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



Crater Name
Diameter (km)
Age (Ma)*
Target Rock**
Bolide Type***
Alberta, Canada
N 54° 00'
W 115° 36'
IIIAB iron


Photos of the crater site taken during the summer (top) and fall (bottom). The two photos are taken from the same position. Department of Earth and Atmospheric Sciences, University of Alberta. Used with permission

LiDAR images of the crater site, showing the full feature image (top) and bare earth image (bottom). Department of Earth and Atmospheric Sciences, University of Alberta. Used with permission

Herd, C. D. K., Froese, D. G., Walton, E. L., Kofman, R. S., Herd, E. P K., and Duke, M. J. M., Anatomy of a young impact event in central Alberta, Canada: Prospects for the missing Holocene impact record. Geology. v.36, no.12, pp. 955-958. 2008.
Kofman, R.S., Herd, C.D., and Froese, D.G., The Whitecourt Meteorite Impact Crater, Alberta, Canada. Meteoritics and Planetary Science, v. 45, no. 9, pp. 1429-1445. 2010.
Newman, J.D., Herd, C.D.K., Mineralogy, petrology, and distribution of meteorites at the Whitecourt Crater, Alberta, Canada. Meteoritics & Planetary Science, vol.50, pp.305-317. 2015.


* 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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