Nemegt Uul

The Nemegt formation is a geological formation from Mongolia’s Gobi Desert that dates back to the Late Cretaceous. It lies on top of the Barun Goyot formation and sometimes collapses into it. It is made up of sediments from river channels and contains fish, turtles, crocodilians, birds, and a rich dinosaur fauna. It was associated with a wetter environment than when preceding strata were deposited, and there appears to have been some forest cover.

The Nemegt formation’s exact age is uncertain, however it is estimated to be Maastrichtian or maybe late Campanian in age, spanning around 76-65 million years. The presence of Saurolophus, a taxon also found in Alberta’s Horseshoe Canyon Formation, could indicate a 70 million-year-old Early Maastrichtian age.