Iranian Journal of Earth Sciences Microfacies, sedimentary environment and sequence stratigraphy of Asmari Formation in North Western of Charam, Kohgilooyeh and Boyer Ahmad Province, Iran Volume 16 (2024) Issue 2, April 2024 2024 08 07 Microfacies, sedimentary environment and sequence stratigraphy of Asmari Formation in North Western of Charam, Kohgilooyeh and Boyer Ahmad Province, Iran 10.57647/j.ijes.2024.1602.11 EN Behzad Saeedi Razavi Construction and Minerals Research Group, Technology and Engineering Research Center, Standard Research Institute (SRI), Karaj, Iran 0000-0001-8306-5253 Saeedeh Senemari Department of Mining, Imam Khomeini International University, Qazvin, Iran 0000-0002-2326-248X Journal Article 2024 08 07 The Asmari Formation is a thick carbonate sequence in the foreland Zagros Basin that was deposited during the Early Oligocene-Miocene. The Asmari Formation in North Western of Charam, Kohgilooyeh and Boyer Ahmad province was studied in terms of microfacies, sedimentary environment, and sequence stratigraphy. The upper boundary of the section is overlain by the Gachsaran Formation and lower boundary is overlain by the Pabdeh Formation. The studied section consists of limestone, marly limestone, shaly limestone, and intercalated of limestone, shaly and marl. Eighteen microfacies have been recognized. The study of allochemical, terrigenous, and orthochemical elements, Infers that the different sedimentary sub-environments  tidal flat, lagoon, barrier, and open marine for Asmari Formation. The Asmari Formation was deposited in on a ramp-type carbonate platform. Three complete sedimentary sequences and one incomplete sedimentary sequence were recognized.