Weathering p. pr. & vb. n. : of Weather

Weathering n. : The action of the elements on a rock in altering its color, texture, or composition, or in rounding off its edges.

Example:


Taxonomy
rocks, weathering, chemical weathering, soil, joints, ice, minerals, Salt, physical weathering, Pressure release, carbonic acid, limestone, reaction, weathering processes, rock surface, salt weathering, Carbonation, calcium carbonate.

Defination from the web:
Weathering is the decomposition of Earth's rocks, soils and minerals through direct contact with the planet's atmosphere. ... This process can also be called frost shattering, frost-wedging or freeze-thaw weathering. ...