Modern Location: Montana, North 
and South Dakota, and Wyoming, 
United States, North America

Time: Maastrichtian, Cretaceous, 
68-66 million years ago

Animals: 
–Dinosaurs:
--Ankylosaurus
--Anzu
--Dakotaraptor
--Edmontosaurus
--Ornithomimus
--Pachycephalosaurus
--Thescelosaurus
--Triceratops
--Tyrannosaurus


–Turtles:
--Basilemys

–Lizards:
--Palaeosaniwa

–Crocodilians:
--Brachychampsa

–Mammals:
--Didelphodon

–Bugs:
--Cephaloleichnites

–Fish:
--Acipenser
--Cyclurus
--Lepisosteus
--Lonchidion