- ...saurs comes from a variety of fossilized sources; bones, feces, trackways, gastroliths, feathers, skin impressions, some internal organs and the scant discovery o ...they enter their stomach. When related to dinosaur finds they are called [[gastroliths]]. [[Paleontologist]]s have used these stones to efficiently trace possibl25 KB (3,809 words) - 18:41, 18 April 2007