What kind of dinosaur was found in the badlands in Montana?

In the badlands of Montana, one of the most famous dinosaurs found is the Tyrannosaurus rex, a large carnivorous theropod known for its powerful jaws and small arms. Additionally, the area has yielded fossils of other species, such as the Triceratops, a herbivorous dinosaur characterized by its three facial horns and frill. The rich fossil beds in Montana provide valuable insights into the diverse ecosystems of the Late Cretaceous period.