Physical Weathering: Frost wedging, Plant roots breaking apart rocks, Water rounding out rough rocks, Glaciers breaking down rocks, Wind wearing away rocks, Animals digging a burrow, , , , Chemical Weathering: Rusting, Acid rain breaking down rocks, Oxidation, Carbonic acid carving out caves, , ,

Tauler de classificació

Estil visual

Opcions

Canvia de fonament

Restaurar desada automàtica: ?