Depositional Plains are formed by the deposition of materials brought by various agents of transportation like water, wind, glacier etc. They are comparatively level but rise gently towards adjacent highlands e.g. Nile Delta of Egypt, which is known for cultivation of rice and Cotton. These types of plain are further subdivided into: Alluvial, Flood, Sand Dune, Lava, Glacial and Coastal plains.
Erosional Plains are carved or formed by agents of erosion like rain, river, ice and wind, which help to smoothen out the irregularities of the earth’s surface. The Hudson Ban Lowland of North America is a good example of a Penplain while the Reg or Hamad of Sahara Desert is a good example of pediplain
Structural Plains are formed by horizontally bedded rocks, which are not disturbed by the crystal movement of the earth. They are structurally depressed areas of the world e.g. The Russian Platform, The Central Lowlands of Australia and The Great Plains of USA.