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The term panplane refers to

  • A.A level surface formed in the old age of fluvial cycle
  • B.A level surface formed by wind erosion
  • C.A plain formed by marine action
  • D.A plain formed by joining of flood-plains

Answer: D

A panplain is a plain formed by the joining of adjacent flood plains, as the meandering rivers widen their valleys and the flood plains of neighbouring streams merge. The term was introduced by Crickmay in 1933 and used in the Davisian cycle of erosion.

A peneplain, in contrast, is a level surface formed in the old age of the fluvial cycle (option A), and a level surface formed by wind erosion is a pediplain or desert plain. A plain formed by marine action is a plain of marine abrasion or deposition. So panplain is option D.

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