Report of the Twenty-second Session, India, 1964, Parts 14-15

acid alumina aluminous laterite aluminous minerals Amarkantak analyses basalt bauxite bauxite deposits beds boehmite cent chemical clastic clay minerals colour composition conglomerate constituents corundum Cretaceous crust of weathering curves diaspore dolomites Elmina erosion ferruginous laterite formation Gbedjikofe Geol geological gibbsite goethite grains halloysite hematite horizon hydrated INDIA indicate iron oxides kaolinite Kumasi laterite mantle laterite profile lateritic soil latéritiques lateritisation layer leaching level laterites limestone lithomarge lower Lutawon Basin magnetite mantle rock marine material Mayarí metres mineralogical montmorillonite Nicaro nickel Nonoc ochreous Ordovician origin parent rock pebbles peneplain peridotite Phutka Pahar Pinares de Mayari pisolitic pisolitic laterite plateau Pujada quartz ratio recent laterites redeposition Reply Saltpond samples sandstones sedimentary sediments serpentinites shales silica SiO2 Siwalik surface Table temperature Tertiary texture thickness tion Trap tropical Tuya types upper Vindhyan volcanic weathered mantle zone СССР