rock armour groyne enlarging sandy beach sediment trap for longshore drift along coast. spain

underwater sea blue green ocean water wave reflection reef fish azure sunlight coral leaf invertebrate rock armour groyne enlarging sandy beach sediment trap longshore drift coast cala del moral malaga spain salou pineda cliffs coastal coastline costa sol deposition erosion erosional europe european feature features landform landforms limestone longshore-drift marine mediterranean movement process processes rocks rocky shore sand cliff shoreline spanish transportation travel waves