Activity David Hanes posted a new specimen. 1 year, 10 months ago 1 year, 10 months ago 1 year, 10 months ago David Hanes has contributed specimen mFeM 86649 to myFOSSIL! Bill Heim replied 1 year, 10 months ago The Yorktown formation there ranges from early to late Pliocene. Without knowing which layer it came out of I would just leave it as Pliocene. Extremely nice condition.