Abstract
The Keurusselkä structure is located in the Paleoproterozoic (Svecofennian) granite terrain in central Finland, and the first indication of its nature was the discovery of in situ shatter cones in metavolcanic and granitic rocks within an area that represents the central uplift with a diameter of 5–10 km.
Access provided by Autonomous University of Puebla. Download chapter PDF
Similar content being viewed by others
Name | Keurusselkä |
Latitude | N 62° 8ʹ |
Longitude | E 24° 36ʹ |
Size | 10–30 km |
Age | 1140 ± 6 Ma |
The Keurusselkä structure is located in the Paleoproterozoic (Svecofennian) granite terrain in central Finland, and the first indication of its nature was the discovery of in situ shatter cones in metavolcanic and granitic rocks within an area that represents the central uplift with a diameter of 5–10 km (Raiskila et al. 2011; Hietala and Moilanen 2007).
PDFs were found in a variety of minerals including quartz, plagioclase and also apatite; it also presents heavily fractured basement rocks, but large impact breccia deposits or impact melt, however, were not found, which indicates that Keurusselkä is indeed deeply eroded, and possibly much older compared with the other Finnish impact structures (Ferriere et al. 2010a, b; Poutiainen and Heikkila 2013; Hietala et al. 2004).
Ukonselkä, a roughly circular lake immediately west from Keurusselkä, is listed in impact crater databases as probable impact crater.
The crater structure is largely altered by erosive glacial factors. The crater morphologies are barely visible both in optical and X-band radar images.
COSMO-SkyMed image: strip image acquired 06 June 2013 with CSK2 geometry: ascending, right, HH polarimetry
References
Ferriere, L., Raiskila, S., Osiniski, G. R., Pesonen, L. J. & Lehtinen, M. (2010a). 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).
Ferriere, L., Raiskila, S., Osiniski, G. R., Pesonen, L. J., & Lehtinen, M. (2010b). The Keurusselkä structure, Finland—Impact origin confirmed by characterization of planar deformation features in quartz grains. Meteoritics & Planetary Science. https://doi.org/10.1111/j.1945-5100.2010.01032.x.
Hietala, S., Moilanen, J. (2007). Keurusselka—Distribution of shatter cones. Lunar and Planetary Science XXXVIII, (1762.pdf).
Hietala, S., Moilanen, J., & Kivelantie, B. (2004). Keurusselka—A new impact structure in central Finland. Lunar and Planetary Science Conference, XXXV, Abstract 1619.
Poutiainen, M., & Heikkila, P. (2013). Fluid inclusions in microstructures of shocked quartz from the Keurusselka impact site, central Finland. Meteoritics & Planetary Science, 48, 1043.
Raiskila, S., Salminen, J., Elbra, T., & Pesonen, L. J. (2011). Rock magnetic and paleomagnetic study of the Keurusselkä impact structure, central Finland. Meteoritics & Planetary Science, 46, 1670–1687.
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2019 Springer Nature Switzerland AG
About this chapter
Cite this chapter
Staffieri, S., Coletta, A., Battagliere, M.L., Virelli, M. (2019). Keurusselkä, Finland. In: Flamini, E., Di Martino, M., Coletta, A. (eds) Encyclopedic Atlas of Terrestrial Impact Craters. Springer, Cham. https://doi.org/10.1007/978-3-030-05451-9_95
Download citation
DOI: https://doi.org/10.1007/978-3-030-05451-9_95
Published:
Publisher Name: Springer, Cham
Print ISBN: 978-3-030-05449-6
Online ISBN: 978-3-030-05451-9
eBook Packages: Earth and Environmental ScienceEarth and Environmental Science (R0)