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The crater was extremely difficult to identify from the air (do you see it? The crater is circled in this image at the end of this article., striking the surface at an angle between 40° and 55° to horizontal.It appears that the main mass survived atmospheric transit relatively intact, with fragmentation and partial melting during impact.In some cases the earth’s atmosphere slows the meteoroids to terminal velocity so they are relatively intact meteorites upon impact.These meteorites have rounded edges with regmaglypts.Several other meteorites of similar scale were recovered from additional localized anomalies evident only in the raw data.An option of the 2012 RASC General Assembly (GA) in Edmonton was a post-conference field trip to the Whitecourt Crater guided by Dr. The crater is just south of the town of Whitecourt, a two hour bus ride away from the GA site in Edmonton.
Approximate distribution of the ejecta blanket and the main soil pit and auger hole site locations are also provided.
CENTEMETRE SCALEThe largest Whitecourt meteorite presently discovered (a second view), a regmaglypted individual found in October 2010. J., 2008, The Discovery of a Late Holocene Impact Crater Near Whitecourt Alberta: 71st Meeting of the Meteoritical Society, 2008.
Copyright the Department of Earth and Atmospheric Sciences, University of Alberta.
(Kofman et al – Meteoritics & Planetary Science 2010)An image of the contact between the ejecta and the top of the paleosol, organics (charcoal), and underlying Ah horizon, used to delineate the ejecta blanket as revealed in the sample chamber of the auger.
In this image, the overlying ejecta represents ejected Ae horizon material. Combined results of two magnetic surveys performed using the GEM Systems GSM 19-TW. Dense vegetation along the southern half of the grid made surveying slightly more difficult.