Dinosaur Bone

Under polarized light, thin sections of fossilized dinosaur bones exhibit striking colors and patterns as evidenced by this photomicrograph. The term fossil refers to any preserved remains or imprint of a living organism (usually ancient), such as a bone, shell, footprint, or leaf impression. Most of the dinosaur fossils found today are mineralized bones, but they also include footprints, tracks, eggs, skin impressions, stomach stones (known as gastroliths), and fossilized feces (known as coprolites).