The Sânpetru Formation is an early Maastrichtian geologic formation located in Romania, near Sânpetru village, part of SântÃÂmÃÂria-Orlea commune. Dinosaur remains are among the fossils that have been recovered from the formation, comprising some of the fauna of HaÃÂeg Island.
The Sânpetru Formation crops out in the central to southern HaÃÂeg Basin along the BÃÂrbat River and comprises sandstones and mudstones deposited in a wet floodplain environment characterized by braided fluvial channels. The formation is correlated with the DensuÃÂ-Ciula Formation of the northern section of the same basin, both dating to the Maastrichtian of the Late Cretaceous.