All of our Fossils are 100% Genuine Specimens & come with a Certificate of Authenticity. Location: Sentinel Butte Formation, N. 72 x 65 x 17mm (2.83 x 2.56 x 0.67 inches). Ginkgo tree fossil remains are known as living fossils , this means that the fossil specimens are visually indistinguishable from species still present today! […]