Dinosaurs Historical Marker


Jordan ,Northeast Montana,Garfield County

Map Location

Historical Markers/Interpretive SignHistoric Sites
General info

Difficult to believe now, but 80 million years ago the middle of our continent was a shallow sea. This area, when not underwater, was part of a hot, humid tropical coastline of marshes, river deltas, and swamps, bearing dense vegetation probably similar to that found on the southern coast of Louisiana today.

Fossils tell us that turtles, crocodiles, lizards, toads, fishes, small primitive mammals, and dinosaurs lived on this coastal plain. Many of the most complete dinosaurs on display in the world were gathered here in Garfield County. The first Tyrannosaurus rex skeleton came out of its hills in 1902. In fact, four of the six tyrannosaurs found in the world are from Garfield County and five of the six are from Montana. The Garfield County Museum in Jordan holds replicas of a tyrannosaur skull, a duckbill dinosaur skull, and a triceratops skeleton.

Paleontologists were puzzled by the scarcity of young dinosaurs and eggs in this rich fossil area. One explanation was discovered in 1978 on the eastern front of the Rocky Mountains about 300 miles west of here. Hundreds of eggs from at least three different dinosaur species and thousands of whole and partial dinosaur skeletons were

About Us

Our mission is to provide the most comprehensive information site for the state of Montana. We welcome public input and comments.


1627 W. Main #447
Bozeman, MT 59715

Contact Us

Created with love by New Times Media Corporation

We're New Times Media - a friendly and fun group of people. At New Times Media we love to share anything and everything we know about the great state of Montana, so we created this site to make learning about our state as easy as possible. Our site is free to use and has the simplest possible user interface.

Privacy policy:

We use Google Analytics for site usage analytics. Your IP address is saved on our web server, but it's not associated with any personally identifiable information. We want you to enjoy and benefit from our site without worrying about who is tracking you (OK, so Google might track you, but that’s not us!)

Terms of service: the legal stuff

By using our site you agree to our Terms of service. TLDR: You don't need an account to use our site. Our site is free of charge and you can use it as much as you want. You need an account if you wish to list your business or control your business information. You can't do illegal or shady things with a business listing on our site. We may block your access to your page(s), if we find out you're doing something bad. Share anything you see, but don’t use our stuff for your own use without permission from us. We’re not liable for your actions and we offer no warranty. We may revise our terms at any time.