Suavjärvi (Suvari) - a lake in the Medvezhyegorsky district of the Republic of Karelia , presumably one of the oldest known impact craters .
| Lake | |
| Suavjärvi | |
|---|---|
| Karelian Suavjärvi | |
| Morphometry | |
| Absolute height | 153 m |
| Dimensions | × 3 km |
| Area | 5.6 km² |
| Hydrology | |
| Type of mineralization | fresh |
| Swimming pool | |
| Pool area | 36.5 km² |
| Location | |
| A country |
|
| The subject of the Russian Federation | Karelia |
| Identifiers | |
| HWR : | |
General information
The surface area is 5.6 km². The catchment area is 36.5 km². Altitude - 153 m.
It is located 56 km northwest of the city of Medvezhyegorsk and 19 km south of the village of Padany .
The structure, which is interpreted as a crater, stands out in relief, is visible in satellite images and has a diameter of 16 kilometers. There is a negative anomaly of gravity and an anomaly of the magnetic field. The age of breccia contained there is estimated at approximately 2.4 billion years [2] [3] (the Siderian period of the Paleoproterozoic era [4] ), which makes this crater one of the oldest known meteorite craters of the entire Earth [2] [5] .
On the other hand, not all researchers agree with the fact that the shock structure is at this place [6] [7] . It is possible that breccias discovered there with signs of impact metamorphism are associated with other craters (possibly even redeposited) [7] .
Notes
- ↑ Surface Water Resources of the USSR: Hydrological Understanding. T. 2. Karelia and the North-West / ed. E.N. Tarakanova. - L .: Gidrometeoizdat, 1965 .-- 700 p.
- ↑ 1 2 Mashchak, MS; Naumov, MV The Suavjarvi Structure: an Early Proterozoic Impact Site on the Fennoscandian Shield (English) // Lunar and Planetary Science: journal. - 1996. - Vol. 27 . - P. 825-826 . - .
- ↑ Suavjärvi ( inaccessible link) . Earth Impact Database . Date of treatment November 7, 2012. Archived on May 2, 2018.
- ↑ International Stratigraphic Scale (August 2012 version) on the website of the International Commission on Stratigraphy
- ↑ Impact Structures Sorted by Age . Earth Impact Database . Date of treatment November 7, 2012. Archived December 5, 2012.
- ↑ Badyukov D. D. Meteorite craters in Russia (English) . Laboratory of Meteorics, Geoha RAS . Date of treatment November 7, 2012. Archived November 22, 2012.
- ↑ 1 2 Mikheeva A.V. Suavjärvi (Unavailable link) . A complete catalog of impact structures of the Earth . IVMiMG SB RAS . Date of treatment November 7, 2012. Archived December 4, 2012.
Links
- Suavjärvi ( inaccessible link) . Earth Impact Database . Date of treatment November 7, 2012. Archived on May 2, 2018.
- Mikheev A.V. Suavjärvi (Unavailable link) . A complete catalog of impact structures of the Earth . IVMiMG SB RAS . Date of treatment November 7, 2012. Archived December 4, 2012.
- Mashchak, MS; Naumov, MV The Suavjarvi Structure: an Early Proterozoic Impact Site on the Fennoscandian Shield (English) // Lunar and Planetary Science: journal. - 1996. - Vol. 27 . - P. 825-826 . - .
- Badyukov D. D. Meteorite craters on the territory of Russia (English) . Laboratory of Meteorics, Geoha RAS . Date of treatment November 7, 2012. Archived November 22, 2012.