Greater Persian Gulf Permian-Triassic stratigraphic nomenclature requires study

Click here to enlarge imageCarbonates of the Dalan and Khuff formations, which are essentially of Permian age, form extensive gas reservoirs in the Greater Persian Gulf area (Iran, Iraq, Saudi Arabia, and the eastern portion of the Arabian Peninsula, Fig. 1). These sediments were deposited unconformably on Lower Paleozoic rocks in western Iran and on basement rocks in Oman, Yemen, and Arabia. The term "Khuff formation" has been widely used by oil companies in this region, and its equivalent (the Dalan formation) is a rather new name which is currently used in Iran.However, as with many other litho- stratigraphic units in the Middle East, poor correlations and confusing nomenclature are ...

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