a land mass in western North America during the Cretaceous Period

although its exact classification has been the subject of debate in the scientific community

un área rica en fósiles que ha proporcionado valiosa información sobre la fauna de dinosaurios de esa época

two medium-sized herbivorous Pachycephalosaurus graze peacefully in a clearing surrounded by vegetation

an adaptation to support their large mass and move on soft ground

Amargasaurus cazaui Dreadnoughtus a land mass in westernAmargasaurus cazaui is a sauropod dinosaur that lived during the Early Cretaceous period, approximately 129 to 122 million years ago, in what is now South America, specifically in the region of Argentine Patagonia. Discovered in the La Amarga Formation, in the province of Neuqun, and first described in 1991, Amargasaurus is a member of the Dicraeosauridae family, a group of relatively small sauropods with distinctive morphological characteristics.