Rock unit

West Melbury Marly Chalk Formation

3 dinosaur genera in Omnisaura with fossils from the West Melbury Marly Chalk Formation, oldest first. See all rock units.

MegalosaurusParkinson 1822
Bones201.4–113.2 million years ago
IguanodonMantell 1825
Bones154.8–100.5 million years ago
HylaeosaurusMantell 1833
Bones139.1–110.1 million years ago