Lake Svetloyar

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Lake Svetloyar
Lake Svetloyar
Location	Nizhny Novgorod
Coordinates	56°49′07″N 45°05′35″E / 56.81861°N 45.09306°E / 56.81861; 45.09306Coordinates: 56°49′07″N 45°05′35″E / 56.81861°N 45.09306°E / 56.81861; 45.09306
Type	unknown
Native name	Светлояр  (Russian)
Max. length	0.5 kilometres (0.31 mi)
Max. width	0.35 kilometres (0.22 mi)
Surface area	0.1483 square kilometres (0.0573 sq mi)
Max. depth	33.4 metres (110 ft)
Surface elevation	109 metres (358 ft)

People enjoying nice weather at the lake

Lake Svetloyar (Russian: Озеро Светлоя́р, romanized: ozero svetloyar) is a lake in the Voskresensky District of the Nizhny Novgorod Oblast in central Russia. It is located within the Voskresenskoe Povetluzhye Nature Park. In 2015, the lake was included in the Register of Cultural Heritage Objects (Historical and Cultural Monuments) of the Russian Federation as an object of cultural heritage of municipal (local) significance as part of the cultural and landscape complex of Lake Svetloyar and the Village of Vladimirskoye.^[1] It is closely associated with the Legend of Kitezh, a sunken city.

Description[]

The lake is located in between the Kerzhenets and Vetluga rivers, both tributaries of the Volga.^[a] The area was declared a natural park in 2008. The lake has an oval shape (470 × 350 m) with the longer axis aligned north-south. It reaches a depth of 33.4 m,^[2] which differentiates it from neighboring lakes. Its deepest point is in the southern part of the lake, which rises to a shallow platform, ranging in depth from 22 to 24 m. In the northern, relatively shallow part of the lake, the depth change is smoother compared to the southern part.

The surface of the lake is 109 m above sea level. Its shores are somewhat elevated, and the lake itself lays in a small basin. The hills that encircle it are most distinctly manifested from the south, where they form an arc. The height of the hills reaches 122–124 m above sea level (13–15 m above the lake's water level) and are separated by deep (7–8 m) ravines.^[2]

The lake's water is transparent to a depth of more than 5 m. The lake is said to be relatively cold.^{[citation needed]} The banks are weakly swamped.^[2] To the north-east is the small, shallow Lunda River, from which the lake is connected by a stream. The runoff from the lake through the stream was disturbed during the construction of a road during the Soviet era. As a result, the lake began to swamp. Restoration of natural lake flow occurred in the 1990s.^{[citation needed]}

In the 2000s a number of studies confirmed the meteorite hypothesis of the origin of Svetloyar and some neighboring lakes.^[3] In 2009, the results of field studies were published, confirming the hypothesis of the meteoric origin of the lake 3.0-3.2 thousand years ago.^[4]

The volume of the lake basin (not the lake itself) is about 1.5 km³, and the area of the lake itself is 14.83 hectares. The thickness of the bottom sediments is about 8 m.^[2]

Origin[]

Various researchers during different timeframes have hypothesized about the glacial, karstic, old, volcanic, neotectonic, salt-dome, and meteorite origin of the lake. The first explorer of the lake in the late 19th century was a Russian geologist, Vasily Dokuchaev, who suggested it was a meteorite crater. The volcanic origin of the lake was first suggested in the early 20th century by the writer Vladimir Korolenko. Amateur archaeologist A. P. Polivanov^[5] conducted excavations on one of the Svetlogorsk hills and discovered the remains of ancient tools related to the Stone Age.

In 1969, under the leadership of Mark M. Barinov,^[6] scuba divers using acoustical systems detailed the complex structure of the relief of the bottom of the lake. The central pit-hollow is fringed by a system of two underwater terraces, expanding in the northern and narrowing in the southern parts of the lake and having depths of 18-20 and 9–10 m, respectively. It was suggested that a multistage cyclic-periodic formation, very young in the scale of geological time, as a result of neotectonic processes. Based on this, it was concluded that the central basin was formed a little more than a millennium (about 1100–1200 years) ago in the form of a small lake with a depth of 15–17 m, and the immersion of the lower terrace occurred approximately 700–800 years ago.

Recently^[when?], a number of studies confirmed the meteorite hypothesis^{[citation needed][dubious – discuss]} of the origin of Svetloyar and some neighboring lakes. In 2009, the results of field studies^{[citation needed]} bolstered the hypothesis of the meteorite origin of the lake, around 3 thousand years ago. The correct form, depth, the geological structure of the surrounding hills, the stratigraphy of bottom sediments, numerous fragments of fused rocks, rounded teardrop formations of a black foamed vitreous mass, analogous to impactites, attest to the meteorite origin of the lake. The heavenly body that created Svetloyar could move from north to south along a low trajectory at an angle of 30-40 ° to the Earth's surface.

Media coverage[]

In 1993, the creative association "Ekran" (Russian: Экран, romanized: Ekran, lit. 'Screen') released the film "The Tale of the Great and Invisible City of Kitezh" (writer and director V. Kukushkin), about "the mythological roots and the search for the invisible" City of Kitezh "under the smoothness of Lake Svetloyar in the Nizhny Novgorod region".^[b] The film was shown on the first channel of Central Television in Easter on April 17, 1993, before the first television broadcast of the Easter service from the Epiphany Cathedral in Moscow.^{[citation needed]}

Notes and references[]