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A joint is a fracture along which there has been

  • A.no appreciable displacement
  • B.displacement of several metres
  • C.displacement only in the vertical sense
  • D.movement accompanied by mineral growth

Answer: A

Correct answer: no appreciable displacement

A joint is a fracture across which the rock has parted without the two sides sliding relative to each other. It may be open, closed or mineral-filled, and mineral growth in it does not make it a fault; only displacement does. Joints matter engineering because they divide the rock mass into blocks and provide the paths along which water flows and failure occurs.

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