Deutsch: Gruf-Komplex Français: Complexe du (Monte) Gruf Italiano: Complesso del (Monte) Gruf English: Gruf Complex
The Gruf Complex is a polymetamorphic migmatitic unit of the Eastern Lepontic (Ticino Culmination), interpreted as a lower crust compartment (possibly related to the Adula Nappe) that was dragged up by the rise of the Bregaglia Intrusion. It directly underlies the Tambo Nappe and the ophiolitic Chiavenna Nappe to the north along a steeply N-dipping fault and follows the base of the Bregaglia Intrusion to the south.
Monte Gruf
Gruf migmatite complex (Gulson 1973), Gruf-Masse (Schmutz 1976), complesso dela Gruf (Wenk 1992), Bodengo-Gruf Unit (Berger & Mercolli 2007), Gruf complex (Galli et al. 2013)
Deutsch: (Internes) Mittelpenninikum der Westschweiz Français: Pennique Moyen (interne) de Suisse occidentale Italiano: Pennidico Medio (interno) della Svizzera occidentale English: (Internal) Middle Penninic of Western Switzerland
In Western Switzerland, the Middle Penninic subdomain comprises units located between the Sion-Courmayeur Nappe and the Tsaté and Zermatt-Saas nappes. These units were first grouped together within the “Grand St-Bernard Nappe” (Argand 1911), which was then subdivided into several nappes.
The Middle Penninic units are thought to be derived from the Briançonnais Terrane, which consisted of a polycyclic crystalline basement cut by Late Cambrian (ca. 500 Ma) and Permian (ca. 270 Ma) granitic intrusions, Permo-Carboniferous sediments that filled narrow basins and a characteristic Mesozoic – Paleogene sedimentary cover. Much of this Briançonnais cover was detached at the level of the Triassic evaporites to form some of the nappes in the Prealps.
Middle Penninic in Western Switzerland (TK500 / Gouffon et al. 2024)
Deutsch: Permische Metasedimente der Tavetsch-Decke Français: Métasédiments permiens de la nappe du Tavetsch Italiano: Metasedimenti permiani della falda del Tavetsch English: Permian metasediments of the Tavetsch nappe
Bläuisch-graue Chloritschiefer und -phyllite, die als permische Sedimentbedeckung der Tavetsch-Decke betrachtet werden.
Über Lithostratigraphisches Lexikon der Schweiz Das Lithostratigraphische Lexikon wurde als Nachschlagewerk für Geologinnen und Geologen konzipiert, um einen raschen Überblick über die schweizweit geb