“As found” pic of 13 articulated mosasaur vertebrae from the Cretaceous Chalk of Kansas. Perfectly exposed by erosion. From near the base of the tail where the rear paddles articulate. [OC]

“As found” pic of 13 articulated mosasaur vertebrae from the Cretaceous Chalk of Kansas. Perfectly exposed by erosion. From near the base of the tail where the rear paddles articulate. [OC]