A detailed stratigraphic analysis was carried out on Valanginian deposits of six Moroccan sections of the Essaouira-Agadir Basin (EAB, South Tethyan margin) in order to characterize the Weissert Event and propose correlations with the North Tethyan margin (south–east France Basin). The studied successions consist of alternating marlstone and limestone beds with sandy intercalations, and are well exposed and relatively rich in ammonites. Ammonite biostratigraphy and sequence stratigraphy were established for all successions, whereas calcareous nannofossil and carbon stable isotope analyses were performed for two and five sections, respectively. For each succession, an accurate ammonite zonal scheme allows to recognize the standard zonation established for the Mediterranean Province. A calcareous nannofossil zonation is provided for Zalidou and Aït Hamouch, considered as reference sections. The detailed biozonations allowed to ascribe an accurate age for most of the sedimentary discontinuities and depositional sequences identified in the EAB. East–west and north–south transects are established for the Valanginian depositional system. Despite some stratigraphic gaps, the Valanginian carbon isotope excursion (CIE) was recognized in most of the studied sections. The Moroccan successions are correlated with those of reference sections of south–east France i.e., the Vocontian Basin (Vergol-La Charce) and Provence Platform (Carajuan), using bio-sequence-chemo-stratigraphy. These inter-basin correlations allowed to evidence major “mid-Valanginian” and upper Valanginian eustatic regressions; the possible role of tectonics and glacio-eustacy is also discussed.

对 Essaouira-Agadir 盆地（EAB，南特提斯边缘）的六个摩洛哥部分的 Valanginian 矿床进行了详细的地层分析，以描述 Weissert 事件并提出与北特提斯边缘（法国东南部盆地）的相关性。所研究的层序由交替的泥灰岩和石灰岩层组成，夹层砂质，出露良好，菊石含量相对丰富。建立了所有层系的菊石生物地层学和层序地层学，而分别对两个和五个剖面进行了钙质超微化石和碳稳定同位素分析。对于每个演替，准确的菊石分区方案允许识别为地中海省建立的标准分区。为 Zalidou 和 Aït Hamouch 提供了钙质纳米化石分区，被视为参考部分。详细的生物分区允许为 EAB 中确定的大多数沉积不连续性和沉积序列确定准确的年龄。Valanginian沉积体系建立了东西向和南北向样带。尽管存在一些地层差距，但在大多数研究剖面中都发现了 Valanginian 碳同位素偏移 (CIE)。摩洛哥层序与法国东南部的参考剖面，即 Vocontian 盆地 (Vergol-La Charce) 和普罗旺斯地台 (Carajuan) 相关，使用生物序列化学地层学。这些流域间的相关性可以证明主要的“中瓦朗吉尼期”和上瓦朗吉尼期的海浪回归；