Mulichinco Formation

The Mulichinco Formation is a geological formation in Argentina. It is Valanginian in age and is predominantly terrestrial, being deposited at a time of marine regression in the Neuquén Basin, and predominantly consists of siliciclastic rocks. 
Fossil content.
Dinosaur remains have been found in the formation, including those of the dicraeosaurid "Pilmatueia" and carcharodontosaurid "Lajasvenator".