Lake, from the Latin lacus , is a permanent body of water that is deposited in the depressions of a land. The formation of a lake is produced from geological faults (which generate the depression of the terrain), from the accumulation of glacial moraines (accumulation of stones and mud) or from the obstruction of a valley due to avalanches produced on its slopes.
For example: “My boyfriend invited me to spend the weekend in a cabin by the lake” , “This summer I am going to Lake Otero to sail and enjoy the beach” , “They say that this lake has a great variety of fish ” .
A lake can present fresh or salt water, coming from rivers or from the outcrop of groundwater. Those large lakes that do not have an outlet to the sea are often referred to as closed seas. This is the case of the Caspian Sea, which lies between Asia and Europe.
It is possible to speak of different types of lakes. The artificial lakes are those created by humans to harness hydropower, have a source of drinking water, water sports or recreational activities, etc. In these cases, the lakes also known as dams, dams or reservoirs.
A crater lake, on the other hand, is one that forms in a volcanic crater from rainfall. A glacial lake, on the other hand, 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 . "
Lake Retba
Two narrow dunes separate the lake from the Atlantic Ocean, a fact 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 to such salinity, and the characteristic color it brings to the water is also appreciated especially in the dry season.
Given the high saline content of Lake Retba, very few organisms are able to survive in its waters, which is why humans use it mainly as a tourist destination and for the extraction of salt, an activity that takes place throughout the entire year by local people. 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 bacteria that give this lake its pink color are absolutely harmless to humans, making it 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.