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.
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.
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)
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.
Das im Westschams vorkommende Areua-Bruschghorn-Melange lässt sich über das Scharnier der liegenden Niemet-Beverin-Falte mit dem Martegnas-Melange im Ostschams verbinden.
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.
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.
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.
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)
About Lithostratigraphic Lexicon of Switzerland This online lexicon has been designed as a handy reference tool for geologists working in academic research (including most particularly students who ar
