Fossil Acer (Maple) Leaf - Green River Formation

This is a 3.48" fossil leaf from an indeterminate species of Maple tree of the genus Acer. It is Eocene in age and comes from the Green River Formation. The dark preservation contrasts well against the lighter shale matrix and fine details of the leaf structure can be seen. There is a crack repair that runs through the right lobe that is very faint.

It comes the Green River Formation and the area in Uintah County, Utah. This is the same formation that is famous for producing well preserved fish fossils, but a different member and location.