Piemont-Ophiolitische-Decke
Representation and status
- Color CMYK
- (0%,0%,0%,100%)
- Rank
- nappe
- Validity
- Unit is in Use
- Status
- informal term
Nomenclature
- Deutsch
- Piemont-Ophiolitische-Decke
- Français
- nappe ophiolitique piémontaise
- Italiano
- unità ofiolitiche della Zona Piemontese
- English
- Piemonte ophiolite nappe
- Historical Variants
-
zone du Piémont (Argand 1909), zona delle pietre verdi (Gastaldi) = Serie a facies piemontese (Bearth), nappe des schistes lustrés (Termier ----, Hermann 1927), Ricorpimento delle Pietre Verdi = Ricoprimento del Piemonte (Hermann 1937), Piemonte ophiolite nappe (Ernst & Dal Piaz 1978), ofioliti Piemontesi = Unità ofiolitiche della Zona Piemontese (Dal Piaz et al. 1992a), Liguro-Piemont ophiolitic units (Babist et al. 2006)
Hierarchy and sequence
- Subordinate units
Palaenography and tectonic
- Paleogeography
- Piemont Basin
- Tectonic unit (resp. main category)
- Kind of protolith
-
- tectonic
-
Zone du Combin
- Name Origin
-
Massif du Grand Combin (VS)
- Rank
- tectonic zone
- Status
- informal term
- Nomenclatorial Remarks
- <p>La définition de la zone du Combin diffère sensiblement d'un auteur à l'autre.</p>
- In short
-
Ensemble des formations mésozoïques («schistes lustrés» et ophiolites) comprises entre les socles paléozoïques des nappes de Siviez-Mischabel et de la Dent Blanche et dépourvues d'éclogites (contrairement à la nappe de Zermatt-Saas).
- Age
- Permian
-
Nappe du Tsaté
- Name Origin
-
Alpage du Tsaté (VS)
- Rank
- nappe
- Status
- valid
- In short
-
The Tsaté Nappe is an Upper Penninic tectonic unit of the Western Alps cropping out in southern Valais and in the Valle d’Aosta. It comprises oceanic metasediments (mainly calcschists and black shales of Cretaceous age) and ophiolitic rocks of Jurassic age originating from the Piemonte-Liguria Ocean. This nappe is characterized by a chaotic aspect and metamorphism under conditions of blueschist facies followed by greenschist facies. It is interpreted as the result of the formation of an accretionary wedge at the foot of the active Adriatic margin and the subsequent subduction below this continental plate.
-
unité de la Luette
- Name Origin
-
La Luette (VS), Val d'Hérémence
- Rank
- tectonically bounded lithostratigraphic unit
- Status
- informal term
- Valid term
- Graue-Serie (Tsate) Garda-Bordon-Formation
- In short
-
Unité la plus interne de la nappe du Tsaté, constituée de calcschistes à dominance calcaire ou pélitique, riches en roches vertes.
-
unité du Pleureur
- Name Origin
- Rank
- tectonically bounded lithostratigraphic unit
- Status
- informal term
- Valid term
- Rousse_Serie (Tsate)
- In short
-
Marbres phyllitiques clairs, brèches sédimentaires à composants calcaires et dolomitiques, calcschistes quartzo-micacés à surface d'altération rougeâtre (nappe du Tsaté).
- Age
- Cretaceous
-
Frilihorn-Decke
- Name Origin
-
Sommet du Frilihorn (VS)
- Rank
- nappe
- Status
- valid
- Nomenclatorial Remarks
- <p>cf. faisceaux de Cogne (Elter 1972) et du Prariond (Ellenberger 1958, Deville 1987)</p>
- In short
-
The Frilihorn Nappe is a thin Upper Penninic tectonic unit intercalated within the Tsaté Nappe in the Val d’Anniviers, Zermatt Valley and Valtournanche. It is composed of a series of Briançonnais-type Permian–Triassic sediments overlain by Jurassic breccias and limestone and calcschists probably of Cretaceous age (hence quite similar to that of the Mont Fort Nappe).
- Age
- Middle Triassic
-
Nappe des Cimes Blanches
- Name Origin
- Rank
- nappe
- Status
- valid
- In short
-
The Cimes Blanches Nappe is a thin Upper Penninic tectonic unit intercalated within the Tsaté Nappe in the Val d’Anniviers, Zermatt Valley and Valtournanche. It is composed of a series of Briançonnais-type Permian–Triassic sediments overlain by Jurassic breccias and limestone and calcschists probably of Cretaceous age (hence quite similar to that of the Mont Fort Nappe).
- Age
- Permian
-
Zermatt–Saas-Fee-Decke
- Name Origin
- Rank
- tectonic unit
- Status
- valid
- In short
-
The Zermatt-Saas Fee Nappe is an Upper Penninic tectonic unit of the Western Alps consisting of rocks of Middle to Late Jurassic age derived from the Piemonte-Liguria Ocean. They are mostly large bodies of serpentinites, metagabbros and metabasalts in which pillow structures are locally well preserved. Oceanic sediments overlie these ophiolites, in particular metacherts (metaradiolarites). All of these rocks display relics of Early Eocene high-pressure metamorphism in eclogite facies.
- Age
- Middle Jurassic