There has always been a gap in the knowledge about vertebrate evolution in North America during the middle Eocene (56-34 MYA), in contrast to what we know about the early and late Eocene. The Uinta Basin of northeastern Utah has the most complete interval of the middle Eocene exposed. The Uinta Basin, containing the Uinta and Duchesne River Formations, are the keys to piecing together the middle Eocene.

The Uinta Basin team has begun a comprehensive research project that integrates paleontology, paleoecology, stratigraphy, geochemistry, and palynology to track changes in vertebrates and the environment before, during, and after the MECO (Middle Eocene Climatic Optimum) event in the Uinta Basin. Members of our team have been doing work since 1994 with a range of focuses for our research. Please explore our website to learn more about the history and science of the Basin and the work that we have done, explore our socials, and ask questions using our contacts.