In this study, the Sarvak Formation in the Kuh-e Zana stratigraphic section has been investigated in terms of Cenomanian biostratigraphy, microfacies analysis, and depositional environment interpretation. The section is located in the Interior Fars zone in the Zagros Basin. The selected section of the Sarvak Formation consists of 211 m of limestone and overlies the Kazhdumi Formation conformably whereas the upper limit of the Sarvak Formation is not obvious. Based on paleontological data three biozones in the study area were established: (1) Nezzazata simplex interval zone (Early Cenomanian), (2) Chrysalidina gradata interval zone (Middle Cenomanian), (3) Cisalveolina fraasi (fallax) & Cisalveolina lehneri—Praetaberina bingistani assemblage zone (Late Cenomanian). Based on petrographic studies, eleven microfacies were identified as follows: MF1: Oligosteginid bioclast wackestone to packstone, MF2: Bioclastic wackestone–packstone, MF3: Bioclastic peloidal wackestone–packstone, MF4: Rudist floatstone, MF5: Rudist rudstone, MF6: Foraminifera intraclastic grainstone, MF7: Benthic foraminifera rudist debris packstone–grainstone, MF8: Bioclastic grainstone–packstone, MF9: Bioclastic benthic foraminiferal wackestone to packstone, MF10: Bioclastic peloidal packstone, MF11: Algal-foraminiferal wackestone–packstone. Microfacies analysis shows that the Sarvak Formation comprises three paleoenvironments as the outer ramp, middle ramp, and inner ramp (shoal and lagoon).

本研究对 Kuh-e Zana 地层剖面的 Sarvak 组进行了 Cenomanian 生物地层学、微相分析和沉积环境解释等方面的研究。该剖面位于扎格罗斯盆地的内法尔斯区。Sarvak 组选定剖面由 211 m 的石灰岩组成，与 Kazhdumi 组一致上覆，而 Sarvak 组的上限不明显。根据古生物学资料，在研究区建立了三个生物带：（1）Nezzazata simplex间隔带（早期Cenomanian），（2）Chrysalidina gradata间隔带（Middle Cenomanian），（3）Cisalveolina fraasi（fallax）& Cisalveolina lehneri-Praetaberina宾吉斯塔尼组合带（塞诺曼晚期）。根据岩相学研究，确定了 11 个微相：MF1：Oligosteginid bioclast wackestone to packstone，MF2：Bioclastic wackestone-packstone，MF3：Bioclastic peloidal wackestone-packstone，MF4：Rudist floatstone，MF5：Rudist rudstone，MF6：Foraminifera interclastic grainstone , MF7: 底栖有孔虫碎屑堆积岩-颗粒岩, MF8: 生物碎屑颗粒岩-堆积岩, MF9: 生物碎屑底栖有孔虫岩屑到堆积岩, MF10: 生物碎屑球状堆积岩, MF11: 藻-有孔虫岩屑-堆积岩。微相分析表明，萨尔瓦克组包括外斜坡、中斜坡和内斜坡（浅滩和泻湖）三个古环境。