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An overturned fold is one in which

  • A.the fold axis is horizontal
  • B.both limbs dip in the same direction
  • C.both limbs dip away from one another
  • D.the axial plane is vertical

Answer: B

Compression has pushed the fold over so far that one limb has rotated past the vertical, leaving both limbs inclined the same way. One limb is then inverted, so superposition no longer gives the true order of the beds.

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