MadSci Network: Evolution

Subject: What are the identifying traits of a gastrolith?

Date: Thu Nov 4 12:48:57 1999
Posted by Yvonne Sorovacu
Grade level: grad (science) School: Science Museum of Virginia
City: Richmond State/Province: VA Country: USA
Area of science: Evolution
ID: 941737737.Ev

We have a collection of fossils we use for a workshop.  One of these is a 
gastrolith, stones swallowed by dinosaurs to assist in food digestion 
(much like stones in a bird gizzard.  How can scientists tell that these 
rocks were once inside of a dinosaur at least 10,000 years ago?

Re: What are the identifying traits of a gastrolith?

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