M Nouredini; M Yazdi; A Ashouri; S Rahmati
Abstract
The Lower Carboniferous deposits (Shishtu II Formation) is exposed in the Banarizeh section, Southeastern Isfahan, Central Iran. The Shishtu II Formation is characterized by continental to shallow marine deposits, where it unconformably overlies the Alluvial deposits and is unconformably overlain by ...
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The Lower Carboniferous deposits (Shishtu II Formation) is exposed in the Banarizeh section, Southeastern Isfahan, Central Iran. The Shishtu II Formation is characterized by continental to shallow marine deposits, where it unconformably overlies the Alluvial deposits and is unconformably overlain by the Sardar Formation. The thickness of Shishtu II Formation reach to 195m and contain moderate diversity, high richness Holothurian sclerites assemblages and other skeletal particles of scatter Crinoids, Brachiopods and Corals. The systematic studies and taxonomic investigation carried out on the collected samples from studies area led to recognition of 8 species belonging mainly to 4 families (Calclamnidae, Achistridae, Palaeocaudinidae, Theelidae). The Holothurian sclerites in Shishtu II Formation are dominantly as: Eocaudina subhexagona, Eocaudina ovalis, Microantyx permiana, Mercedescaudina langeri, Protocaudina hexagonaria, Achistrum monochordata, Thalattocanthus Consonus. Based on sratigraphical distribution of the Holothurian sclerites, Tournaisian- Visean age is suggested for Shishtu II Formation.
M. Nouradiny; S. Rahmati; M. Yazdi
Abstract
The studied sections are located in southwestern of central Iran. Main lithology of these sections are including shale, sandstone and limestone. Four biozones had been recognized base on Conodont. That contain Idiognathodus delicates Zone, Streptognathodus oppletus Zone, Sweetognathus whitei Zone. And ...
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The studied sections are located in southwestern of central Iran. Main lithology of these sections are including shale, sandstone and limestone. Four biozones had been recognized base on Conodont. That contain Idiognathodus delicates Zone, Streptognathodus oppletus Zone, Sweetognathus whitei Zone. And Neostreptognathodus pequopensis Zone. Based on recognized conodont, the age reveal for Sardar Formation is Bashkirian- early Gzhelian and the Permian deposits are Artinskian (khan formation age equivalent). In this sections Carboniferous- Permian boundary has been seen paraconformity. Comparison this area with neighborhood showed after Kasimovian we have upward and erosion in these areas and with started melting due to glacial epoch in lower Permian so these areas covered with water although we have shallow basin comparable with another areas in Central Iran.