This study concerned the cuttings of two boreholes on the west margin of Abidjan. The cuttings were subjected to a chemostratigraphic analysis in order to have a clear knowledge of the composition and distribution of the chemical elements of sediments with particles less than 63µm from the Albian. It was a question of determining the different proportions of major elements and trace elements by the method of the X-Ray Fluorescence (XRF). The purpose is to define the minerals likely to be found in the sediments. Thus, it turns out that these sediments are both rich in heavy minerals and in clay minerals. These minerals could be illite, chlorite, kaolinite, potassium feldspars, mica, zircon, titanium, ritule, anatase linked to variable levels of K, Rb, Zr, Ti, Al, Ga and Mg. the variation in the elements shows the presence of two sources, provenance of sediment. The first source is rich in heavy elements and the second in potassium and magnesium. The characteristics of these sediments show the presence of a transgression phenomenon on the passage from sequence 1 to sequence 2.