Kremmling Cretaceous Ammonite Locality

Location: Grand County
Size: 1037 acres
Designated: 1986
Landowner/Manager: Bureau of Land Management and The State Land Board

This site has exceptionally large and well-preserved fossils of giant ammonites (Placenticeras spp.) and many other groups of marine invertebrate fossils, including nautiloids, bivalves and gastropods which lived about 70 million years ago.  The fossil ammonites found here are the largest specimens of this Cretaceous group known in North America.  The area's exceptionally diverse fossil biota, including rare tropical and subtropical forms, represents an unusual fossil assemblage in North America.

Please be aware that this site contains features of state-wide significance. Collection is prohibited at all times with out proper permits.