Elimia tenera fossil gstropods- Agatized Green River CC

These Elimia tenera fossil gstropods CC are agatized coquinite of the Green River Formation. This piece is 3.5 inches long by 2.5 inches wide and 2 inches thick. The fossils are from the Eocene Epoch, and are about 38 to 54 million years old. This piece was found in Wyoming. You can see in the picture several fossils exposed. What you cannot see is that this rock is composed almost entirely of fossil shells!