Rock unit

Twin Mountains

5 dinosaur genera in Omnisaura with fossils from the Twin Mountains, oldest first. See all rock units.

BrontopodusFarlow et al. 1989
Footprints and traces174.7–85.7 million years ago
AcrocanthosaurusStovall and Langston 1950
Bones121.4–93.9 million years ago
SauroposeidonWedel et al. 2000
Bones121.4–93.9 million years ago
TenontosaurusOstrom 1970
Bones121.4–93.9 million years ago
ConvolosaurusAndrzejewski et al. 2019
Bones119.57–113.2 million years ago