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Lake Yanisyarvi : ウィキペディア英語版 | Lake Yanisyarvi
Lake Yanisyarvi ((ロシア語:Янисъярви); (フィンランド語: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 in diameter. 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==
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Lake Yanisyarvi」の詳細全文を読む
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