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HPF-12 Environmental micropaleontology: Past, Present, future - Part 2
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Lithofacies and micribiofacies (foraminifers and radiolarians) of the Surmaq Formation in Hambast valley, Abadeh area, central Iran
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Mohammad Ali Haji Motamed Altojari, Islamic Azad University,North Tehran Branch (Islamic Republic of Iran)
Seyed Hamid Vaziri, Islamic Azad University,North Tehran Branch (Islamic Republic of Iran)
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The Surmaq Formation with a thickness of 651 m in the Hambast Valley of central Iran consists of gray, medium to thick-bedded cherty fossiliferous limestones in the lower part and alternations of bedded cherts and gray medium-bedded fossiliferous limestones in the upper parts. This formation uconformably overlies on the Vazhnan Formation in Northeast of Abadeh and is covered by the Abadeh Formation gradually. The Surmaq Formation in the studied section can be subdivided into seven informal members. The rich foraminifer fauna indicates an Yahtashian to Midian age of the formation that can be correlated with Permian foraminiferal zones including the Darvasites ordinatus Zone (Yahtashian), Pseudofusulina quasifusuliniformis Zone, Eopolydiexodina persica Zone, Afghanella schencki and Neoschwagerina occidentalis Zones (Murgabian) and Chusenella abichi Zone (Midian). three species of the Permian radiolarians include the Latentifistula sp., Ellipsoidal Radiolaria and Spherical Radiolaria were detected from cherts of the Surmaq Formation for the first time in the present study.
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