The term refers to a flat surface of wide extension .
At this point it is interesting to know its etymological origin. We have to explain in this sense that it derives from Latin, specifically from the word "planities." Specifically, this is the sum of "planus", which can be translated as "flat", and the suffix "-ities", which is used to indicate quality.
A plain, therefore, is a plain . It is a terrain that lacks undulations or has minor elevations.
Plains usually appear in lowlands, in valleys or on plateaus . Many times they are delimited by cliffs or mountains.
Other words that can function as synonyms for plain are plateau, moor, plain or plane.
Regarding the formation of a plain, it can be due to different factors. Erosion caused by wind and fluids released from various prominences are among the most common causes.
Due to their characteristics, plains tend to have great relevance for the economy . Although it depends on its geographical location and its geological characteristics, it is common for plains to be appropriate for the development of agriculture .
The crops in the plains, in this way, constitute the sustenance of millions of human beings. Because they do not have significant undulations, the plains allow the use of machinery and the mechanization of numerous activities, such as harvesting .
In the same way, we cannot forget that in Peru there is what is known as the Great Plain. This is a plain located in the area of the province of Maynas, next to rivers such as Nanay or the Amazon.
This plain, which is of alluvial type, has its origin in the Upper Tertiary Quaternary and presents as its main setback the fact that it can be a victim of major floods.
In addition to everything indicated, we cannot ignore that there is what is known as the coastal or coastal plain. This, as its name makes clear, is located next to the sea and there is the possibility that it even extends under the sea, giving shape to what is called the continental shelf.
Among the best-known plains or coastal plains we can highlight those in Chile or the United States. This without overlooking that in Spain there are several of significant importance, such as the case of the Valencian coastal plain, which is the most important in the Mediterranean.
In Chile , the idea of coastal plain refers to one of the main relief structures. The coastal plains develop between the northern limit of the nation and the Chacao channel , and between the Coastal mountain range and the Chilean Sea .
A floodplain , on the other hand, is a flat region located next to a lake , stream , or river . This causes the area to flood periodically or occasionally.