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Dinosaur and Paleontology Dictionary
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

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GASTROLITHS
or GIZZARD STONES


Many animals swallow small rocks that stay in their stomachs. These rocks (called gizzard stones or gastroliths) tumble around in their stomachs, helping to grind up tough food fibers (like leaves, twigs, pine needle, etc.). When gastroliths are found with (or inside) dinosaur fossils, they are typically very smooth and polished from years of tumbling around in a dinosaur's digestive tract.

Some of the animals that use gizzard stones are:


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