Jurassic Morrison Dinosaur Bone Sphere VF-D-16-002Agate Dinosaur Bone Sphere Morrison Formation Upper Jurassic Utah This is a top quality example of agatized dinosaur bone from the Morrison Formation of Utah. The fossilized internal structure of the bone is perfectly preserved. The specimen is most likely from a sauropod dinosaur and probably from the distal end of a limb bone. The vivid colors are caused by trace amounts of uranium minerals that were present during the fossilization process. The