From Latin vallis, a Valley is a plain between mountains or heights. It is a depression of the earth's surface between two slopes , with an inclined and elongated shape. The waters of a river can circulate along the slope of a valley (in the case of river valleys ) or lodge the ice of a glacier (glacial valleys ).
A valley can be formed for different reasons, such as erosion It generates a watercourse or tectonic movements. Similarly, it can have different forms according to its origin and age.
The youngest valleys are shaped like V , Since the slopes They are poorly modeled by erosion. When erosion progresses, talk about alluvial valleys , which have a broad and flat bottom. The valleys in OR , which are usually of glacial origin, exhibit a concave bottom and steep walls.
It is also possible to distinguish between longitudinal valleys (which are oriented parallel to the folds of the Mountain range) and the cross valleys (perpendicular to the mountain range)
But valleys not only exist in the land; The moon has its own version, in addition to the tens of thousands of craters, which often overlap each other. The lunar valleys, also known as lunar fissures, they have dimensions that range from 16 to 482 kilometers long and their extension in width is close to 3 kilometers. According to various studies, it is believed that its formation was due to the action of heat and an expansion inside, which affected the weakest areas of the satellite.
There are a lot of valleys of importance worldwide. He Great Rift Valley , for example, it has an area of 4,830 kilometers and houses the highest mountain in the continent African: the mount Kilimanjaro , which rises 5,895 meters above sea level.
He Nile Valley , on the other hand, it is much smaller (with an average of 19 kilometers wide), but it has great historical relevance because of having allowed the developing of civilizations in Egypt .
The Moon Valley
Name Valley of the moon make reference to parks from Bolivia, Chile and Argentina. In the latter country, it is a protected area located north of San Juan, one of its provinces, and represents a great treasure for the scientific community, since it is home to a paleontological reserve of considerable importance. Only there is it possible to appreciate all the characteristics of the triassic period orderly manner. The calculations about the age of its geological formations point to a minimum of 180 and a maximum of 230 million years.
Its landscape is very particular and thousands of tourists from all over the world come to appreciate it every year: the vegetation is scarce, the variety of colors in its soils It is impressive and the forms of its mountains, hypnotic. Despite being an area dedicated to scientific research, it is possible to take a guided tour on board a vehicle that stops at strategic points, so that visitors receive the relevant explanations; The duration of the tour revolves around 3 hours, and it is also possible to do it by bicycle.
It also has a Museum where a guided tours service is also offered; In this case, concepts about fossils in general and their extraction are taught. As if this were not enough, an already extinct volcano, whose chimney is currently known as Morado hill, gives those who wish to climb the opportunity to observe the landscape from a privileged point of view.