Introduction of microfacies and sedimentary environment the end of middle Permian deposits and Guadalupian-Lopingian boundary in the west of Tethys, Abadeh area, Iran

In Iran, the Permian-Triassic sediments are located in the northeastern part of Hambast Mountain, 60 km south-east of Abadeh city. One of the unique features of these sediments is the existence of complete outcrops from the middle Permian to the Upper Permian, which makes it possible to fully investigate the incidents at the end of middle Permian. The study area includes two stratigraphic sections in the Hambast valley, including Unit 3 of Surmag Formation (Capitanian) ,Abadeh Formation (Capitanian) , including Unit 4a, Unit 4b and Unit 5, and the Primary part of the Hambast Formation (Wuchiapingian) . Based on studies done on 380 microscopic thin sections, 10 sedimentary microfacies include Bioclastic Sponng Spicule Wackestone , Bioclastic Staffelid Packstone , Hemigordiopside Wackestone , Bioclastic Wackestone / Packstone , Algal Wackestone , Ostracod Wackestone , Fenestral Bioclastic Wackeston , Stromatolite Wackestone , Dolostone , Mudstone , were identified. These microfacies are related to unlimited lagoon and tidal zone that have been deposited in a platform of homoclinal ramp type.