Lake Yanisyarvi
Template:Short description Template:Expand Finnish Template:Expand Russian Template:Infobox lake Lake Yanisyarvi (Template:Langx; Template:Langx) 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 Script error: No such module "convert". 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.
References
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