Suvasvesi

From Vero - Wikipedia
Jump to navigation Jump to search

Template:Short description Template:Infobox lake

Sunset at lake Suvasvesi
Sunset at lake Suvasvesi

Suvasvesi is a lake in Eastern Finland near the city 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 Template:Convert making it the 18th largest lake in Finland. Kuukkarinselkä is the third deepest lake in Finland measuring Template:Convert 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 Template:Convert in diameter. Its age is estimated to be about 85 Ma<ref>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.</ref> but the Earth Impact Database (EID) gives a broader span of less than 1000 Ma.<ref>Template:Cite Earth Impact DB</ref>

Haapaselkä resembles the northern counterpart and it was also suspected to be an impact crater. It has recently been confirmed and is usually referred as Suvasvesi South crater.<ref name="Ymparisto1"/><ref name="Ymparisto2"/><ref name=suva>Template:Cite Earth Impact DB</ref> It is similar in size, and the age of the crater is estimated to be 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<ref name="Buchner">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</ref> but EID gives it as around 250 Ma.<ref name=suva/>

See also

References

Template:Reflist

Template:Impact cratering on Earth


Template:EasternFinland-geo-stub Template:Triassic-stub