Explain the types of depositional plains
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Depositional plains It is of five types: ... Glacial plains: These are of two types: True glacial plains: These are formed of pure glacial materials; Outwash plains: These are formed due to deposition of materials after the ablation of glaciers and ice sheets.
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Depositional plains-
The types of depositional plains include:
- Abyssal plains, flat or very gently sloping areas of the deep ocean basin. Planitia, the Latin word for plain, is used in the naming of plains on extraterrestrial objects (planets and moons), such as Hellas Planitia on Mars or Sedna Planitia on Venus.Alluvial plains, which are formed by rivers and which may be one of these overlapping types:
- Alluvial plains, formed over a long period of time by a river depositing sediment on their flood plains or beds, which become alluvial soil. The difference between a flood plain and an alluvial plain is: a flood plain represents areas experiencing flooding fairly regularly in the present or recently, whereas an alluvial plain includes areas where a flood plain is now and used to be, or areas which only experience flooding a few times a century.
- Flood plain, adjacent to a lake, river, stream, or wetland that experiences occasional or periodic flooding.
- Scroll plain, a plain through which a river meanders with a very low gradient.
- Glacial plains, formed by the movement of glaciers under the force of gravity:
- Outwash plain (also known as sandur; plural sandar), a glacial out-wash plain formed of sediments deposited by melt-water at the terminus of a glacier. Sandar consist mainly of stratified (layered and sorted) gravel and sand.
- Till plains, plain of glacial till that form when a sheet of ice becomes detached from the main body of a glacier and melts in place depositing the sediments it carries. Till plains are composed of unsorted material (till) of all sizes.
- Lacustrine plains, plains that originally formed in a lacustrine environment, that is, as the bed of a lake.
- Lava plains, formed by sheets of flowing lava.
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