Rock unit

Navajo-Nugget Sandstone

2 dinosaur genera in Omnisaura with fossils from the Navajo-Nugget Sandstone, oldest first. See all rock units.

GrallatorHitchcock 1858
Footprints and traces237–100.5 million years ago
OtozoumHitchcock 1847
Footprints and traces237–174.7 million years ago