Erosional

[ih-roh-zhuh n] /ɪˈroʊ ʒən/

noun
1.
the act or state of ; state of being .
2.
the process by which the surface of the earth is worn away by the action of water, glaciers, winds, waves, etc.
/ɪˈrəʊʒən/
noun
1.
the wearing away of rocks and other deposits on the earth’s surface by the action of water, ice, wind, etc
2.
the act or process of eroding or the state of being eroded
n.

1540s, from Middle French erosion (16c.), from Latin erosionem (nominative erosio) “a gnawing away,” noun of action from past participle stem of erodere “gnaw away,” from ex- “away” (see ex-) + rodere “gnaw” (see rodent).

erosion e·ro·sion (ĭ-rō’zhən)
n.

erosion
(ĭ-rō’zhən)
The gradual wearing away of land surface materials, especially rocks, sediments, and soils, by the action of water, wind, or a glacier. Usually erosion also involves the transport of eroded material from one place to another, as from the top of a mountain to an adjacent valley, or from the upstream portion of a river to the downstream portion.

A type of weathering in which surface soil and rock are worn away through the action of glaciers, water, and wind.