FossilMuseum.net - Take a tour on a virtual fossil museum.

fossilnews.com/2000/grnrv/grnrv.html - Detailed history of the Green River Formation.

ucmp.berkeley.edu/tertiary/eoc/greenriver.html - More studies and images of GRF area.

coloradomtn.edu/campus_rfl/staff_rfl/kohls/eocene.html - GRF insects from the eocene era.