1.2" Serrated Tyrannosaur Tooth in Rock - Judith River Formation

Serrated Tyrannosaur Tooth in Rock - Judith River Formation #150770

This is a serrated, 1.2" long Tyrannosaur tooth on stone from the Judith River Formation of Montana. This formation is approximately 75 million years old, or about 9 million years older than the Hell Creek Formation which also produces T. rex.

This tooth was found fragmented within the sandstone and has been stabilized in the rock it was found in.

Three species of tyrannosaur have been described from the Two Medicine & Judith River Formations: Albertosaurus, Gorgosaurus and Daspletosaurus. Research done on teeth from these three tyrannosaurs has concluded that isolated teeth are statistically impossible to assign to a specific genus because they are so similar.

Morphometry of the teeth of western North American tyrannosaurids and its applicability to quantitative classification

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