Green River Fish Fossil

This 5-inch Green River Fish Fossil, embedded in a 7-by-5-inch rock, originates from the renowned fossil quarries near Kemmerer, Wyoming. Extracted from the highly sought-after 18 Inch Layer, the fossil is identified through nocturnal collection under high-powered lights, which reveal subtle “ghost” outlines beneath the surface. Intensive manual preparation exposes the exquisitely preserved Diplomystus and other Fossil Lake species, offering an exceptional example of Green River fauna. This specimen holds significant value for collectors and researchers interested in mid-Eocene aquatic ecosystems.