Sedimentology of pir koh formation exposed at Dholi and Rakhi Gaj, Central Sulaiman Range, Pakistan
Journal Title: Journal of Biodiversity and Environmental Sciences (JBES) - Year 2017, Vol 11, Issue 6
Abstract
Middle Eocene Pir Koh Formation is well exposed throughout the Sulaiman Range and acts as good hydrocarbon reservoir. In present research, two sections of Pir Koh Formation exposed at Dholi and Rakhi Gaj have been investigated for detailed sedimentological studies to depict the depositional environments and modeling. The formation is mainly composed of off-white to creamy white limestone and marl with black chert at places. Petrographic analyses show that Pir Koh Formation is composed of a rich assemblage of benthic and planktonic foraminifera with minor bioclasts. Four microfacies including Planktonic Wacke-Packstone microfacies, Marl microfacies, Discocyclina-Nummulities Wacke-Packstone Microfacies and Chert microfacies were framed with help of petrographic data. The microfacies analyses and paleoecology of fauna suggest a ramp model for the deposition of Pir Koh Formation and it was deposited over mid ramp to upper slope settings.
Authors and Affiliations
Saif Ur Rehman, Muhammad Ahmad Riaz, Mahboob Ahmed, Muhammad Fahad Ullah, Muhammad Kashif, Faisal Rehman
Keywords
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