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

The Corvatsch Slice, located southeast of the Engadine Fault, can be seen as the equivalent of the Err Nappe. It is predominantly made up of intensely deformed pre-Mesozoic basement. Its Mesozoic cover is only rarely preserved just below the overlying Bernina Nappe (e.g., at Fuorcla Surlej).

Piz Corvatsch (GR)

Grevasalvas-Corvatsch-Teildecke (Naef 1987), Corvatsch-Teildecke (Spillmann 1993), Corvatsch Slice (TK500 / Gouffon et al. 2024)

Deutsch: «Heller Dolomit mit Tufflagen» (Kalkberg)
Français: «Heller Dolomit mit Tufflagen» (Kalkberg)
Italiano: «Heller Dolomit mit Tufflagen» (Kalkberg)
English: «Heller Dolomit mit Tufflagen» (Kalkberg)

Gebankte, hellgraue, weiss anwitternde Dolomite mit Gastropoden und Diploporen an der Basis.

Heller Dolomit, an der Basis mit Tuff- und Tuffitlagen  (Wyss & Isler 2007)

Deutsch: Südalpin
Français: Sudalpin
Italiano: Sudalpino
English: Southalpine

The South Alpine tectonic domain exposes a complete section of the Adriatic continental crust from ultramafic (slices of uppermost continental mantle lithosphere), mafic and felsic granulite-facies rocks (lower continental crust: Ivrea Zone) through medium- and low-grade basement rocks (middle–upper continental crust: Strona-Ceneri and Val Colla zones, basement of the Orobic units) to unconformably overlying non-metamorphic Late Carboniferous sediments that were involved in post-Variscan folding.

The detached Variscan continental crust and its overlying Permian to Miocene sedimentary cover form a fold-and-thrust belt, the southern S-vergent back-chain of the Alps, separated from the other domains of the Western and Central Alps to the west by the Canavese Fault and to the north by the Tonale Fault. Both faults are part of an Oligocene–Miocene post-collisional system of transpressive transfer faults along the northwestern boundary of the Adriatic indenter.

Southalpine, Alpi meridionali lombarde (Godenzi 1963), Southern Alps = Alpi meridionali (Dal Piaz et al. 1973), Südalpen (Trümpy 1974), Sudalpino = Alpi meridionali (Sciesa 1991), Alpi Meridionali = Sudalpino (Dal Piaz et al. 1992a), Südalpin (Spillmann 1993)

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

The Campo Nappe is the largest unit of the Upper Austroalpine Campo Nappe Complex and predominantly consists of Variscan basement, locally intruded by Permian magmatites (e.g., Sondalo Gabbro, Martell Granite). This nappe tectonically overlies the Masuccio Nappe in the southwest and the Languard Nappe in the northeast and extends all along the base of the tectonically higher Ortler Nappe. Its former Permian–Mesozoic cover has been almost completely detached very early during WNW-directed Late Cretaceous thrusting and is not present nowadays due to erosion, except as small occurrences more or less attached to the basement of the Campo Nappe.

Val di Campo = Val da Camp (GR)

mittelostalpine Decke = Campo-Decke (Alb. Heim 1922), Campodecke (Rösli 1928, Spillmann 1993), Campo-Decke s.l. > Campo-Decke s.str. (Staub 1946), falda di Campo (Pozzi 1957), falda Campo (Godenzi 1963, Montrasio et al. 2012), Campo-Languard-Einheit (Dössegger 1987), Campo Nappe (TK500 / Gouffon et al. 2024)

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

The Lower Austroalpine Carungas Slice, consisting of a band of predominantly overturned Mesozoic sediments and its associated crystalline basement, forms the hangingwall of the Platta Nappe and the footwall of the Err Nappe. This slice extends from east of Savognin all the way to the Julierpass road above Bivio, along the western margin of the Err Nappe (Manatschal & Nievergelt 1997, their “lower Err Nappe”). The small portion of crystalline rock wedged between the two branches of the Engadine Fault near Sils Maria is also related to the Carungas Slice. This slice is derived from the most distal part of the former Adriatic continental margin.

