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A recumbent fold is one whose axial plane is

  • A.inclined at about 45 degrees
  • B.undefined
  • C.horizontal or nearly so
  • D.vertical or nearly so

Answer: C

Correct answer: horizontal or nearly so

In a recumbent fold the axial plane has been rotated until it lies flat, so one limb is inverted and lies upside down beneath the other. It represents the most intense compression in the sequence of fold styles, and it is characteristic of the cores of major mountain belts. Where such a fold is sheared through along its lower limb it becomes a nappe.

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