It is Callovian
and Oxfordian in age and reaches a thickness of more than 300 feet in the basinal area between the Ghawar and Khurais Fields.
He added that during the Middle Callovian
165 million years ago, much of Europe was covered by a shallow sea, creating a chain of large to small islands.
The LGA-1D tested a three-way dip elongated faulted closure in two Dogger limestone formations - the Callovian
and the Bathonian.
Behavior of organic matter from Callovian
shales during low-temperature air oxidation // Ibid.
and Oxfordian deposits of the south-eastern Caucasus seem to be missing.