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A nonconformity is an unconformity in which sedimentary beds rest upon

  • A.igneous or metamorphic rock
  • B.sedimentary rock of the same dip
  • C.sedimentary rock of a different dip
  • D.a fault plane

Answer: A

Correct answer: igneous or metamorphic rock

In a nonconformity the sediments rest directly on crystalline basement. Since the igneous or metamorphic rock formed at depth, the surface implies uplift and the removal of everything that once lay above - usually kilometres of it - before the sediments were laid down.

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