Locality: In the Black Hills near Hermosa, South Dakota

Age: Early Cretaceous, Barremian stage, 125 million years

Discoveries at this site include:

• The oldest known bird trackways in the Americas

• The oldest known quadrupedal ornithopod trackway

• Theropod trackways of various size and morphology

Press Release of August 9, 2001

Site maps and pictures

Research quality cast replicas available