Lake Baskunchak (; ) is a

salt lake A salt lake or saline lake is a landlocked body of water that has a concentration of salts (typically sodium chloride) and other dissolved minerals significantly higher than most lakes (often defined as at least three grams of salt per liter). I ...

of 115 km² in

Astrakhan Oblast Astrakhan Oblast (; ) is a federal subject of Russia (an oblast) located in southern Russia. Its administrative center is the city of Astrakhan. As of the 2010 Census, its population was 1,010,073. Geography Astrakhan's southern border is the ...

Russia Russia, or the Russian Federation, is a country spanning Eastern Europe and North Asia. It is the list of countries and dependencies by area, largest country in the world, and extends across Time in Russia, eleven time zones, sharing Borders ...

, located at , about 270 km north of the

Caspian Sea The Caspian Sea is the world's largest inland body of water, described as the List of lakes by area, world's largest lake and usually referred to as a full-fledged sea. An endorheic basin, it lies between Europe and Asia: east of the Caucasus, ...

, and 53 km east of the

Volga The Volga (, ) is the longest river in Europe and the longest endorheic basin river in the world. Situated in Russia, it flows through Central Russia to Southern Russia and into the Caspian Sea. The Volga has a length of , and a catchment ...

. Since 1997, the area is protected as part of the Bogdinsko-Baskunchakski Nature Reserve. The surface elevation of the lake is 21 m below

sea level Mean sea level (MSL, often shortened to sea level) is an mean, average surface level of one or more among Earth's coastal Body of water, bodies of water from which heights such as elevation may be measured. The global MSL is a type of vertical ...

. It is fed by a river that draws from an area of 11,000 km². The

salinity Salinity () is the saltiness or amount of salt (chemistry), salt dissolved in a body of water, called saline water (see also soil salinity). It is usually measured in g/L or g/kg (grams of salt per liter/kilogram of water; the latter is dimensio ...

of the lake is about 300 g/L. Since the 8th century, its salt was mined and traded along the

Silk Road The Silk Road was a network of Asian trade routes active from the second century BCE until the mid-15th century. Spanning over , it played a central role in facilitating economic, cultural, political, and religious interactions between the ...

. Nowadays, the lake's salt of distinct purity (99.8%

NaCl Sodium chloride , commonly known as edible salt, is an ionic compound with the chemical formula NaCl, representing a 1:1 ratio of sodium and chloride ions. It is transparent or translucent, brittle, hygroscopic, and occurs as the mineral hali ...

) covers 80% of

's salt production. Depending on demand, 1.5 million to 5 million tons of salt are mined per year. To the south of the lake, Mount Bolshoye Bogdo rises to 150 m above

, forming the highest elevation in the

Caspian Depression The Caspian Depression or the Caspian Lowland is a low-lying flatland region encompassing the northern part of the Caspian Sea, the largest enclosed body of water on Earth. It is the larger northern part of the wider Aral–Caspian Depressio ...

. The hill is pushed up about 1 mm per year by a

salt dome A salt dome is a type of structural dome formed when salt (or other evaporite minerals) intrudes into overlying rocks in a process known as diapirism. Salt domes can have unique surface and subsurface structures, and they can be discovered us ...

Sinkhole A sinkhole is a depression or hole in the ground caused by some form of collapse of the surface layer. The term is sometimes used to refer to doline, enclosed depressions that are also known as shakeholes, and to openings where surface water ...

s, and

Karst caves Karst () is a topography formed from the dissolution of soluble carbonate rocks such as limestone and dolomite. It is characterized by features like poljes above and drainage systems with sinkholes and caves underground. There is some evide ...

of up to 1.5 km length lead through the hill. It also is the only area in

Europe Europe is a continent located entirely in the Northern Hemisphere and mostly in the Eastern Hemisphere. It is bordered by the Arctic Ocean to the north, the Atlantic Ocean to the west, the Mediterranean Sea to the south, and Asia to the east ...

where

Triassic The Triassic ( ; sometimes symbolized 🝈) is a geologic period and system which spans 50.5 million years from the end of the Permian Period 251.902 million years ago ( Mya), to the beginning of the Jurassic Period 201.4 Mya. The Triassic is t ...

lagerstätten surface. To the local

Kalmyk people Kalmyks (), archaically anglicised as Calmucks (), are the only Mongolic ethnic group living in Europe, residing in the easternmost part of the European Plain. This dry steppe area, west of the lower Volga River, known among the nomads as ...

, it is a sacred location. On the coast of the lake, there are deposits of

medicinal clay The use of medicinal clay in folk medicine goes back to prehistoric times. Indigenous peoples around the world still use clay widely. Such uses include external application to the skin and geophagy. The first recorded use of medicinal clay goes ...

and mud. The high season of the tourist season here is in the summer months - from May to September. The natural conditions of the area are truly unique: the healing air is high in bromine and phytoncides, sulphide silt mud, similar in effect and composition to the

Dead Sea The Dead Sea (; or ; ), also known by #Names, other names, is a landlocked salt lake bordered by Jordan to the east, the Israeli-occupied West Bank to the west and Israel to the southwest. It lies in the endorheic basin of the Jordan Rift Valle ...

mud, sodium chloride brine containing macro-complex and trace elements.

References

External links

Bogdinsko-Baskunchaksky Nature Reserve

Bogdo-Baskunchak Nature Reserve as a Geoheritage site
// Geology’s Significant Sites and their Contributions to Geoheritage (

Geological Society of London The Geological Society of London, known commonly as the Geological Society, is a learned society based in the United Kingdom. It is the oldest national geological society in the world and the largest in Europe, with more than 12,000 Fellows. Fe ...

Special Publications Vol. 543), 2024. {{DEFAULTSORT:Baskunchak Lakes of Astrakhan Oblast Endorheic lakes of Europe Saline lakes of Europe Sacred lakes of Russia

See also

References

External links