Rock unit

North Horn

6 dinosaur genera in Omnisaura with fossils from the North Horn, oldest first. See all rock units.

PrismatoolithusZhao and Li 1993
Eggs125.77–66 million years ago
SpheroolithusZhao 1979
Eggs121.4–66 million years ago
ContinuoolithusZelenitsky et al. 1996
Eggs100.5–66 million years ago
OvaloolithusZhao 1979
Eggs100.5–66 million years ago
AlamosaurusGilmore 1922
Bones83.6–66 million years ago
SpheruprismatoolithusBray 1999
Eggs72.2–66 million years ago