1) Affected by wind or water 2) Ate away 3) Ate away at 4) Ate into 5) Became a gully 6) Became weatherworn 7) Became worn away 8) Broke the bank 9) Carved a canyon 10) Chipped away at 11) Crumbled 12) Crumbled gradually 13) Destroyed by degrees 14) Destroyed slowly 15) Disintegrated 16) Eaten away 1) Ate 2) Ate away 3) Eaten 4) Rutted 5) Scoured 6) Wore 7) Worn 
• (imp. & p. p.) of Erode • (p. p. & a.) Having the edge worn away so as to be jagged or irregularly toothed. • (p. p. & a.) Eaten away; gnawed; irregular, as if eaten or worn away.
Erosion is the group of natural processes, including weathering, dissolution, abrasion, corrosion, and transportation, by which material is worn away from the archaeological remains.
Having gone through the process of erosion.
E·rod'ed past participle & adjective 1. Eaten away; gnawed; irregular, as if eaten or worn away. 2. (Botany) Having the edge worn away so as to be jagged or irregularly toothed. 
[adj] - worn away as by water or ice or wind
scoured adjective worn away as by water or ice or wind