| Weathering occurs effectively where water, air and life are in contact with rock. Such contact occurs over the surface of rocks but also along fractures. Fractures may give water, air and life deep access to the interior of rocks so weathering can also take place there. | As the rock is weathered along fractures, the products of weathering may be removed, enlarging the fractures and enhancing the process. Here, weathering has created a pattern of deep recesses in the rock. Pebbles have been washed by waves into the recesses. |