چينه نگاري زيستي، ريز رخساره ها و محيط رسوبي سازند آسماري در شمال تاقديس مختار، شمال غرب ياسوج

Biostratigraphy, Microfacies and Depositional Environment the Asmari Formation in North of the Mokhtar Anticline. Northwest Yasuj

The Asmari Formation with a thickness of 294m located at the north of Mokhtar Anticline 15 km northwest Yasuj. This formation was studied from biostratigrarphy, microfacies and sedimentary environment point of view. Study of benthic foraminifera led to recognition of 31 genera and 20 species. Based on the distribution of foraminifera, three assemblage zones were identified. The Late Oligocene(Chattian) - Early Miocene(Aquitanian-Burdigalian) is suggested for the Asmari Formation at the study area. Based on laboratory studies, 9 microfacies related to 3 subenvironments(lagoon, bar and open marine) were identified. This study revealed that, the Asmari Formation deposited on an homoclinal epicontinental carbonate ramp.