It is the oldest Cretaceous geological formation that crops out in the Weald.
There is doubt about its authenticity since it was not found in situ, and cannot be conclusively associated with Cretaceous formations.
Bentonite, crude oil and natural gas are commonly produced from the various Cretaceous formations.
The Cretaceous formations of Mexico and their relations to North American geographic development.
It is found in the Cretaceous formation.
They are found in the Cretaceous formation.
Scaphites are found in the Cretaceous formation.
The breaks are partially eroded from clays of the Cretaceous formations which contain bentonite.
The surrounding area to this mountains is arid and easy to watch the Cretaceous formation of the plates and layers of the ground.
Notice of some new fossil reptiles from the Cretaceous and Tertiary formations.