1. FLAKES OF BRICK - ?? MECHANICAL OR CHEMICAL.. DESCRIPTION OF LOCATION IS??
2. CRACKS IN ROCKS - ?? MECHANICAL OR CHEMICAL.. DESCRIPTION OF LOCATION IS??
3. LICHEN GROWING ON ROCKS - ?? MECHANICAL OR CHEMICAL.. DECRIPTION OF LOCATION IS??
4. ROOTS OR PLANT GROWTH MAKING CRACKS IN CONCRETE - ?? MECHANICAL OR CHEMICAL.. DESCRIPTION OF LOCATION??
5. WORN AWAY STATUES - ?? MECHANICAL OR CHEMICAL.. DESCRIPTION OF LOCATION??
6. EXPOSED ROCKS - ?? MECHANICAL OR CHEMICAL.. DESCRIPTION OF LOCATION??
7. RUST ON ROCKS - ?? MECHANICAL OR CHEMICAL.. DESCRIPTION OF LOCATION??
8. WATER - ?? MECHANICAL OR CHEMICAL.. DESCRIPTION OF LOCATION??