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  • (environment) Wearing or grinding down of a substance by friction. Dust from such processes contributes to air pollution.
    Source: Terms of the Environment
  • (geology)
  1. The act of wearing and smoothing of rock surfaces by the passage of water charged with sand and gravel, by the passage of sand drifts, the descent of glaciers, etc. AGI
  2. The wear and tear that rock particles in transit undergo through mutual rubbing, grinding, knocking, scraping, and bumping, with resulting comminution in size. CF: abrasion
    Source: Dictionary of Mining, Mineral, and Related Terms

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