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Earth Impact Database Sorted by : | Name | Diameter | Age |

 

Keurusselkä

Crater Name
Location
Latitude
Longitude
Diameter (km)
Age (Ma)*
Exposed
Drilled
Target Rock**
Bolide Type***
Keurusselkä
Finland
N 62° 8'
E 24° 36'
30
<1800
Y
N
C
-

 

References
Ferriere, L., Raiskila, S., Osiniski, G.R., Pesonen, L.J. and Lehtinen, M. The Keurusselkä structure (Finland) - impact origin confirmed by universal-stage characterization of planar deformation features in quartz grains. Lunar and Planetary Science XXXXI, (1072.pdf). 2010. 
Ferriere, L., Raiskila, S., Osiniski, G.R., Pesonen, L.J. and Lehtinen, M. The Keurusselkä structure, Finland - Impact origin confirmed by characterization of planar deformation features in quartz grains. Meteoritics and Planetary Science, doi: 10.1111/j.1945-5100.2010.01032.x. 2010.
Hietala, S., Moilanen, J. and Kivelantie,B., Keurusselka - A new impact structure in central Finland. Lunar and Planetary Science Conference, XXXV, Abstract 1619. 2004.
Hietala, S., Moilanen, J., Keurusselka - Distribution of Shatter Cones, Lunar and Planetary Science XXXVIII, (1762.pdf). 2007. 
Hietala, S., Moilanen, J., Keurusselka - Distribution of Shatter Cones, Lunar and Planetary Science XXXVIII, (1762.pdf). 2007. 
Pesonen, L.J., Poutanen, M., Ruotsalainen, H.E., The Keurusselkä impact structure, central Finland - Preliminary geophysical data, Meteoritics and Planetary Science, v. 39, pp. A83, 2004
Poutiainen, M., and Heikkila, P. Fluid inclusions in microstructures of shocked quartz from the Keurusselka impact site, central Finland. Meteoritics & Planetary Science, vol. 48 pp.1043. 2013.
Raiskila, S., Heikkilä, P., Preeden, U., Elbra, T., & Pesonen, L.Physical properties of vilppula drill cores and petrographic analysis of associated breccias in keurusselkä impact structure, central Finland. Studia Geophysica et Geodaetica, 56:1-xxx. 2012
Raiskila, S., Plado, J., Ruotsalainen, H., and Pesonen, L.J. Geophysical signatures of the Keurusselka meteorite impact structure; implications for crater dimensions. Geophysica, vol.49, pp.3.
Raiskila, S., Salminen, J., Elbra, T. and Pesonen, L. J., Rock magnetic and paleomagnetic study of the Keurusselkä impact structure, central Finland. Meteoritics & Planetary Science, 46: 1670–1687. 2011
Schmieder, M., Jourdan, F., Hietala, S., Moilanen, J., Öhman, T., and Buchner, E. 2009. A High-Precision Late Mesoproterozoic 40Ar/39Ar Age for the Keurusselkä Impact Structure (Finland). 40th Annual Lunar and Planetary Science Conference (abstract #1028).

 

* pre-1977 K-Ar, Ar-Ar and Rb-Sr ages recalculated using the decay constants of Steiger and Jager (1977) Ages in millions of years (Ma) before present.

** Abbreviations: C - Crystalline Target; C-Ms - Metasedimentary Target; M - Mixed Target (i.e.sedimentary strata overlying crystalline basement); S - sedimentary target (i.e. no crystalline rocks affected by the impact event). From Osinski. G. R., Spray J. G., and Grieve R. A. F. 2007. Impact melting in sedimentary target rocks: A synthesis. In The Sedimentary Record of Meteorite Impacts, Geological Society of America Special Paper. Editors: Evans K. Horton W., King D., Morrow J., and Warme J. Geological Society of America: Boulder, in press.

***
From Koeberl,C. Identification of meteoritic components in impactites. 1998, Koeberl, C. The Geochemistry and Cosmochemistry of Impacts. 2007 and PASSC Files. (IAB, IIIAB, IIIB, IIID - Iron Meteorite)

 

 

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