Contact: Greg Borzo
University of Chicago Medical Center
Caption: Fossil herrings from the Eocene Green River Formation of the western United States where Colorado, Utah and Nevada meet. Herrings are one of the small-bodied groups of bony fishes that survived the end-Cretaceous extinction and persist to this day in marine environments.
Credit: Photo by Matt Friedman
Usage Restrictions: None
Related news release: Study unravels why certain fishes went extinct 65 million years ago