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Deutsch: Lechtal-Decke
Français: Nappe du Lechtal
Italiano: Falda del Lechtal
English: Lechtal Nappe

The Lechtal Nappe is the upper tectonic unit of the Bajuvaric Nappe System (Upper Austroalpine) in the Northern Calcareous Alps. Its stratigraphic sequence is characterised by thick and widespread Jurassic and Cretaceous basin sediments, as well as local shallow sediments («Zürser Schwelle»).

In the northern Rätikon mountain range, between Austria, Liechtenstein and Switzerland, it is intersected by out-of-sequence thrust faults, which divided it into several slices (Schesaplana, Gorfion, Augstenberg, Ochsenkopf, Heubühl and Drei Schwestern slices) and also lead to the exposure of isolated lenses of the Arosa Zone. The «Northern Mittagspitz Zone», in the eastern Rätikon, and the Madrisa Slice, which is isolated north of Klosters between the Silvretta Nappe above and the Upper Penninic Arosa Zone below, are considered to be inverted slivers derived from the Lechtal Nappe.

Lechtal (Österreich), Vorarlberg

Lechtal-Decke (Ampferer & Hammer 1911, Allemann & Blaser 1951), oberes Bajuvarikum, nappe du Lechtal = unité du Lechtal (Hirsch 1966), Lechtal-Decke = Hochbajuvarikum (Gruber et al. 2010), Lechtal Nappe (TK500 / Gouffon et al. 2024)

"Lechtaler Hauptmulde" sensu Tollmann (1970a, 1976b), "Zürser Synklinorium" sensu May & Eisbacher (1999)

Deutsch: Languard-Decke
Français: Nappe du (Piz) Languard
Italiano: Falda del (Piz) Languard
English: Languard Nappe

The Languard Nappe covers is a basement-dominated Upper Austroalpine tectonic unit occupying a relatively small area. It is surrounded by the Engadine Fault in the northwest and lacks an equivalent on the northwestern side of this fault. It overthrusts the Bernina Nappe in the south, while in the north it overlies the Mezzaun Slice of the Bernina Nappe Complex and the Murtiröl Slice of the Err Nappe Complex; the thrust contacts being overprinted by normal faults (e. g., the Mezzaun Normal Fault) over large distances. To the east and northeast the Languard Nappe is overthrust by the basement of the Campo Nappe Complex and by the Ortler Nappe, which both occupy a higher tectonic position.

Piz Languard (GR)

Languarddecke (Schuppli 1921, Rösli 1928, Staub 1934, Spillmann 1993), Languard-Decke (Staub 1946), Falda di Languard (Pozzi 1959), Campo-Languard-Einheit (Dössegger 1987), Languard Nappe (TK500 / Gouffon et al. 2024)

Ovel da Languard

Deutsch: S-charl–Sesvenna-Decke
Français: Nappe de S-charl–Sesvenna
Italiano: Falda S-charl–Sesvenna
English: S-charl–Sesvenna Nappe

The S-charl-Sesvenna Nappe (including the Tavrü Slice) in the southeastern compartment of the Engadine Fault occupies the same tectonic position as the Silvretta Nappe in the northwestern compartment of this fault.

The basement of the S-charl-Sesvenna Nappe is commonly referred to as the Sesvenna basement and its cover as “S-charl-Unterbau” (a series of NE–SW trending series of synclines and anticlines that affect both basement and cover without major detachments within the sedimentary sequence) and “S-charl-Oberbau” (nowadays referred to as Tavrü Slice, consisting entirely of a Norian to Cretaceous succession, volumetrically dominated by an over 2 km thick Hauptdolomit and completely detached from the Carnian Raibl Group).

S-charl (GR)

Falda di Scarl (Pozzi 1957), Unterengadiner Dolomiten = S-charl-Decke (Cadisch et al. 1968), S-charl–Sesvenna-Teildecke (Stutz & Walter 1983), Sesvenna-S-charl nappe (Furrer et al. 1985), Scarl-Decke (Gruber et al. 2010), S-charl–Sesvenna Nappe (TK500 / Gouffon et al. 2024)

Deutsch: Arbostora-Antiklinale
Français: Anticlinal d'Arbostora
Italiano: Anticlinale di Arbostora
English: Arbostora Anticline

The Arbostora Anticline is a WSW–ENE trending fold occupying the southern part of the Varesotto Imbricates. It is separated to the north, by the Marzio Fault, from a complex syncline of imbricated Mesozoic sediments.

