Sandar consist mainly of stratified (layered and sorted) gravel and sand. 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.Glacial plains, formed by the movement of glaciers under the force of gravity:. ![]() Scroll plain, a plain through which a river meanders with a very low gradient.Flood plain, adjacent to a lake, river, stream, or wetland that experiences occasional or periodic flooding.Plains in many areas are important for agriculture because where the soils were deposited as sediments they may be deep and fertile, and the flatness facilitates mechanization of crop production or because they support grasslands which provide good grazing for livestock. In a few instances, deserts and rainforests may also be considered plains. Plains can be formed from flowing lava from deposition of sediment by water, ice, or wind or formed by erosion by the agents from hills or mountains.īiomes on plains include grassland ( temperate or subtropical), steppe ( semi-arid), savannah ( tropical) or tundra ( polar). Coastal plains mostly rise from sea level until they run into elevated features such as mountains or plateaus. Where a geological region contains more than one plain, they may be connected by a pass (sometimes termed a gap). In a valley, a plain is enclosed on two sides, but in other cases a plain may be delineated by a complete or partial ring of hills, by mountains, or by cliffs. ![]() Plains are one of the major landforms on earth, where they are present on all continents, and cover more than one-third of the world's land area. Plains occur as lowlands along valleys or at the base of mountains, as coastal plains, and as plateaus or uplands. Description Ī plain or flatland is a flat expanse of land with a layer of grass that generally does not change much in elevation, and is primarily treeless. Montane plains as seen in Horton Plains in Sri Lanka.
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