Although the site is open to scientists and the general public, vehicle access is restricted and the site has no visitors center. Please note that visitors are not permitted to collect fossils from the Kremmling site. Concretions eroding out of the hillside can reveal the fossil horizon.
Ammonites are extinct relatives of modern cephalopods.
These ancient mollusks had coiled shells ranging in size from less than a quarter inch to more than six feet in diameter. During the age of the last dinosaurs, the Western Interior of North America was covered by the Cretaceous Seaway, a shallow sea that advanced and retreated several times. Many species of ammonites lived in the Cretaceous Seaway, and their fossils can be found throughout western North America today. Dr. Kirk Johnson is the DMNS curator of fossil plants and invertebrates. These fossils became the centerpiece of the Museum's Cruisin' the Fossil Freeway exhibition as well as the subject of an advanced invertebrate paleontology course in 1999.