The group of processes whereby earthy or rocky material is worn away by natural sources such as wind, water or ice and removed from any part of the earth's surface.
(earthy or rocky material; is worn away; by natural sources such as wind, water or ice) (earthy or rocky material; removed; from any part of the earth's surface)
earthy or rocky material earthy or rocky material
is worn away removed
by natural sources such as wind, water or ice
from any part of the earth's surface