Abstract
The presence of the Sheikh Alas Formation, the Shurau Formation, and the Euphrates Formation in the area of the current study. The inference of the Sheikh Alas Formation was from Nummlite fossils and planktonic Foraminifera fossils. The Euphrates Formation was deposited in a shallow marine environment, the Sheikh Alas Formation was deposited in an environment in for reef, and the Shurau Formation was deposited in an environment Back reef. The environment of the Euphrates Formation is a shallow lagoon environment for the presence of milliolied fossils, which represent the Miocene age as evidenced by the presence of the Borlis melo melo fossil. As for the environment of the Sheikh Alas Formation, it was deposited in a marine environment in for reef due to the presence of Planktonic foraminifera fossils and the Nummlite fossil, which represents the Oligocene age, and the environment of the Shurau Formation In a shallow, lagoon marine environment Back reef, there are abundant milliolid fossils. The boundary between the Miocene formations and the Oligocene formations is characterized by an unconformable boundary composed of a layer of basal conglomerate with a thickness of 6.5 m, which is affiliated with the Euphrates Formation in terms of age.
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