB
- R: 125 G: 160 B: 140
- Rank
- lithostratigraphic Group
- Validity
- Unit is in Use
- Status
- informal term
Nomenclature
- Deutsch
- Frühvariszische Sedimente und Vulkanite des Aiguilles-Rouges-Massivs
- Français
- roches sédimentaires et volcaniques éovarisques du massif des Aiguilles Rouges
- Historical Variants
-
Bellière & Streel 1980, (Dobmeier 1996, 1998), schistes et phyllades d'origine volcano-sédimentaire d'âge dinantien (Pairis et al. 1992)
Description
- Description
-
Série volcano-sédimentaire d'âge "Viséen supérieur", métamorphisée en faciès schiste vert.
Metamorphozed and variably deformed phyllites, graywackes and sandstones, which recrystallized in greenschist facies conditions. Interlayered with the metagraywackes are found meter-thick bands of green metavolcanites (e.g. at the train station of Les Houches) of basaltic to andesitic composition
Age
- Age at top
-
- Early Carboniferous (= Mississipian)
- Age at base
-
- Early Carboniferous (= Mississipian)
- Dating Method
-
Acritarches du Viséen tardif (Bellière & Streel 1980).
Geography
- Geographical extent
- Terminaison méridionale du massif des Aiguilles Rouges entre Servoz et les Houches, de part et d'autre du Granite des Montées Pélissiers.
Palaenography and tectonic
- Tectonic unit (resp. main category)
-
-
Aiguilles Rouges
:
massif des Aiguilles Rouges
-
Aiguilles Rouges
:
- Kind of protolith
-
- sedimentary
- volcanic
- Conditions of formation
-
Fe-basalts of E-MORB affinity (Dobmeier 1996), possibly recording Early Carboniferous transtension linked to the opening of the sedimentary basin and to the 330-340 Ma high-K magmatic pulse (Bussy et al. 2001).
- Metamorphism
- polycyclic
- Metamorphic facies
-
- greenschist facies (epizone)