Above the upper Diamictite of West Congolian Group, carbonate rocks of the Schisto-Calcaire Subgroup are superimposed, topped by the Bangu-Niari conglomerates and the Mpioka formations. Just as lithology varies from low to high, climates change regularly during sedimentation. By the presence of evaporites and bioherms of Collenia and Cryptozoon in the Kwilu and Lukunga formations, the Schisto-Calcaire Subgroup is characterized by a hot and arid climate developed in the Ediacaran after the glaciation of the Marinoen (635 Ma). The coarser-filled hollows than the grains of the substratum, the clast- to matrix-supported structures and the nature of its moderately misclassified clasts in large volumes of clays and silt indicate that the Bangu-Niari conglomerate has developed in a periglacial environment during the Terneuvien. The granular and repeated bedding of shales from the Lower and Upper Mpioka formations of Cambro-Ordovician age is reminiscent of the varval rhythms of periglacial lakes. These various previous elements show that after the non-longitudinal Marine Snowball, the Congo-Sao Francisco megacraton successively underwent a dry tropical climate and a temperate climate of proglacial regions.