Rock unit

Belly River Series

5 dinosaur genera in Omnisaura with fossils from the Belly River Series, oldest first. See all rock units.

AlbertosaurusOsborn 1905
Bones85.7–66 million years ago
CentrosaurusLambe 1905
Bones83.6–66 million years ago
DaspletosaurusRussell 1970
Bones83.6–72.2 million years ago
OrnithomimusMarsh 1890
Bones83.6–66 million years ago
ParasaurolophusParks 1922
Bones83.6–72.2 million years ago