Marbach–Berneck-Dreieckzone

Rappresentazione e statuto

Colore CMYK

N/A

Colore RGB

R: 236 G: 234 B: 232

Rango

unità tettonica

Uso

Unità in uso.

Status

valido

Nomenclatura

Deutsch

Marbach–Berneck-Dreieckzone

Français

Zone triangulaire de Marbach–Berneck

Italiano

Zona triangolare di Marbach–Berneck

English

Marbach–Berneck Triangle Zone

Varianti storiche

Antiklinalzone der subalpinen Molasse (Habicht 1987), Triangelzone = «Hauptantiklinale» der Zentralschweizer subalpinen Molasse (Jordi 2012), Zone triangulaire, Zona triangolare, Triangle zone, Steffisburg-Berneck-Dreieckzone, Marbach-Berneck Triangle Zone (TK500 / Gouffon et al. 2024)

Descrizione

Descrizione

Äusserste Zone der Subalpine Molasse zwischen Hauptüberschiebung und Rücküberschiebung, mit Schichten die beides nach SE und NW fallen (sog. «Antiklinalzone» bzw. «Triangelzone»).

Gerarchia e successione

Unità di rango inferiore

• Marbach-Schichten
• Etzel-Klippe
• Hüllerich-Klippe

Paleogeografia e tettonica

• Molassa d'acqua dolce inferiore

Termini generici

• Subalpine Molasse

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.29: In the Entlebuch area, situated west-southwest of Luzern, and between the Zürichsee and Lustenau in the Alpine Rhine Valley, Early Miocene Molasse units are wedged in between a S-vergent backthrust that delineates the southern boundary of the Foreland Plateau Molasse and a N-vergent thrust, which marks the northern boundary of the Subalpine Molasse. In cross-section, this area forms a triangle (see Pl. II, eastern and central cross-section).

(...) Mapping has shown that a triangle zone developed where the proximal Plateau Molasse consists of an alternation of sandstones and mudstones. In cases where thick conglomerate packages occur at the southern border of the Plateau Molasse, which is, for example, the case east of Thun, then the triangle zone is replaced by a sequence of SE-dipping thrust sheets (e. g., Mock et al. 2020).