It seems that the air in Cretaceous times was 32 percent oxygen, half as much again as air today.
To the east, the stable Florida platform was not covered by the sea until the latest Jurassic or the beginning of Cretaceous time.
Stagnation of deep sea currents in middle Cretaceous times caused anoxic conditions in the sea water.
No radiometric dates are available for the seamount, but it may of Early Cretaceous time.
It was formed in Late Jurassic to Early Cretaceous times (160-120 Ma).
Early Cretaceous time brought continental deposition that was dominated by rivers to the area.
Certainly at about the beginning of late Cretaceous times we have one of the best documented transgressions of all time.
In the Cretaceous time, much of England was under the sea.
These extensional faults were themselves reactivated during further rifting in Jurassic to early Cretaceous times.
Most fossils known from Early Cretaceous times were of marine invertebrates.
