Complexe de nappes du Wildhorn

Rappresentazione e statuto

Colore CMYK

N/A

Colore RGB

R: 241 G: 239 B: 237

Rango

complesso di falde

Uso

Unità in uso.

Status

valido

Discussione del statuto

Nomenclatura

Deutsch

Wildhorn-Deckenkomplex

Français

Complexe de nappes du Wildhorn

Italiano

Complesso di falde del Wildhorn

English

Wildhorn Nappe Complex

Origine del nome

Wildhorn (VS)/(BE)

Varianti storiche

Wildhorndecke, nappe du Wildhorn, Wildhorn Nappe Complex (Gouffon et al. 2024)

Descrizione

Descrizione

Die Wildhorn-Decke schliesslich, die umfangreichste der drei Decken, zeigt einen ausgeprägten Stockwerkbau. Sie weist einzig auf der Ostseite des Kientals und am Bundstock einen Kern von Lias auf. Sonst sind die mächtigen «Aalénien- Schiefer» (=Molser Serie) das älteste Schichtglied. Ein komplizierter Malm/Dogger-Faltenbau ist durch die beweglichen Mergel des Berriasien vom Kreide- Stockwerk mit dem transgressiven Tertiär getrennt. (Herb et al. 1978 S.236)

Gerarchia e successione

Unità di rango inferiore

• Nappe du Sublage
• Nappe du Mont Gond
• Nappe des Diablerets

Unità sovrastante

• Mélange de la Plaine Morte

Unità sottostante

• Gellihorn Nappe
• Jägerchrüz Nappe

Limite superiore

chevauchement basal ultrahelvétique

Età

Geomorfologia

• Cretacico

Età alla base

• Triassico

Paleogeografia e tettonica

Paleogeografia

Distal NHS (S-Helv.)

Tipo di origine

• tettonico

Referenze

Revisione

Gouffon Yves (Editor) (2024) : Tectonic Map of Switzerland 1:500000, Explanatory notes. Federal Office of Topography swisstopo, Wabern

p.40: The Wildhorn Nappe Complex comprises a complete stratigraphic series ranging from Triassic to Paleogene. It occupies the Rawil axial depression: southwest of Rawilpass, the axes of the main folds dip to the NE, while northeast of the pass they dip to the SW. The nappe complex continues to the northeast up to the Kander Valley, where it is replaced by the Axen and Drusberg nappes. The Axen Nappe contains Jurassic strata, whereas the Drusberg Nappe is made up of Cretaceous–Paleogene strata. Hänni & Pfiffner (2001) set the northeastern limit of the Wildhorn Nappe Complex at the Mesozoic synsedimentary Bachli-Giesenen Fault, which was reactivated by Alpine nappe stacking. This fault induced an abrupt lateral increase in the thickness of the Cretaceous sediments toward the east which in turn caused an important change in structural style (Hänni & Pfiffner 2001).
The Wildhorn Nappe Complex consists of three superposed nappes: the Diablerets Nappe, present only in the southwest, at the base of the complex, is linked by a tight syncline to the Mont Gond Nappe, which is also outcropping mainly in the southwestern part of the complex. The highest Sublage Nappe forms the main body of the complex; it overlies the thin Jägerchrüz Nappe north of Sierre and the Gellihorn Nappe further northeast (see § 4.1.3).