Aptian–Albian palaeoenvironments explored in four sections on the Constantine platform, NE Algeria, are identified based on lithology, sedimentary structures, fossil content and microfacies. A mixed unattached carbonate platform is characterised by lagoonal–reefal facies during the Aptian and clastic–carbonate hemipelagic facies during the Albian. The vertical microfacies trend shows a large-scale deepening, locally interrupted by shallowing-upward sequences, especially during the Lower Aptian. Magnetic susceptibility oscillations recorded in the studied sections reflect several factors which influenced the magnetic signal including platform morphology, sedimentary discontinuities, detrital input and sedimentary condensation events. Three major depositional sequences are distinguished and overall indicate a deepening-up trend that generally coincides with the long-term sea-level rise recorded in Cretaceous strata at this time. The correlations between the studied sections demonstrate uplift of the platform and tilting from north to the south during at least the later part of the upper Aptian. Lithostratigraphic correlations and palaeontological assemblages across the Constantinois platform show that the structural units already mapped as overlapping bodies correspond to Albian strata.

根据岩性、沉积结构、化石含量和微相，确定了阿尔及利亚东北部君士坦丁台地四个部分的阿普第-阿尔布古环境。混合独立碳酸盐岩台地的特征是阿普阶期的泻湖-礁岩相和阿尔布阶期的碎屑-碳酸盐岩半远洋相。垂直微相趋势显示出大规模加深，局部被浅层向上层序打断，特别是在下阿普第阶期间。研究剖面中记录的磁化率振荡反映了影响磁信号的几个因素，包括平台形态、沉积不连续性、碎屑输入和沉积凝结事件。区分了三个主要的沉积层序，总体上显示出加深的趋势，与此时白垩纪地层记录的长期海平面上升相一致。研究剖面之间的相关性表明，至少在上阿普第阶后期，台地隆起并从北向南倾斜。康斯坦丁台地的岩石地层对比和古生物组合表明，已绘制为重叠体的结构单元对应于阿尔比亚地层。