Sequence Stratigraphy of the Elika Formation at Tash Section, Eastern Alborz


Elika Formation at the Tash section (300 m in Thickness) is one of the most complete sections in the eastern Alborz basin. Petrographic studies indicate that carbonate sediments of the Tash section could be divided into several groups of microfacies which has been formed in four sub-sedimentary environments, including: Tidal flat, Lagoon, Bar and Open marine. The absence of reef and resedimented facies indicates that the carbonate platform of the Elika Formation is similar to the recent Persian Gulf shelf (Ramp). Field and laboratory studies showed that the sediments were composed of four third-order depositional sequences.