At 30 km from Dakar — Senegal's capital — is a unique natural phenomenon — a pink lake, or Retba as it is called representatives of the people of the Wolof, the main ethnic group of the country. Size of giant bowls of bright pink water-like strawberry cocktail with cream, up to 3 square meters. km. The maximum depth of the lake is less than 3 meters.
In earlier times, the lake was Retba lagoon, which was connected to the ocean narrow channel. But the Atlantic surf, a little sand namyvali, sleep channel, and the lagoon has become a fairly deep salt lake. In the 1970s, in Senegal, a period of drought, resulting in strong shallow pond.
That's when the lake Retba and acquired its unusual color. The reason for the unique color of the water is in a lake inhabited by cyanobacteria — the most ancient organisms appeared on Earth 3.5 billion years ago. What is surprising is that in addition to them in this brine is no other organic life. The concentration of salt in the lake Retba almost 1.5 times more than in the Dead Sea — 380 grams per liter. In the Pink Lake, like the Dead Sea, it is very difficult to sink. You can safely swim on the water surface, while reading a book or newspaper.
Senegalese lake water color can change its color from light pink to brown. Color saturation is dependent on the time of day, from the clouds, and especially in the wind, as a strong wind cyanobacteria is activated and produces more of the enzyme, which stains the water pink.
Unusual lake lies to the north-east of Green Cape Peninsula, at the extreme southern tip of which is the city of Dakar.
Two-kilometer coastline of Lake Retba thickly strewn with flat-bottomed boats, very similar to the Russian ones. But they do not catch a fish, do not go to the next village and carry hay. Pink Lake on boats are only for the salt.
Due to the active salt mining lake Retba every year more and more shallower. Over the past decade, the area of the lake Senegalese decreased almost three times, and if in the near future do not take steps to protect this natural site, it may disappear from the face of the earth forever.
Category: Natural anomalies