Rock unit

Aztec Sandstone

3 dinosaur genera in Omnisaura with fossils from the Aztec Sandstone, oldest first. See all rock units.

Anchisauripus(Lull 1904)
Footprints and traces247–125.77 million years ago
GrallatorHitchcock 1858
Footprints and traces237–100.5 million years ago
NavahopusBaird 1980
Footprints and traces201.4–174.7 million years ago