gastrolith

anatomy

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June 29, 2026

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A gastrolith is a stone or pebble that an animal ingests to aid in the grinding of food during gastric digestion. This process is particularly relevant in the anatomy of many birds, where the gizzard, a part of the stomach, is modified for grinding food. The gizzard, located between the crop and the intestine, has a muscular wall that can contain gastroliths. These stones help mechanically break down food, functioning similarly to teeth in other animals. Some other creatures, like earthworms and certain moss animals, also possess gizzard-like structures.12

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dinosaur
The plant eaters
…the food-pulverizing process, but such gastroliths, or “stomach-stones,” are only rarely found in association with dinosaur skeletons. (A Seismosaurus specimen found with several hundred such stones is an important exception.)
Read More
…the food-pulverizing process, but such gastroliths, or “stomach-stones,” are only rarely found in association with dinosaur skeletons. (A Seismosaurus specimen found with several hundred such stones is an important exception.)
Read More