Activity David Hanes posted a new specimen. 5 months, 2 weeks ago 5 months, 2 weeks ago 5 months, 2 weeks ago David Hanes has contributed specimen mFeM 86649 to myFOSSIL! Bill Heim replied 5 months, 1 week 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.