CLAY MINERALS AND WEATHERING: Clay minerals -- Clay formation through weathering -- Deserts, glaciers, rivers -- Lacustrine clay sedimentation -- FROM LAND TO SEA: Estuaries and deltas -- Clay sorting and settling in the ocean -- Aeolian input -- Terrigenous supply in the ocean -- CLAY GENESIS IN THE SEA: Alkaline, evaporative environment -- Ferriferous clay granules and facies -- Organic environment -- Metalliferous clay in deep sea -- Hydrothermal environment -- CLAY DIAGENESIS: Early processes -- Depth of burial -- Tectonic, lithologic and hydrothermal constraints -- CLAY STRATIGRAPHY AND PALEOENVIRONMENT: Paleoclimate expression -- Paleocirculation and tectonics -- Paleoenvironmental reconstruction -- Clay and geodynamics.