Arbostora Anticline (TK500 / Gouffon et al. 2024)

Deutsch: Roignais-Versoyen-Schuppe
Français: Écaille du Roignais-Versoyen
Italiano: Scaglia del Roignais-Versoyen
English: Roignais-Versoyen Slice

The Roignais-Versoyen Slice forms the median part of the Sion-Courmayeur Nappe from Savoy to the upper Valais. Its very characteristic lithology includes the Cretaceous «Valaisan Flysch» and a pre-flysch series with ophiolites.

Le Roignais (France)

digitation du Versoyen (Zulauf 1963), zone du Versoyen (Loubat 1968), Versoyen unit (Burri 1979), zone du Versoyen (Schürch et al. 1986, Schurch 1987), unité du Roignais-Versoyen (Jeanbourquin & Burri 1989, Antoine et al. 1992), Zona del Versoyen (Dal Piaz et al. 1992a), unité du Versoyen (Bousquet 1998), Versoyen zone (Steck 2008), Roignais-Versoyen Slice (TK500, Gouffon et al. 2024)

Deutsch: Innertkirchen–Lauterbrunnen-Zone
Français: zone d'Innertkirchen–Lauterbrunnen
Italiano: zona di Innertkirchen–Lauterbrunnen
English: Innertkirchen–Lauterbrunnen zone

Nördlichste, mehrphasig anatektische Zone des prävariszischen Kristallins des Aar-Massivs. Gegen Süden, von der Erstfeld-Zone durch eine präalpine Überschiebung getrennt.

Gastern-Innertkirchnergranit-Zone (Rutsch et al. 1966), Innertkirchen-Lauterbrunnen Crystalline Zone (von Raumer et al. 1993a), Innertkirchen-Lauterbrunnen Zone (Berger et al. 2017)

Deutsch: Balgau-Subformation
English: Balgau Subformation

Oberer Teil der Breisgau-Fm., mit ein erhöhten Hornblendeanteil im Schwermineralspektrum, sowie ein zunehmenden alpinen Anteil in der Geröll- und Schwermineralfraktion.

Obere Breisgau-Schichten = Balgau-Subformation (Ellwanger et al. 2011, LGRB 2011), Balgau-Subformation = Upper Breisgau Formation (Graf 2024)

Deutsch: Koralpe-Wölz-Deckenkomplex
Français: Complexe de nappe de la Koralpe-Wölz
Italiano: Complesso di falde della Koralpe-Wölz
English: Koralpe-Wölz Nappe Complex

The Koralpe-Wölz Nappe Complex is a high-pressure tectonic unit situated at the level of the Schlinig Thrust.

Koralpe-Wölz Nappe Complex (TK500 / Gouffon et al. 2024)

Deutsch: Ötztal-Bundschuh-Deckensystem
Français: Système de nappes de l'Ötztal-Bundschuh
Italiano: Sistemo di falde dell'Ötztal-Bundschuh
English: Ötztal-Bundschuh Nappe System

In Switzerland, the Ötztal-Bundschuh Nappe System of the Austrian nomenclature is represented only by the Ötztal Nappe Complex.

Ötztal-Bundschuh-Deckensystem (Gruber et al. 2010), Ötztal-Bundschuh Nappe Complex (TK500 / Gouffon et al. 2024)

Deutsch: Mindel-Eiszeit
Français: Période glaciaire du Mindel
Italiano: Periodo glaciale del Mindel
English: Mindel Glacial

Früher mit der morphostratigraphische Terrasse der Tiefere Deckenschotter in Verbindung gebracht. In Bayern werden die «Jüngeren Deckenschotter» der Mindel-Zeit zugeordnet.

die Mindel (Deutschland), Nebenfluss der Donau zwischen Ulm und Augsburg (Bayern)

Mindel (Penck & Brückner 1901-1909)