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A gastrolith, also called a stomach stone or gizzard stone, is a rock held inside a gastrointestinal tract. Gastroliths in some species are retained in the muscular gizzard and used to grind food in animals lacking suitable grinding teeth. In other species the rocks are ingested and pass through the digestive system and are frequently replaced.
At least two specimens of Pterodaustro have been found, MIC V263 and MIC V243, with gizzard stones in the stomach cavity, the first ever reported for any pterosaur. These clusters of small stones with angled edges support the idea that Pterodaustro ate mainly small, hard-shelled aquatic crustaceans using filter-feeding. Such invertebrates are ...
This list of dinosaur-bearing rock formations is a list of geologic formations in which dinosaur fossils have been documented. List of stratigraphic units with dinosaur body fossils; List of stratigraphic units with dinosaur trace fossils. List of stratigraphic units with dinosaur tracks. List of stratigraphic units with ornithischian tracks
tr This is a list of stratigraphic units from which dinosaur body fossils have been recovered. Although Dinosauria is a clade which includes modern birds, this article covers only Mesozoic stratigraphic units. Units listed are all either formation rank or higher (e.g. group).
Paleontology or palaeontology is the study of prehistoric life forms on Earth through the examination of plant and animal fossils. [1] This includes the study of body fossils, tracks (), burrows, cast-off parts, fossilised feces (), palynomorphs and chemical residues.
The latest dinosaur being mounted at the Natural History Museum in Los Angeles is not only a member of a new species — it's also the only one found on the planet whose bones are green, according ...
The size of individual stones is often considerable. In 1991 an elasmosaurid specimen, KUVP 129744, was investigated, containing a gastrolith with a diameter of seventeen centimetres and a weight of 1300 grams; and a somewhat shorter stone of 1490 grams. In total, forty-seven gastroliths were present, with a combined weight of 13 kilograms.
If you like stone dinosaurs, a trip to Dinosaur Land is a memorable adventure. The park features more than 50 life-sized dinosaur statues that look as much as they did when it opened in 1963.