Deutsch: Bosco-Zone
Français: Zone de Bosco
Italiano: Zona di Bosco
English: Bosco Zone
The Bosco Zone (Western Lepontic) is situated in the western (lower) limb of the large polyphase Alpe Bosa-Wandfluhhorn Fold (located between the Maggia and Antigorio valleys), where it is surrounded by the Bombogno Zone (resp. the Antigorio and Monte Leone nappes). It consists of a crystalline basement of sedimentary origin (micaschists) intruded by orthogneiss masses and veins. It underwent an Oligocene amphibolite facies metamorphism.
Walser Gemeinde Bosco / Gurin (TI)
Boscoserie (Grütter 1929), Bosco-Serie (Wieland 1966), Bosco-Gurin unit (Merle & Le Gal 1988), Bosco unit (Steck et al. 2013, Steck et al. 2015), Zona tettonica di Bosco = Zona di Bosco (Della Torre & Maggini 2015), Bosco Zone (Gouffon et al. 2024)