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Kremmling Cretaceous Ammonite Locality ACEC

Kremmling Cretaceous Ammonite Locality

Kremmling Cretaceous Ammonite Locality ACEC 

Location:    Northwest District, Kremmling Field Office (Grand County)

Size:    198 acres

Designated:   1984 Kremmling Land Use Plan

Land Manager:    Bureau of Land Management, Kremmling Field Office


Located about 10 miles north of Kremmling is the Kremmling Cretaceous Ammonite Locality ACEC/RNA.  This ACEC is managed for research and preservation of fossil resources and contains a rich fossil assemblage of giant ammonites (Placenticeras costatum) and other extinct species of marine fauna. Ongoing research by the University of South Florida has recently identified 10 new species of extinct shellfish from this locality. Fossils in the area have also been used to recover geochemical data to compare with that of modern corals to study modern environmental change and help answer questions about how much of the change can be attributed to natural cycles and how much can be attributed to human use of natural resources. The Scripps Institute has also used the stratigraphy to help date dinosaur fossils found in Mongolia. Kremmling Cretaceous Ammonite Locality is also a Natural Area under joint jurisdiction with Colorado Parks and Wildlife's Colorado Natural Areas Program.


BLM Kremmling Field Office |  2103 E. Park Avenue    |  P.O. Box 68  |  Kremmling, CO 80459 
(970) 724-3000  |  FAX:(970) 724-3066