Cenozoic sediments are spread across southeast and eastern Anatolia, including the Adıyaman–Malatya regions of southeast Turkey. This study presents the first detailed petrographic, micropaleontologic, and strontium isotope analyses of the Eocene marl, clayey limestone, and limestone units that outcrop unconformably above the Mesozoic Meydan and İspendere ophiolitic rocks in the Adıyaman and Malatya regions, respectively. These carbonate rocks contain abundant planktonic foraminifera, including Turborotalia frontosa, Subbotina senni, Subbotina eocaena, Acarinina bullbrooki, Guembelitrioides nuttalli, Globigerinatheka subconglobata, and G. curryi, and benthic taxa (Nummulites, Discocyclina, and Chapmanina).Two planktonic foraminiferal zones were defined: the Turborotalia frontosa zone representing the Early–Middle Eocene (Ypresian–Lutetian/Bartonian), and the Turborotalia possagnoensis zone representing the Middle Eocene (Lutetian–Bartonian). Strontium isotope ratios (⁸⁷Sr/⁸⁶Sr) calculated for four samples ranged between 0.707663 and 0.707784, indicating an age of 45.1–51.9 million years (Ypresian–Lutetian/Bartonian). The presence of echinoid thorns in the units indicates a shallow marine environment where carbonates developed on the seaward side of a reef. For the first time in the study region and southeast Anatolia, this study has revealed the stratigraphic position of the Nummulitic limestone of the Kırkgeçit Formation unconformably overlying the ophiolites. Therefore, based on strontium isotope analyses and planktonic foraminiferal micropaleontology, the Kırkgeçit Formation is estimated as Early–Middle Eocene (Ypresian–Lutetian/Bartonian) in age.

新生代沉积物遍布安纳托利亚东南部和东部，包括土耳其东南部的阿迪亚曼-马拉蒂亚地区。这项研究提供了对始新世泥灰岩，黏土灰岩和石灰岩单元的第一个详细的岩石学，微古生物学和锶同位素分析，分别在阿迪亚曼和马拉蒂亚地区的中生代Meydan和İspendere蛇绿岩之上不整合地露头。这些碳酸盐岩含有丰富的浮游有孔虫，包括Turborotalia frontosa，Subbotina senni，Subbotina eocaena，Acarinina bullbrooki，Guembelitrioides nuttalli，Globerinatheka subconglobata和G. curryi，和底栖类群（货币虫，Discocyclina和Chapmanina）。二被定义浮游有孔虫区：Turborotalia frontosa表示早-中始新世（伊普雷斯期-卢台特期/ Bartonian）区和Turborotalia possagnoensis表示中始新世区（Lutetian–Bartonian）。锶同位素比（⁸⁷ Sr / ⁸⁶计算出的四个样本的Sr）介于0.707663和0.707784之间，表明年龄为45.1–5190万岁（伊普尔人–鲁特斯人/巴顿人）。这些单位中存在类棘突刺表明存在浅海环境，碳酸盐在礁石的海侧生长。该研究首次在研究区域和安纳托利亚东南部，揭示了Kırkgeçit组的努木岩灰岩的地层位置不一致地覆盖在蛇绿岩上。因此，根据锶同位素分析和浮游有孔虫微古生物学，估计柯尔克西特组年龄为早-中始新世（伊普尔-鲁特田/巴顿）。