Hell Creek Formation

located in:

• Montana

  Sources: Dinosaur census reveals abundant Tyrannosaurus and rare ontogenetic stages in the Upper Cretaceous Hell Creek Formation (Maastrichtian), Montana, USA

• North Dakota

  Sources: Dinosaur census reveals abundant Tyrannosaurus and rare ontogenetic stages in the Upper Cretaceous Hell Creek Formation (Maastrichtian), Montana, USA

• South Dakota

  Sources: Dinosaur census reveals abundant Tyrannosaurus and rare ontogenetic stages in the Upper Cretaceous Hell Creek Formation (Maastrichtian), Montana, USA

Appears in2 items

• 
  The Age of Dinosaurs2 items
  • Hell Creek Formation67.2 Ma
  • Triceratopsc. 66.5 Ma

Sources

1. ArticleDinosaur census reveals abundant Tyrannosaurus and rare ontogenetic stages in the Upper Cretaceous Hell Creek Formation (Maastrichtian), Montana, USA