Hell Creek Fossil Area
National Natural Landmark
Photo of Hell Creek Fossil Area
IN
BRIEF
The Hell Creek formation and valley is the type locality for Tyrannosaurus rex, Ankylosaurus magniventris, and Brachychampsa fontana, the oldest known true alligator. The Hell Creek Fossil Area has also produced several specimen of Triceratops prorsus and is where over 95% of T. rex museum specimens have come from. Ownership: Federal, State, private.
The Hell Creek formation and valley is the type locality for Tyrannosaurus rex, Ankylosaurus magniventris, and Brachychampsa fontana, the oldest known true alligator. The Hell Creek Fossil Area has also produced several specimen of Triceratops prorsus and is where over 95% of T. rex museum specimens have come from. Ownership: Federal, State, private.
DESIGNATION DATE
1966