strati.ch - Lithostratigraphic Lexicon of Switzerland

Representation and status

Origin of the Name: Lebendun = Vallone del Vannino (Italia), Alta Val Formazza (N.B. Punta Lebendun und Passo di Lebendun stehen in der Monte-Leone-Decke)

Historical Variants: nappe II = Lebendun (Argand 1911), rückgefaltete und eingewickelte Teil der Bernharddecke = Lebendungneiszone = Lebendundecke (Grütter 1929), Lebendun-Lappen (Niggli et al. 1936), Falda Lebendun (Godenzi 1963), Lebendun-Zone = Lebendun-Zug [?] (Wieland 1966), Lebendunserie (Joos 1967), Ricoprimento Lebendun = complesso Lebendun = lobo di Lebendun (Bianconi 1971), Lebendun-Decke (Bearth 1973), falda di ricoprimento del Lebendun, Lebendun-Zone, Lebendun-Serie (Etter 1984), nappe du Lebendun (Escher et al. 1987, Spring et al. 1992), nappe n°2 = Lebendun nappe (Carrupt 2003), Lebendun nappe (Steck et al. 2013), Falda del Lebendun (Della Torre & Maggini 2015)

Age at top

Note about top

unsicher

Age at base

Note about base

unsicher

Geographical extent: Alpi Lepontine: Crevola d'Ossola, Val Divedro, Zwischbergental, Alte Kaserne, Val Devero, Lebenduntal, Val Formazza, Basodino, Val Bedretto [kommt auf den GA25-Blättern 034_Basodino, 061_Simplon, 068_Val-Bedretto, 093_Brig, 138_Ambri-Piotta, 145_Bosco/Gurin, sowie XXX_Binntal vor].

Definition: Steck Albrecht, Della Torre F., Keller Franz, Pfeifer Hans-Rudolf, Hunziker Johannes, Masson Henri (2013) : Tectonics of the Lepontine Alps : ductile thrusting and folding in the deepest tetonic levels of the Central Alps. Swiss Journal of Geosciences, 106/3, 427-450

p.435: The Lebendun nappe is composed of a polymictic conglomerate and a micaschist (‘‘schisti bruni’’, Burckhardt 1942; Burckhardt and Gu¨nthert 1957; Joos 1969). Pebbles of Triassic dolomite testify the post-Triassic, possibly Cretaceous age of these sediments (Rodgers and Bearth 1960; Spring et al. 1992). It occupies a large zone to the north of the Antigorio nappe and Sambuco unit. Another up to 50 m thick band of Lebendun conglomerate is exposed on the mountain ridge to the north of the Pizzo di Bronzo in the upper Valle dell’Isorno, between the Bosco zone on top and the Antigorio gneiss at the base. The tectonic position of the Lebendun conglomerates suggests that they have been thrust from the south of the Maggia and the north of the Monte Leone nappes (Fig. 4).