Abstract Detailed mapping and prospecting drilling for bauxites in the territory of the Fouta-Djallon Plateau and Mandingo Mountains and the compilation on the succession, lithology, facies, and age of the Mesozoic–Cenozoic deposits of the marginal zone of the Senegal–Guinea Perioceanic Depression have allowed us to correlate and essentially update the scheme of the geomorphologic evolution of the territory of West Africa and to produce the map of planation surfaces. It has been demonstrated for the first time that the base level inverted in the Middle Miocene, and its emergence was responsible for paleogeographic changes and related regional (not local) accumulation of alluvial and lacustrine sediments of the Sangaredi Group, with the subsequent formation of high-grade bauxites with a high content of boehmite. These bauxites were used for the first time as an age indicator in mapping the Middle–Late Miocene stepwise planation surface.

中文翻译：

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对西非救济地貌演变的新见解

摘要 Fouta-Djallon 高原和曼丁哥山脉境内铝土矿详细测绘和找矿钻探及塞内加尔-几内亚大洋坳陷边缘带中新生代矿床的演替、岩性、相和年龄汇编使我们能够关联并从根本上更新西非领土的地貌演变方案，并制作出平坦表面的地图。首次证明中中新世底面倒转，它的出现是造成 Sangaredi 群冲积和湖相沉积物的古地理变化和相关区域（非局部）堆积，随后形成高具有高勃姆石含量的级铝土矿。