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  1. Erosion of rock material by friction of solid particles moved by gravity, water, ice, or wind.
    Source: Leet, L. Don. 1982. Physical Geology, 6th Edition. Englewood Cliffs, NJ: Prentice-Hall
  2. The mechanical wearing away of rock surfaces by friction and impact of rock particles transported by wind, ice, waves, running water, or gravity. Syn: corrasion
  3. The wearing away of diamonds, drill-bit matrices, and drill-stem equipment by frictional contact with the rock material penetrated or by contact with the cuttings produced by the action of the drill bit in drilling a borehole. Long
    Source: Dictionary of Mining, Mineral, and Related Terms

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