Rock unit

Laramie Formation

8 dinosaur genera in Omnisaura with fossils from the Laramie Formation, oldest first. See all rock units.

ThecodontosaurusRiley and Stutchbury 1836
Bones247–192.9 million years ago
HadrosauropodusLockley et al. 2003
Footprints and traces121.4–66 million years ago
DromaeosaurusMatthew and Brown 1922
Bones110.1–66 million years ago
EdmontosaurusLambe 1917
Bones89.8–66 million years ago
OrnithomimusMarsh 1890
Bones83.6–66 million years ago
SaurexallopusHarris 1997
Footprints and traces83.6–66 million years ago
ThescelosaurusGilmore 1913
Bones83.6–66 million years ago
TriceratopsMarsh 1889
Bones83.6–66 million years ago