This pteranodon jaw is from the Niobrara Chalk of western Kansas. The jaw measures 30.5 inches long. The jaw has been set in a plaster matrix and framed in oak. Frame measures 35" x 7.5" x 2.5" deep. This jaw has significant reconstruction to show the shape. Pteranodon bones are very thin and fragile. Often in the chalk, fossils are surrounded with plant roots highly degrading the fossils, especially delicate pieces. That was the case with this one. The lighter brown is restoration where as the dark brown is original bone. Some of the bone has a gray calcite layer on it (near the lower hinge). Some of the gray along the jaw is original matrix. This matrix was left alone as it held the shape of the original bone and contains some fine bone fragments. Please email us at firstname.lastname@example.org for more info or have questions. Exact locality will be included with purchase.