Rock unit

Manassas Sandstone

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

GrallatorHitchcock 1858
Footprints and traces237–100.5 million years ago
GregaripusWeems 1987
Footprints and traces227.3–205.7 million years ago
KayentapusWelles 1971
Footprints and traces227.3–161.5 million years ago
PlesiornisHitchcock 1858
Footprints and traces227.3–192.9 million years ago