Jurassic Dinosaur Bone Sphere
Dinosaur bone sphere
Morrison Formation
Upper Jurassic
This is a very fine 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 pink colors are caused by trace amounts of uranium minerals that were present during the fossilization process. The sphere is 15 cm in diameter.