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Suvasvesi
Suvasvesi is a lake in Eastern Finland near the town of Kuopio. Suvasvesi consists of two circular open lakes, Kuukkarinselkä in north and Haapaselkä in south. The lakes are separated by a group of islands. The lake has 688 islands in total. The area of the lake is making it the 18th largest lake in Finland. Kuukkarinselkä is the third deepest lake in Finland measuring in the deepest point.
In 2001 shatter cones were found in Kuukkarinselkä making it the 6th known impact crater in Finland. The crater, usually referred as Suvasvesi North crater, is located in the center of Kuukkarinselkä and measures about in diameter. Its age is about 85 Ma.〔Schmieder, M., Schwarz, W. H., Buchner, E., Pesonen, L. J., Lehtinen, M. & Trieloff, M. 2012. Double and multiple impact events on Earth - Hypotheses, tests, and Problems. 75th MetSoc meeting (13–18 August 2012), Cairns, Australia, abstract no. 5005.〕
Haapaselkä resembles the northern counterpart and it was also suspected to be an impact crater. Haapaselkä crater is usually referred as Suvasvesi South crater.〔〔 It is similar in size, and the age of the crater is older than 700 Ma (probably about 710–720 Ma) based on argon-argon dating of impact melt rocks found near the southeastern shore of Lake Haapaselkä.〔(Buchner, E., Schmieder, M., Schwarz, W. H., Trieloff, M., Moilanen, J., Öhman, T., Stehlik, H.: A Proterozoic 40Ar/39Ar age for the Suvasvesi South structure (Finland). MetSoc 72, abstract no. 5076 )〕
==References==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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