Tuesday, April 09, 2013

What is the meaning of Plain? Concept, Definition of Plain

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Definition of plain



1 Meaning of plain

A plain is a field or land without high or low. It is, therefore, a long surface characterized by equality.
Referred to as plain or plain flat geographic area or whose ripple is less than the 150 meters above the sea level. If you submit to a higher elevation, it would result in a plateau.
The Plains account for about 55% of the land surface. Anyway, they also appear on the ocean floor as abyssal plain or platform. In the case of the plains of the Earth's surface, its origin comes from the ancient rocks that were part of the stable interior of the continents. The plains are the result of millions of years of erosion.
There are different types of plains, such as the pedillanuras, the peneplains, corrosion Plains, the panllanuras, the coastal platforms and crioaplanamiento surfaces.
The pedillanuras are surfaces that arise from the retreat of escarpments and the pedimentacion (the formation of concave platforms with gentler slopes at foot of steep slopes). The peneplains, on the other hand, are surfaces that have almost no topographic accidents.
The plains of corrosion are derived from other Plains already pre-existing, emerging after the dismantling of the eroded material and chemical weathering processes. The panllanuras cover the planar surfaces that appear as a result of the union of floodplains, while coastal platforms are created by the erosive action of waves.
By recent, crioplanacion surfaces are developed with the deposition of the material meteorizado in depressions.

2. Definition of plain

It is known from plain to the territorial and geographical space which does not present any kind of relief or alteration to what sea level is considered. In this sense, easily the plain differs from other fields as the plateau, mountain or even depression since all of them have a greater or lesser height from the sea level. The plain is, by this same feature, one of the most convenient spaces for culture and is for this reason that geographically they tend to be more inhabited areas.
The plain is a vast territory, and as says it its name, level, i.e., without reliefs, depressions or elevations that desnivelen. This is why it is mainly used for activities such as agriculture and grazing and livestock since it is much more accessible than other regions or areas where there are greater presence of rocks, slopes, etc.
Although man has managed to adapt to different types of soil, the reality is plain remains always a favorite for comfort and in some cases adds also the fact that the lands are extremely fertile, without the presence of rocks and wet soils.
The formation of the Plains may depend on several factors. In large part, the plains are land worked by the erosion of various natural elements such as water or wind over millions of years, which has made the ground to lose height. In other cases, the plains are formed from sediments that can go leaving the beds of rivers or even particles that leaves the wind or different air currents. Obviously, these transformations are invisible in terms of human but meaningful time with respect to the time of the Earth. When we speak of Plains created by sediments we should point out that the type of sediment left by water, for example, will determine the type of soil fertility since some particles are more humid and even sediments transported by the water tend to be more beneficial than the transported by the wind.

3 Concept of plain

The plain word refers to a flat relief, that also can be called plain. The elevation of the land in the Plains does not exceed two hundred meters above the sea level; and they are of recent origin, since they belong to the period Quaternary or antropozoico. Extend in large proportions in the lowlands of the continents, in the basins of major rivers, with little deep valleys. These areas are used for farming, because they are formed by sediments, very fertile in general, for being rich in nutrients; They are also used for the construction, to build roads, etc. Its sediments, in many cases, as in the Gulf of Mexico, are oil-rich soils. Height of two hundred meters above the relief is called plateau.
On the American continent are the Amazon plain, that of the Orinoco, the Mississippi and the chaco-pampean, occupying much of the central part of the continent. South America dominated by erosion or alluvial plains (formed by the accumulation of materials transported by the waters of a river) and river. The Asian Plains are known with the name of steppes, originate in mountains and are found in latitudes high, going to the Arctic Ocean. There are few areas of plain in the African continent. In Europe the Plains were formed by the withdrawal of the glaciers.
The climate of the Plains is variable, depending on whether your latitude is high or low. There are Plains temperate with hot summers and winters cold and tropical with dry and rainy season.

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