Piz Carungas (GR)

Schiefer-Hornsteinzone (---), Carungas-Decke (Cornelius 1932), Albuladecke = Carungasdecke (Staub 1934), Carungasdecke (Cornelius 1935, Stöcklin 1949, Spillmann 1993), --- (Froitzheim 1992), Carungas-Einheit (Furrer et al. 2015), Carungas Slice (TK500 / Gouffon et al. 2024)

Deutsch: Grava-Decke
Français: Nappe de la Grava
Italiano: Falda della Grava
English: Grava Nappe

The Lower Penninic Grava Nappe is folded around the front of the Adula Nappe and the Lunschania Antiform. In an overturned tectonic position, it can be followed all the way into a synform located between the Simano and Leventina-Lucomagno nappes. Westward it is found as a klippe in the core of the Molare Syncline and possibly pinches out in the Piora-Peiden Slice Complex between Lago Ritom and Airolo.

The Grava Nappe overlies the Aul Nappe with a basal mélange zone, which contains Early Jurassic Gryphaea-bearing limestones, metabasalts and dark shales. The rest of the nappe consists of Cretaceous «Bündnerschiefer».

Alp Grava (GR), Valser Tal

Grava Nappe (Berger & Mercolli 2007, Berger et al. 2017), Grava-Decke (Wyss & Wiederkehr 2017)

Die Grava-Decke bildete ursprünglich die nördliche Fortsetzung der Tomül-Decke.

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

The Liebenstein Nappe represents the continuation of the Wildhaus Mélange in Austria. It consists of a slice complex including a “wildflysch” (“Feuerstätter Nappe”).

Liebenstein (Allgäu, S-Deutschland)

Liebensteiner-Decke = Hochhelvetikum (Allemann & Blaser 1951), Schuppenzone von Vorarlberg = "Liebensteiner Decke" (Bayer 1982), Liebensteiner Decke (Tollmann 1985), Liebenstein-Schuppenzone (Friebe 2007), Liebenstein Nappe (TK500 / Gouffon et al. 2024)

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

The Ötztal Nappe forms the main part of the Ötztal Nappe Complex. It consists mainly of polymetamorphic paragneisses with minor orthogneisses and amphibolites.

Ötztal Nappe (TK500 / Gouffon et al. 2024)

Deutsch: Externes Penninikum der Zentral- und Ostschweiz
Français: Pennique Externe de Suisse centrale et orientale
Italiano: Pennidico Esterno della Svizzera centrale e orientale
English: External Penninic of Central and Eastern Switzerland

In Central Switzerland, external Penninic units comprise Lower Penninic flysch nappes and some klippes of Middle Penninic units overlain by rare remnants of Upper Penninic and Austroalpine units (from west to east: Giswilerstock, Stanserhorn, Buochserhorn, Mythen and Iberg klippen).

Penninic in central and eastern Switzerland (TK500 / Gouffon et al. 2024)

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

The Avers Nappe is an Upper Penninic tectonic unit of eastern Switzerland made up of shaly-calcareous-sandy marine sediments and ophiolitic rocks originating from the Piemonte-Liguria Ocean. This nappe represents an accretionary wedge at the base of an upper plate consisting of the other Upper Penninic and overlying Austroalpine nappes. This wedge directly overlies the Mesozoic cover of the Middle Penninic Suretta Nappe and probably formed in the Early Paleocene. The basal thrust of the Avers Nappe was deformed congruently with the Suretta Nappe, and both units were later back-folded together in the upper limb of the huge Niemet-Beverin Backfold. A backthrust that formed during this same phase brought part of the Middle Penninic Schams Nappe Complex back towards SE over the Avers Nappe. In its southernmost part, a large normal fault (Turba Mylonite Zone) separates the Avers Nappe and the backthrust Schams and Tomül nappes in the footwall from the Platta and Malenco-Forno-Lizun nappes in the hangingwall.

Avers (GR)

«synclinal» de l'Avers (Trümpy 1970), Externer Piemont-Trog = Avers (Büchi & Trümpy 1976), Avers-Zone, Avers Nappe (TK500 / Gouffon et al. 2024)