#eroding__erosion__eatingaway__wearing__wearing_away__wearingaway  the mechanical process of wearing or grinding something down (as by particles washing over it)
  supertype:  geological_process  a natural process whereby geological features are modified
  subtype:  chatter_mark.eroding__chattermark  marks on a glaciated rock caused by the movement of a glacier
  subtype:  ablation  the erosive process that reduces the size of glaciers
  subtype:  corrasion__abrasion__attrition__detrition  erosion by friction
  subtype:  beach_erosion__beacherosion  the erosion of beaches
  subtype:  planation  the process of erosion whereby a level surface is produced
  subtype:  soil_erosion  the washing away of soil

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