Deutsch: Zermatt–Saas-Fee-Decke
Français: Nappe de Zermatt–Saas Fee
Italiano: Falda Zermatt–Saas Fee
English: Zermatt–Saas Fee Nappe
The Zermatt-Saas Fee Nappe is an Upper Penninic tectonic unit of the Western Alps consisting of rocks of Middle to Late Jurassic age derived from the Piemonte-Liguria Ocean. They are mostly large bodies of serpentinites, metagabbros and metabasalts in which pillow structures are locally well preserved. Oceanic sediments overlie these ophiolites, in particular metacherts (metaradiolarites). All of these rocks display relics of Early Eocene high-pressure metamorphism in eclogite facies.
Zermatt (VS)
Groupe de Zermatt (Argand 1908, Bartholmès 1920, Rutsch et al. 1966), branche de Saas (Argand 1911b), Muldenzone Zermatt-Saas = Zermatter-Mesozoikum = Zermatterzone (Eichenberger 1926), Saaserzüge (Roesli 1946), Ophiolith-Decke von Saas-Zermatt (Güller 1947), Zone von Zermatt-Saas-Fee (Bearth 1952), Ophiolithzone Zermatt-Saas-Fee (Bearth 1953, Kopp 1974), Zone de Zinal-Zermatt (Trümpy 1976), Eastern Piemonte Zone = Zermatt-Saas Zone (Compagnoni et al. 1977), Zermatt-Saas ophiolite zone (Barnicoat & Fry 1986, Barnicoat 1988), Zermatt-Saas-Decke (Froitzheim), zone de Zermatt-Saas Fee (Ganguin 1988, Vannay & Allemann 1990), unità inferiore della Zone Piemontese = unità di Zermatt-Saas (Dal Piaz et al. 1992), Zermatt-Saas ophiolitic nappe (Bill et al. 2001), Zermatt-Saas unit (Babist et al. 2006, Ellis et al. 2016), Zone of Zermatt-Saas Fee (Berger & Mercolli 2007), Lower ophiolitic unit = Zermatt-Saas unit (Dal Piaz et al. 2015), Zermatt–Saas Fee Nappe (TK500, Gouffon et al. 2024)