Elements of Geology (the earth, the rocks, the brittle and ductile deformation). The movement of the crust (earthquakes, subsidence, erosion). Geological survey techniques: geophysical methods (marine and terrestrial). Geological maps. The geological risks (floods and landslides) and resources (quarries, mines). The coasts and their defense. Safeguards of the beaches. Natural and artificial nourishment of beaches. Geological problems related to urbanization of the coast. Climate changes and the evolution of a coast. Economic Geology.