1.52" Tyrannosaur Tooth On Stone - Judith River Formation

 
This is a 1.52" 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 has a feeding worn tip.

The tooth has been compressed during fossilization which caused some cracking. The tooth has a repair and the surrounding rock has been stabalized. The rock contains unrelated bone, tooth and shell fragments.

There are three described Tyrannosaurs from the Two Medicine Formation & Judith River Formation, 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 genre because they are so similar.

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


DETAILS
SPECIES
Albertosaurus, Gorgosaurus or Daspletosaurus
LOCATION
Eastern Montana
FORMATION
Judith River Formation
SIZE
1.52" tooth, 2.3 x 1.6" on stone
CATEGORY
SUB CATEGORY
ITEM
#123514
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