Middle Pennsylvanian Keeler Canyon Formation

Inyo County, California

Conodonts from the Middle Pennsylvanian portion of the Keeler Canyon Formation, Inyo County, California; minute tooth-like structures--technically termed denticles (and unrelated to modern jaws)--that helped process food in an extinct lamprey eel-like organism. Photograph from a specific scientific publication.

Return To Fossils In Death Valley National Park