Bernina-Decke

Rappresentazione e statuto

Colore CMYK

N/A

Colore RGB

R: 241 G: 239 B: 237

Rango

falda

Uso

Unità in uso.

Status

valido

Nomenclatura

Deutsch

Bernina-Decke

Français

Nappe du (Piz) Bernina

Italiano

Falda del (Piz) Bernina

English

Bernina Nappe

Origine del nome

Piz Bernina (GR)

Varianti storiche

Berninadecke (Cornelius 1923), Falda di Bernina (Pozzi 1959), falda Bernina (Godenzi 1963), Bernina basement nappe (Manatschal & Nievergelt 1997), Bernina Nappe (TK500 / Gouffon et al. 2024)

Descrizione

Descrizione

Unterostalpine Kristallindecke.

Gerarchia e successione

Unità di rango inferiore

• Alv-Mulde
• Sassalbo-Zone

Paleogeografia e tettonica

Termini generici

• Bernina

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.86: The Bernina Nappe is a basement-dominated nappe that occupies a very large area southeast of the Engadine Fault. The basement is dominated by Late to Post-Variscan magmatic rocks, which intrude an older basement of presumably Precambrian age with Variscan overprint that is mainly preserved in the northern part of the nappe (Spillmann 1993, Büchi 1994, Spillmann & Trommsdorff 2007). Its Mesozoic cover is rather sparsely preserved, except for two important and famous occurrences, one around Piz Alv, north of the Bernina Pass, in the footwall of the Languard Nappe, and the other at the Sassalb, east of Poschiavo, in the footwall of the Campo Nappe (Mohn et al. 2012). The Bernina Nappe lacks a clear separation from the underlying Sella Nappe (Spillm ann 1993), which is attributed to the Salassic (see chap. 7). South of Poschiavo, the Bernina Nappe is folded around the E-plunging Pass d’Ur Antiform and can be followed westward along the Southern Steep Belt north of the Tonale Fault, until being cut off by the Bregaglia Intrusion.