October 17, 2005 Source: Lakehead University:
http://communications.lakeheadu.ca/news/?id=208 Meteorite Impacts on Earth (Thunder Bay – Monday, October 17, 2005) Meteorites and their impacts on Earth is the topic of discussion during two presentations on Thursday, October 20, at 7:30 p.m. The talks, jointly sponsored by the Canadian Institute of Mining and Metallurgy, Thunder Bay Branch and the Meteorites and Impacts Advisory Committee to the Canadian Space Agency, take place in ATAC, Room 2001 at Lakehead University, and are open to and designed for the public. The speakers are Dr. Graham Wilson, Turnstone Geological Services Ltd., and Mr. Bill Addison of Thunder Bay Dr. Wilson’s talk is entitled "The cosmos comes to visit: Tales told by meteorites." Dr. Wilson will provide a general introduction to meteorites and their scientific significance. Mr. Addison’s talk is entitled "Evidence of cosmic hammering: Discovery of distal ejecta from the 1850 Ma Sudbury impact." He will describe the research he and colleagues at Lakehead U, the University of Toronto, and the University of Western Australia did on the fallout from the Sudbury impact. The impact produced a red hot rain of glowing glass that fell on the Thunder Bay area 1.85 billion years ago. It was produced when a large meteorite struck near Sudbury, shattering and melting rock, throwing it high above the atmosphere before it fell back to Earth. Over a metre of this hot debris, mostly rock glass, fell in the Thunder Bay area. The last debris to fall was fine dust, and it took as long as a year to fall, scattering a dusty film right around the world. The evidence of this has been discovered in the Thunder Bay area and near Hibbing, Minnesota. Members of the Media: Dr. Steve Kissin, Geology faculty member at Lakehead U and organizer of the talk, and speaker Bill Addison are both available for interviews. Please call Marla Tomlinson at 343-8177.
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