In the present paper, sequence stratigraphy and microfacies of the Dariyan Formation in the two sections of the Gadvan and Zana Mountains located were studied in NE and NW of Shiraz (Fars province, SW Iran). An area of 429.5 m of the Dariyan Formation sediments was studied through 187 thin sections. Also, the index microfacies were closely identified. Generally, index microfacies of the studied thin section were mudstone, wackestone, packstone, and grainstone microfacies. Received paleontological data confirm Aptian–lower Albian age of the Dariyan Formation. According to the lithostratigraphic aspect, the lower contact of Dariyan Formation with the Gadvan Formation in the Gadvan Mountain was described as a gradual type and in Zana Mountain; disconformity was found due to the sign of water withdrawal. Given the upper contact of the Dariyan Formation concerning the formation percentage, contact disconformity was observed due to the changes in the Allochem element and the situation of the entity from water and also according to the high percentage of iron nodules and Gluconate. According to the sequence, stratigraphic studies in the section of Gadvan Mountain, the lower border of the Dariyan Formation with Gadvan Formation was in the gradual form [type 2 Sequence Boundary (SB2)] and there was a disconformity in the upper border of this formation with Kazhdumi Formation [type 1 Sequence Boundary (SB1)]. Dariyan Formation included the system tracts (transgressive system tract, early highstand system tract, and late highstand system tract). There was a disconformity in its lower of the Gadvan Formation and disconformity in its upper boundary with the lower of the part Kazhdumi Formation (SB1) and it included the system tracts (highstand system tract, transgressive system tract, and lowstand system tract). Overall, lap sequence grade3 was seen in the two sections.

中文翻译：

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伊朗西南扎格罗斯盆地设拉子东北和西北部Gadvan和Zana剖面Dariyan组层序地层研究

在本文中，研究了位于设拉子东北部和西北部（伊朗西南法尔斯省）Gadvan 和 Zana 山脉两段 Dariyan 组的层序地层和微相。通过 187 个薄片对 429.5 m 的 Dariyan 组沉积物进行了研究。此外，还密切识别了指标微相。总体而言，所研究薄片的指标微相为泥岩、碎屑岩、泥灰岩和颗粒岩微相。收到的古生物学数据证实了 Dariyan 组的 Aptian-lower Albian 时代。从岩石地层学来看，加德文山下达日延组与加德文组的下部接触描述为渐进式，在扎那山；发现不合格是由于有抽水迹象。考虑到 Dariyan 组上层接触的形成百分比，由于 Allochem 元素的变化和实体从水中的情况以及铁结核和葡萄糖酸盐的高百分比，观察到接触不整合。根据Gadvan山段层序、地层研究，Dariyan组与Gadvan组下缘呈渐变形态[2型层序边界(SB2)]，该组上缘存在不整合与 Kazhdumi 组 [类型 1 层序边界 (SB1)]。大日岩组包括体系域（海进体系域、早期高位体系域、晚期高位体系域）。Gadvan组下部不整合，上界与Kazhdumi组下部（SB1）不整合，包括体系域（高水位体系域、海进体系域和低位体系域）。总体而言，在两个部分中看到了圈数等级 3。