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Deutsch: Piz-Terri-Lunschania-Decke
Français: Nappe du Piz-Terri-Lunschania
Italiano: Falda del Piz-Terri-Lunschania
English: Piz-Terri-Lunschania Nappe

The Piz Terri-Lunschania Nappe (Eastern Lepontic) consists of several slices made up of Permian and Mesozoic sediments. This nappe forms the large isoclinal Lunschania Antiform situated in front of the Adula Nappe and surrounded by the Grava Nappe.

Piz Terri (GR) und Lunschania (GR)

Zone der schwarzen Terrischiefer und der Gneisquarzite = Zone Piz Terri - Lunschania (Nabholz 1945), Soja-Decke = Zone Piz Terri-Lunschania (Kupferschmid 1977), Zone Piz Terri-Lunschania (Bolli et al. 1980), Piz Terri-Lunschania zone (Frey et al. 1982), Luzzone-Terri nappe (Galster et al. 2010), Piz Terri–Lunschania Zone (Berger et al. 2017)

Deutsch: Laas-Decke
Français: Nappe de Laas
Italiano: Falda di Laas
English: Laas Nappe

The Laas Nappe exposes a series of often subvertically northward inclined garnet and staurolite bearing paragneisses, marbles and amphibolites metamorphosed under amphibolite-facies conditions during the Variscan orogeny. Cretaceous metamorphic overprint varies from greenschist facies in the west to lower amphibolite facies in the east. This nappe occupies a much-debated and still unclear position in the Upper Austroalpine nappe pile.

Laas = Lasa (Italia), Val Venosta

Laaser Einheit (Mair et al. 2007), Laas Nappe (TK500 / Gouffon et al. 2024)

Deutsch: Furtwangsattel-Zone
Français: zone du Furtwangsattel
Italiano: zona del Furtwangsattel
English: Furtwangsattel zone

Triaskeil (Quarzit, Rauwacke) zwischen Erstfeld-Zone und Ferden-Guttannen-Zone.

Furtwangsattel (BE)

Triasqarzit des Furtwangsattels (Bl. Innertkirchen), Furtwangsattel Zone

Deutsch: Tonschiefer der Nisellas-Gruppe
Français: Schistes argileux du Groupe de Nisellas
Italiano: Scisti argilosi del Gruppo di Nisellas
English: Shales of the Nisellas Group

Grundmasse der Nisellas-Gruppe, bestehend aus dunkelgrauem bis schwarzem Tonschiefer.

Dunkelgrauer bis schwarzer Tonschiefer (Wyss & Wiederkehr 2017)

Deutsch: Hochstegen-Kalk
Français: Calcaire de Hochstegen
Italiano: Calcare di Hochstegen
English: Hochstegen Limestone

Kalkige Einschaltung im «Unteren Schieferhülle» des «Zentralgneises» der Zillertaler Alpen.

Weiler Hochstegen = Hochsteg (Österreich), 2 km SW Mayrhofen

Trias in Hochstegen-Facies (Staub 1946), Hochstegen-Kalk (Oberhauser 1980), Tuxer Marmor

Deutsch: Areua-Bruschghorn-Melange
Français: Mélange d'Areua-Bruschghorn
Italiano: Mélange di Areua-Bruschghorn
English: Areua-Bruschghorn Mélange

The Areua-Bruschghorn Mélange is a tectonic mélange situated in the lower limb of the Niemet-Beverin Backfold, at the contact between the Schams Nappe Complex and the Tomül Nappe.

Bruschghorn (GR)

Areuezone + Burgruinengneis (Gansser 1937), Burgruinen-Zone + Bruschghorn-Zone (Nabholz 1945), Areue-Vignone-Zone = frontale Tambo-Decke (Streiff 1962), lame d'Areua (Mayerat Demarne 1994), Areua-Bruschghorn-Mélange (Steinmann 1994), Areua-Bruschghorn-Zone (Mélange) (Wyss & Isler 2007), Areua-Bruschghorn-Melange (Wyss & Wiederkehr 2017)

Das im Westschams vorkommende Areua-Bruschghorn-Melange lässt sich über das Scharnier der liegenden Niemet-Beverin-Falte mit dem Martegnas-Melange im Ostschams verbinden.

