Western Interior Sea guide is online

Our field guide to the Western Interior Sea is now online! This guide is organized with separate sections focused around different groups of animals whose fossils are found in deposits linked to the waters which once covered the Great Plains during the late Cretaceous period. This guide currently contains entries and illustrations for around 430 Cretaceous genera found in late Cretaceous marine deposits found from northern Canada to Texas. 

You can access this guide by clicking on the field guide link on our homepage.