In this contribution, two stratigraphic sections are described through the Lower Cretaceous shallow-water platform sediments (Taft formation) from the northern Tethys, which are located in the Yazd Block, Central Iran. Benthic foraminifera are used to propose a biostratigraphy for these successions. They are grouped around several assemblage zones, and several genera and species are reported from the Yazd Block basin for the first time (e.g., Arenobulimina cochleata, A. meltae, Belorusiella sp., Bolivinopsis cf. labeosa, Decussoloculina barbui, Martinotiella jucunda, Myncina bulgarica, Novalesia cornucopia, Sabaudia briacensis, Simplorbitolina manasi). Their presence can provide a better understanding for the paleogeographic reconstruction of the Tethyan seaways. Furthermore, they represent candidates as potential index fossils in the Lower Cretaceous stratigraphy of the Yazd Block. The new biostratigraphic data allow to date the Lower Cretaceous successions between the probable Valanginian and the late Aptian. Based on the absence of early Barremian indicators and also late Aptian markers, two hiatuses are recognized through the Taft formation. This formation also displays a diachrony in ages at its base and top, which suggests the effect of long-term subsidence in the Yazd Block during the Early Cretaceous, following the Cimmerian phase of orogeny.

在这一贡献中，通过位于伊朗中部亚兹德地区的特提斯北部的下白垩统浅水平台沉积物（塔夫脱岩层）描述了两个地层剖面。底栖有孔虫被用来为这些演替提出生物地层学。他们周围的几个组合带分组，和几个属和种来自亚兹德盆地区块的第一时间（例如，报道Arenobulimina cochleata，一。  meltae，Belorusiella属，Bolivinopsis参见labeosa，Decussoloculina barbui，Martinotiella jucunda，Myncina 保加利亚新星 聚宝盆，Sabaudia briacensis， Simplorbitolina manasi）。它们的存在可以为特提斯海道的古地理重建提供更好的理解。此外，它们代表了亚兹德区块下白垩统地层中潜在的索引化石。新的生物地层学数据可以确定迄今为止在可能的瓦朗吉尼纪和晚期阿普提安之间的下白垩纪演替。由于缺乏早期的巴雷米亚指标和晚期的Aptian指标，因此通过塔夫脱构造可以识别出两种裂隙。这种构造在其底部和顶部也显示出年龄的历时性，这表明在造山运动的西美尔期之后，在白垩纪早期的亚兹德区块长期沉降的影响。