Deutsch: Unterostalpin
Français: Austroalpin inférieur
Italiano: Austroalpino inferiore
English: Lower Austroalpine
The Lower Austroalpine comprises tectonic units that are derived from the former distal continental margin of the Adriatic plate, which was affected by Jurassic extensional detachment faults. The strongly deformed pre- and syn-rift strata became intensely reshaped and reworked during the closure of the Piemonte-Liguria Ocean and subsequent Alpine continental collision.
The facies of syn- and post-rift sediments of the Lower Austroalpine has remarkable similarities with those found in the Canavese area around the town of Ivrea, which is a part of the South Alpine derived of the western part of the Adria.
Unterostalpin (Hoek 1906), unterostalpine = grisonide Elemente (Roesli 1946), Unterostalpine Decken (Trümpy 1974), Lower Austroalpine = LAA (Furrer et al. 1985), Unterostalpin = UOA (Frank 1986, Naef 1987), Austroalpino inferiore (Montrasio et al. 2012), Lower East Alpine, Lower Austroalpine (TK500 / Gouffon et al. 2024)