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

 

Söderfjärden

Crater Name
Location
Latitude
Longitude
Diameter (km)
Age (Ma)*
Exposed
Drilled
Target Rock**
Bolide Type***
Söderfjärden
Finland
N 63° 2'
E 21° 35'
6.6
~ 600
N
Y
C
-

 

Aerial Image

Map by Jarmo Moilanen

References
Abels, A., Bergman, L., Lehtinen, M. and Pesonen,L.J., Structural constraints and interpretations on the formation of the Soderfjarden and Lumparn impact structures, Finland, 4th ESF Workshop, p. 26. 2000.
Abels, A., Pesonen, L.J., Deutsch, A., Bischoff,L.and M.Lehtinen., A geographic information system-based characterization of the Soderfjarden impact structure, western Finland. Meteoritics and Planetary Science, v 33, n 4, p A8. 1998.
Abels, A., Pesonen, L.J., Deutsch, A., Bischoff, L., Lehtinen,M., The Soderfjarden Impact Structure, W. Finland: Multiple Data Integration with Implications for Morphometry, Cratering Process, and Post-Impact Sedimentary History, LPSC XXIX, Lunar and Planetary Institute, Houston, TX, (CD-ROM). 1998.
Grieve, R. A. F., The record of impact on Earth: Implications for a major Cretaceous/Tertiary impact event. Geological Society of America, Special Paper 190, pp. 25-37. 1982.
Gurov, E. P., Gurova, E. P., Impact structures on the Earth's surface (in Russian). Geologicheskii Zhurnal, v. 47, pp. 117-124. 1987.
Henkel, H., Pesonen, L. J., Impact craters and craterform structures in Fennoscandia. Tectonophysics, v. 216, pp. 31-40. 1992.
Lauren, L., Lehtovaara, J., Bostrom, R. and Tynni,R., On the geology and the Cambrian sediments of the circular depression at Soderfjarden, western Finland. Geological Survey of Finland Bulletin 297, pp. 1-81. 1978.
Lehtovaara, J. J., Soderfjarden: a Cambrian impact crater in western Finland. Tectonophysics, v. 216, pp. 157-161. 1992.
Lehtovaara, J. J., Soderfjarden, Western Finland - A Cambrian filled meteorite crater 100km west fo Lappajarvi (abstract). Pesonen, L.J. and Niemisara, H., eds., Symposium Fennoscandian Impact Structures, p. 29. 1990.
Lehtovaara, J. J., 40K-40Ar dating of the Soderfjarden crater, Vaasa, western Finland. Geologiska Foreningens i Stockholm Forhandlingar, v. 107, pp. 1-6. 1985.
Lehtovaara, J. J., Palaeozoic sedimentary rocks in Finland. Annales Academiae Scientiarum Fennicae, series A, III. Geologica-Geophysicia, v. 133. 1982.
Lehtovaara, J. J., Stratigraphical section through lower Cambrian at Soderfjarden, Vaasa, western Finland. Bulletin of the Geological Society of Finland, v. 54, pp. 1-2, 35-43. 1982.
Raitala, J., The bedrock of the Vaasa circular structure, western Finland. Deptartment of Astronomy, University of Oulu, Finland (Unpublished Report, 26 p.). 1985.

 

* 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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