Previous Next / Research into the rich dinosaur ecosystems from the Late Cretaceous of western North America to understand patterns of evolution and paleobiogeography Stretching from northern Alaska to central Mexico, the Campanian rocks of North America preserve the most comprehensive record of terrestrial evolution between 84 and 72 million years ago. During this period, North America was divided into two separate landmasses, Laramidia in the west and Appalachia in the east, by the extensive Western Interior Seaway. Nearly the entire Campanian record from Laramidia comes from the fossil-rich basins of Alberta and Montana, though discoveries in Mexico, Texas, New Mexico, and Utah have substantially expanded our understanding of southern Laramidia. Dinosaur ecosystems, largely preserved in foreland basins between rising mountains to the west and fluctuating seas to the east, show interesting patterns of endemism and evolution at a time of peak stability and diversity. The Laramidia Project is a multidisciplinary, collaborative project seeking to reconstruct local paleoecosystems to understand broader patterns of biotic distribution, paleoclimate, and evolution. Currently, the project is focused on discoveries from southern basins in Utah and New Mexico, with additional work in Colorado and Texas. This work has already recovered amazing new dinosaurs, new plant communities, and other secrets from the long-lost landmass of Laramidia.