干旱区生态环境知识资源中心

The important role of lateritic and kaolinic weathering crusts as well as of products of their redeposition as climatic indicators for warm Cretaceous ages, namely, Aptian, Albian, Cenomanian, and Turonian, is shown. Schematic maps of bauxite mineral deposits with additional data on kaolinic clays, quartz sands, and iron ores are compiled on the palinspastic base. Regularities in their distribution in ancient climatic belts of paleocontinents are established, humid eases are revealed in arid landscapes of low latitudes, and the formation of an equatorial belt from these eases is shown.