All of our Fossils are 100% Genuine Specimens & come with a Certificate of Authenticity. Location: Sentinel Butte Formation, N. 79 x 66 x 10mm (3.11 x 2.6 x 0.39 inches). Ginkgo tree fossil remains are known as living fossils , this means that the fossil specimens are visually indistinguishable from species still present today! […]