The grain size and the exoscopic analyzes of the late Pleistocene deposits (MIS 5) of the Bizerte Coast (N-E of Tunisia) are indispensable tools for sedimentological analyzes providing a wealth of information on the intrinsic properties of the sediments and their depositional environment. The grain size studies are carried out through statistical parameters, diagram of Passega “CM” and bivariate scatter graphs. The mean size ranging from 0.91 to 1.91 mm, indicative of fine to medium-grained sand. Most of them are well-sorted, showing a spread of 0.098–049 mm. Based on the CM pattern, the analyzed samples fall in rolling and bottom suspension. The Scanning Electron Microscope “SEM” observations reveal an important microtexture development formed by mechanical and chemical processes. Their examination suggests a complex sedimentary history beginning with a violent eolinisation, a residence in the infratidal horizon then a passage towards an intertidal or fluviatile horizon ending with a possible wind recovery.

比塞大海岸（突尼斯东北部）晚更新世沉积物 (MIS 5) 的粒度和外镜分析是沉积学分析必不可少的工具，提供了关于沉积物的内在特性及其沉积环境的丰富信息。晶粒尺寸研究通过统计参数、Passega“ CM ”图进行”和二元散点图。平均粒度为 0.91 至 1.91 毫米，表示细粒至中粒砂。它们中的大多数都很好地分类，显示出 0.098-049 毫米的扩展。根据 CM 模式，分析的样品处于滚动和底部悬浮状态。扫描电子显微镜“SEM”观察揭示了由机械和化学过程形成的重要微观结构发展。他们的检查表明，一个复杂的沉积历史开始于剧烈的白化作用，在潮下层中停留，然后是一条通往潮间带或河流层的通道，以可能的风恢复结束。