Deutsch: Belledonne-Massiv Français: Massif de Belledonne Italiano: Massiccio di Belledonne English: Belledonne Massif
The Belledonne Massif is a Lower Helvetic External Massif of the French Alps. It is constituted of a pre-Variscan polycyclic basement (Precambrian to Early Cretaceous) intruded by Variscan granites and of a Mesozoic sedimentary cover. The Belledonne Massif is separated from the Aiguilles Rouges and Mont Blanc massifs by the axial depression of the Val Montjoie.
The obsolete term «Err-Carungas Nappe» refers to the Err Nappe (s.str.) and the underlying Carungas Slice, both confined to an area northwest of the Engadine Fault between Albulapass and Julierpass.
Deutsch: Tavrü-Schuppe Français: Écaille du Tavrü Italiano: Scaglia del Tavrü English: Tavrü Slice
Within the S-charl-Sesvenna Nappe, theTavrü Slice (formerly known as “S-charl-Oberbau”) consists entirely of a Norian to Cretaceous succession, volumetrically dominated by an over 2 km thick Hauptdolomit. It is completely detached from the Carnian Raibl Group. This slice, separated from the tectonically higher Ötztal Nappe by the Schlinig Thrust, suffered substantial internal extension in a domino-style.
The Ivrea-Ceneri Complex is a thick-skinned tectonic unit developped during the Alpine orogeny. It includes the lower crustal rocks of the Ivrea Zone and the WNW part of the middle to upper crustal Strona-Ceneri Zone. In the northwest, the Ivrea-Ceneri Complex is separated from the Canavese Zone by the Internal Canavese Fault, east of Locarno from the Central Alps by the Tonale Fault. In the east and southeast, the transition to the Upper Orobic Nappe is not clearly defined. The boundary can be traced along the Tamaro Thrust and the Lago Maggiore Fault. In the south, west of Lago Maggiore, the Ivrea-Ceneri Complex with its Mesozoic cover is overlain by the post-orogenic deposits of the Po Plain.
Ivrea-Ceneri Complex (TK500 / Gouffon et al. 2024)
