Tectonic wedge geometry at Bardas Blancas, southern Andes (36 °S), Argentina

A tectonic wedge at the mountain front of the Cordillera Principal, Mendoza province, Argentina, shows some geometrical features that depart from examples described elsewhere. This wedge underthrusts the roof sequence beneath a blind thrust. The wedge is deformed by imbricate backthrusting that branches into the hangingwall ramp of the leading horse. This backthrust system contributed to the uplift and shortening of the mountain front.