The Cloverly Formation is a geological formation of the early Cretaceous in the Aptian to Albian age. Although all my specimens are from Montana material can be found in Utah, Wyoming and Colorado. The most famous dinosaur in the Jurassic Park movie is found here, Deinonychus antirrhopus, however its not on steroids as it was portrayed in the movie. The size of an adult is still uncertain because of the lack of enough skeleton remains but of the ones found its estimated to be around 180 pound