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Overburden, in quarrying, refers to

  • A.the excess stone crushed beyond the day's requirement
  • B.the load carried by a haul truck above its rated capacity
  • C.the dust raised during drilling and blasting operations
  • D.the soil and rock lying above the deposit to be worked

Answer: D

It must be stripped and stored before extraction can begin, and the depth of it strongly affects whether a deposit is worth working. Well-run quarries keep the material for restoring the site once the stone is exhausted.

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