Anatomy of a young impact crater in Central Alberta: prospects for the ‘missing’ Holocene impact record
| dc.contributor.author | Herd, Christopher D. K. | |
| dc.contributor.author | Froese, D. F. | |
| dc.contributor.author | Walton, Erin L. | |
| dc.contributor.author | Herd, E. P. K. | |
| dc.contributor.author | Duke, J. | |
| dc.date.accessioned | 2016-01-27 | |
| dc.date.accessioned | 2022-05-27T01:14:51Z | |
| dc.date.available | 2022-05-27T01:14:51Z | |
| dc.date.issued | 2008 | |
| dc.description.abstract | Small impact events recorded on the surface of Earth are significantly underrepresented based on expected magnitude-frequency relations. We report the discovery of a 36-m-diameter late Holocene impact crater located in a forested area near the town of Whitecourt, Alberta, Canada. Although undetectable using visible imagery, the presence of the crater is revealed using a bare-Earth digital elevation model obtained through airborne light detection and ranging (LiDAR). The target material comprises deglacial Quaternary sediments, with impact ejecta burying a late Holocene soil dated to ca. 1100 14C yr B.P. Most of the 74 iron meteorites (0.1–1196 g) recovered have an angular exterior morphology. These meteorites were buried at depths <25 cm and are interpreted to result from fragmentation of the original projectile mass, either at low altitude or during the impact event. Impact of the main mass formed the simple bowl-shaped impact structure associated with an ejecta blanket and crater fill. The increasing availability of LiDAR data for many terrestrial surfaces will serve as a useful tool in the discovery of additional small impact features. | |
| dc.description.uri | https://library.macewan.ca/cgi-bin/SFX/url.pl/86P | |
| dc.identifier.citation | Herd, C. K., Froese, D. G., Walton, E. L., Kofman, R. S., Herd, E. K., & Duke, M. M. (2008). Anatomy of a young impact event in central Alberta, Canada; prospects for the missing Holocene impact record. Geology, 36(12), 955-958. doi:10.1130/G25236A.1 | |
| dc.identifier.doi | https://doi.org/10.1130/G25236A.1 | |
| dc.identifier.uri | https://hdl.handle.net/20.500.14078/470 | |
| dc.language | English | |
| dc.language.iso | en | |
| dc.rights | All Rights Reserved | |
| dc.subject | absolute age | |
| dc.subject | aerial photography | |
| dc.subject | Alberta | |
| dc.subject | Quaternary | |
| dc.title | Anatomy of a young impact crater in Central Alberta: prospects for the ‘missing’ Holocene impact record | en |
| dc.type | Article |