Earth:Lake Yanisyarvi
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Short description: Lake in Republic of Karelia, Russia
| Yanisyarvi | |
|---|---|
 | |
  Yanisyarvi  Yanisyarvi | |
| Location | Republic of Karelia |
| Coordinates | [ ⚑ ] : 61°58′N 30°55′E / 61.967°N 30.917°E |
| Type | Impact crater lake |
| rivers, streams, evaporation">Primary outflows | Jänisjoki |
| Basin countries | Russia |
| Average depth | 11.6 m (38 ft) |
| Max. depth | 57 m (187 ft) |
Lake Yanisyarvi (Russian: Янисъярви; Finnish: Jänisjärvi) is a lake in the Republic of Karelia, Russia , located north of and draining to Lake Ladoga.
The basin of this somewhat circular lake was formed by meteorite impact 700±5 million years ago during the Cryogenian period. The crater is 14 kilometers (8.7 mi) in diameter.[1]
Prior to World War II, the lake was thought to be the second known volcanic caldera in Finland (the other was Lake Lappajärvi). Both were eventually recognized as impact craters.
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