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Name

SUVASVESI SOUTH

StatusProven
Country Finland
CoordinatesLat. N 62°24' Long.E 28°12'
Diameter km 3.8
Age Ma or date 710 - 1400
Synonyms Suvasvesi S, Haapaselkä.
Remarks This was though to be a twin with Suvasvesi North. Thus it was though their age may be the same. However, recent, yet to be published, study finds out that these two craters are not related (Schmieder et.al. 2014b). There is over 600 Ma between impacts. Different ages was speculated already earlier by others, since there is differences between preservation and geophysics between them.

Age of Suvasvesi South is poorly defined in spite of several datings from impactite samples. In Buchner 2009b 40Ar/39Ar age for Suvasvesi S was given as ~700.0 - 1880.0 Ma with possible minimum alteration age as 820 Ma. It seems that minimun age is 710 Ma. Maximum age 1400 Ma listed here is from the fact that there is some sandstone clasts in breccias.
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References
Buchner 2009b Buchner E., Schmieder M., Schwarz W.H., Trieloff M., Moilanen J., Öhman T. and Stehlik H., "A Proterozoic 40Ar/39Ar Age for the Suvasvesi South Structure (Finland)", abstract and poster, 72nd Annual Meteoritical Society Meeting (2009)
Lehtinen 2002 Lehtinen M.,Pesonen L.J., and Moilanen J., ''Impactites from Lake Suvasvesi impact structures, a possible double impact crater in Finland'', 9th ESF Impact Workshop, ''Impacts: A Geological and Astronomical Perspective'', (2002)
Schmieder 2010a Schmieder M., Buchner E., Jourdan F., Schwarz W.H., Trieloff M., Van Soest M.C., Wartho J.-A., Hodges K.V., Moilanen J., Hietala S. and Öhman T., "Updating the Finnish Impact Cratering Record", 41st LPSC, abstract 2036 (2010)
Schmieder et.al. 2014b Martin Schmieder M., Trieloff M., Schwarz W.H., Buchner E. and Jourdan F., Supportive comment on: "Morphology and population of binary asteroid impact craters", by K. Miljkovic, G.S. Collins, S. Mannick and P.A. Bland [Earth Planet. Sci. Lett. 363 (2013) 121-132] - An updated assessment, Earth and Planetary Science Letters 405, 281-284 (2014)
Werner 2001 Werner S.C., Plado J., Pesonen L.J., and Kuula M., ''The Two Suvasvesi Lakes in Central Finland - A Possible Doublet Impact Structure.'', 64th Annual Meteorological Society Meeting (2001)
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