Los Blanquitos Formation
The Los Blanquitos Formation is a geological formation in Salta Province, Argentina whose strata date back to the late Campanian to early Maastrichtian age of the Late [Cretaceous Period]. Dinosaur remains are among the fossils that have been recovered from the formation. The formation consists of friable, micaceous, grayish-red sandstones with quartz pebbles containing small carbonate veins. In the base of this layer the remains of a titanosaurid dinosaur were discovered. Above the layer with bones appears a lens of thick, greenish-gray, calcareous, very hard sandstone with pebbles and gravel. The bones were covered by a "halo" of the same rock but of greenish or grayish color, especially visible because the normal sediment is red. The bed thickness is.
Vertebrate paleofauna
- Guemesia ochoai - an abelisaurid theropod dinosaur, known from a nearly complete braincase
- Unquillosaurus ceiballi - a theropod dinosaur, known from a pubis
- ?Titanosaurus sp. - a sauropod dinosaur