This Specimen has been sold.
Fossil Cedrelospermum Leaf & Equisetum (horsetail) Stem - Green River Formation
These are fossils plants detailing a leaf from Cedrelospermum nervosum & a stem from Equisetum winchesteri, an ancient horsetail. They are Eocene in age and comes from the Green River Formation. The dark preservation contrasts well against the lighter shale matrix.