Q.   Consider the following plains:
  1. Abyssal plain
  2. Peneplain
  3. Pediplain
  Which of the above is/are formed on ocean basin?

Answer: 1 Only
Notes: A peneplain is a low-relief non-constructional plain found on the land surface. An extensive plain formed by the coalescence of pediments is called pediplain. Pediplains are normally formed in areas of arid and semi-arid climate. An abyssal plain is an underwater plain on the deep ocean floor, usually found at depths between 3,000 metres and 6,000 metres. Abyssal plains cover more than 50% of the Earth's surface.
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