| Lacking teeth, they swallow pebbles that act as gastroliths to grind food in the gizzard. |
| Such stomach stones or gastroliths have been reported from the gut regions or found nearby of prosauropods, sauropods and ornithopods. |
| The only non-molluscan fauna include two small crayfish gastroliths. |
| When found in association with fossils, gizzard stones are called gastroliths. |
| Not only did the more mature specimens lack teeth and seem to have had a beak, they also had rocks in their gullet, called gastroliths, that modern birds use for mechanical digestion. |
| One section I found most fascinating was Chapter Six on gastroliths. |
