Rock unit

Mesa Rica Sandstone

5 dinosaur genera in Omnisaura with fossils from the Mesa Rica Sandstone, oldest first. See all rock units.

GrallatorHitchcock 1858
Footprints and traces237–100.5 million years ago
CaririchniumLeonardi 1984
Footprints and traces143.1–93.9 million years ago
MagnoavipesLee 1997
Footprints and traces132.6–66 million years ago
AmblydactylusSternberg 1932
Footprints and traces125.77–93.9 million years ago
HadrosauropodusLockley et al. 2003
Footprints and traces121.4–66 million years ago