Terziario

Deutsch: Hegau-Vulkanite
Français: Vulcanites de l'Hegau
Italiano: Vulcaniti dell'Hegau
English: Hegau Volcanic Suite

The Miocene Hegau Volcanic Suite, situated in the Autochthonous North Alpine Foreland of Germany (area of Singen northwest of the Bodensee), is related to intraplate magmatism of alkaline basaltic composition. The Hegau volcanism seems to be associated with extension within the NW–SE striking Hegau-Bodensee Graben structure and regional uplift of the Schwarzwald area. Volcanic activity is of Middle to Late Miocene age, with various episodes succeeding each other between some 14 and 7 Ma: pyroclastics (“Deckentuffe”), including extensive layers of volcanic ash (up to 100 m thick) as well as chimney and crater fills, came first, followed by olivine nephelinites, hornblende tuffs and finally phonolites.
The Upper Freshwater Molasse of northeastern Switzerland contains several levels of bentonite (fossil weathering products of volcanic ash deposits) radiometrically dated between 15.3 and 14.2 Ma (Gubler 2020 and ref. therein), the ages of which coincide with the onset of Hegau volcanism. A younger bentonite layer near Frauenfeld was dated by Rahn & Selbekk (2007) at around 11.5 Ma.

Hegau (Deutschland), NW Bodensee

Flötztrapp-Kuppen (Ebel 1808), Obermiocäne vulkanische Bildungen, Neogene Hegau Volcanic Province = Hegau Volcanic Suite (TK500 / Gouffon et al. 2024), Vulcaniti della Hegovia

Deutsch: Ortler-Decke
Français: Nappe de l'Ortler
Italiano: Falda dell'Ortler
English: Ortler Nappe

The Upper Austroalpine Ortler Nappe overthrusts the Campo Nappe along the WNW–ESE striking Zebrù Thrust, which follows the incompetent sediments of the Raibl Group over most of its strike as the dominant basal décollement horizon. Only small occurrences of basement and pre-Carnian sediments are preserved locally, the main Mesozoic sequence being dominated by massive Late Triassic sediments. The hangingwall of the Ortler Nappe is defined by the Trupchun-Braulio Thrust that formed during a later stage of the Cretaceous orogeny and juxtaposed the Quattervals Nappe (in the west) and the Umbrail-Terza Slice Complex (in the east) over the Ortler Nappe.

Ortler = Ortles (Italia)

Ortlerdecke (Roesli 1927, Staub 1934), Ortler-Einheit (Dössegger 1987), Ortler Zone = Ortler-Sedimente (Spillmann 1993), Ortler Nappe (TK500 / Gouffon et al. 2024)

Deutsch: Grüenhorn-Casanna-Schuppenkomplex
Français: Complexe d'écailles du Grüenhorn-Casanna
Italiano: Complesso di scaglie del Grüenhorn-Casanna
English: Grüenhorn-Casanna Slice Complex

The Grüenhorn-Casanna Slice Complex is considered as an independant tectonic klippe correlated with the Err Nappe Complex and overlying the Arosa Zone. It is made of two small superimposed thrust sheets with a similar sedimentary series of Lower Austroalpine affinity. Near Davos, further comparable slices of Mesozoic strata of Lower Austroalpine affinity (such as the Weissfluh Slice) are also found within the Arosa Zone and considered a part of the mélange of the Arosa Zone.

Grünhorn = Grüenhorn / Casanna (GR) oberhalb Klosters

Grünhorn-Casanna-Schuppen = Grünhorn-Casannaschuppe = Kristallin der Aroser-Schuppenzone (Gees 1954), Casanna-Grüenhorn-Komplex (Weissert 1974, Lüdin 1987), Grüenhorn-Casanna-Schuppe (Pfiffner 2015), Grüenhorn-Casanna Slice Complex (TK500 / Gouffon et al. 2024)

Deutsch: Quarzphyllit der Garvera-Zone

Graublaue bis weisse, feinsandige Phyllite (quarz- und albitreich, mit teilweise karbonathaltigen Quarzknauern) der mittleren und südlichen Teilen des Permokarbons der Garvera-Zone.

Graublaue bis weisse, feinsandige Phyllite, quarz- und albitreich (Niggli et al. 2008)