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



Crater Name
Diameter (km)
Age (Ma)*
Target Rock**
Bolide Type***
Saskatchewan, Canada
N 50° 59'
W 106° 43'
395 ± 25



Clark, J. F., Geomagnetic surveys at four Canadian craters. Canada Department of Energy, Mines and Resources, Earth Physics Branch, Geomagnetic Report, pp. 1-41. 1979.
Demille, G., The Elbow structure of south-central Saskatchewan. Journal of the Alberta Society of Petroleum Geologists, v 8, n 5, p 154-162. 1960.
Gent, M. R., Kreis, L. K. and D. Gendzwill., The Maple Creek structure, southwestern Saskatchewan. Summary of Investigations 1992, Saskatchewan Geological Survey, Rep. 92-4, p 204-208. 1992.
Goudie, M. A., The Elbow area of Saskatchewan. Oil in Canada, Technical Section, p 18 - 22, April 30, 1956. 1956.
Grieve, R. A. F., Kreis, K., Therriault,A.M.and P.B.Robertson., Impact structures in the Williston Basin. Meteoritics and Planetary Science, v 33, n 4, p A63-A64. 1998.
Kupsch, W. O., Submask geology in Saskatchewan. Williston Basin Symposium, pp 10. 1956.


* 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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