Upper Lutetian–Priabonian carbonate and evaporite deposits (Seugdal Formation) of the Tamerza area (Southwestern Tunisia) correspond to two main facies dolomite and gypsum, recognized in bedded evaporites. The present work aimed to follow mineralogical and geochemical features of two neighbor-studied sections with the same age. The Little Cluse and the Great Cluse sections are characterized by the facies and thickness variations. All samples collected from these two bedded evaporites were investigated using XRD and XRF analyses; however, the marker levels were examined by SEM and infrared analyses. The data obtained show that the samples of Little Cluse sare mostly composed of dolomite. In contrast, the samples of the Great Cluse are composed of dolomite in the lower part and gypsum in the upper part. The correlative level marker, palygorskite overlying dolomite at the top, suggests the persistence of continental conditions featured by conglomerate level in the little Cluse. However, the dolomite of the lower part of the Great Cluse is covered by palygorskite level. It changes to gypsum deposits recognized in the lagoon environment in the upper part. The crystallization of thick gypsum succession is enhanced by subsidence activity. This idea is confirmed by the occurrence of horst and graben structures, which are the result of an extensional syn-sedimentary movement affecting upper Lutetian–Priabonian succession.

Tamerza地区（突尼斯西南部）的上Lutetian-Priabonian碳酸盐和蒸发岩沉积物（Seugdal组）对应于层状蒸发岩中的两个主要相白云岩和石膏。目前的工作旨在跟踪两个具有相同年龄的相邻研究剖面的矿物学和地球化学特征。Little Cluse 和Great Cluse 剖面的特征在于相和厚度的变化。使用 XRD 和 XRF 分析研究了从这两个层状蒸发岩中收集的所有样品；然而，通过 SEM 和红外分析检查了标志物水平。获得的数据表明，Little Cluse s 的样品主要由白云岩组成。相比之下，Great Cluse 的样品由下部的白云石和上部的石膏组成。相关电平标记，坡缕石覆盖在顶部的白云石上，表明小Cluse中以砾岩水平为特征的大陆条件的持续存在。然而，Great Cluse 下部的白云石被坡缕石层所覆盖。它变为上部泻湖环境中识别的石膏沉积物。沉降活动增强了厚石膏层序的结晶。地垒和地堑结构的出现证实了这一想法，这是影响上鲁特斯-普里阿本阶演替的伸展同沉积运动的结果。它变为上部泻湖环境中识别的石膏沉积物。沉降活动增强了厚石膏层序的结晶。地垒和地堑结构的出现证实了这一想法，这是影响上鲁特斯-普里阿本阶演替的伸展同沉积运动的结果。它变为上部泻湖环境中识别的石膏沉积物。沉降活动增强了厚石膏层序的结晶。地垒和地堑结构的出现证实了这一想法，这是影响上鲁特斯-普里阿本阶演替的伸展同沉积运动的结果。