Lake, from Latin lacus, is a permanent body of water that is deposited in the depressions of a land. The formation of a lake occurs from geological faults (which generate the depression of the ground), the accumulation of glacial moraines (accumulation of stones and mud) or the obstruction of a Valley due to avalanches produced on its slopes.
For instance: “My boyfriend invited me to spend the weekend in a cabin by the lake”, “This summer I’m going to go to Lake Otero to sail and enjoy the beach”, “They say that this lake inhabits a great variety of fish”.
A lake can present fresh or salt water, coming from the rivers or the outcrop of groundwater. Those large lakes that do not have an outlet to the sea are often referred to as closed seas. That is the case of Caspian Sea, which is between Asia Y Europe.
It is possible to speak of different types of lakes. The artificial lakes are those created by him human being to take advantage of hydraulic energy, have a source of drinking water, do water sports or leisure activities, etc. In these cases, the lakes are also known as dams, dams or reservoirs.
A crater lake, for its part, is one that is formed in a volcanic crater from rainfall. A glacial lakeInstead, it is produced from the dynamics of thick ice sheets on a low-slope terrain.
That belonging to or relating to lakes is known as lacustrine: “The lake walk was what I liked the most about the holidays”.
Less than an hour from the capital of Senegal is a very particular lake, which usually impacts its visitors by the Colour pink of its waters, typical of a fairy tale. At first glance, it may seem like an effect caused by photo retouching, but there is a scientific explanation that quickly convinces unbelievers and makes them want to visit this impressive landscape: a bacterium named Dunaliella salina lives in the lake and gives off a red pigment to absorb sunlight.
Two narrow dunes separate the lake from the Ocean Atlantic, data that explains its high salt content, which is compared to that of the Dead Sea and even exceeds it during the dry season (from November to June). Dunaliella salina, a class of halophilic micro algae especially known for its antioxidant action and used in cosmetics and nutrition, is attracted by such salinity, and the characteristic color that it brings to the water is also appreciated especially in the dry season.
Given the high contents saline of Lake Retba, very few organisms are able to survive in its waters, for which the human being mainly uses it as a tourist destination and for the extraction of salt, an activity that takes place throughout the year by people local. It is worth mentioning that around its 3 square kilometers of surface no village or town of great tourist or industrial relevance has been developed.
A very important piece of information for visitors is that the bacterium that gives this lake its pink color is absolutely harmless to human beings, which is why it is possible to swim in its waters. There are other pink lakes in the world, although they are usually very small or artificial. On the other hand is Lake Hillier, in Australia, which was discovered two centuries ago and the cause of its color is still unknown.