Hi, EP, List, George E. Williams, a mining geologist at Broken Hill Mine, first suggested Acraman was a crater as long ago as 1986: http://www.sciencemag.org/cgi/content/abstract/233/4760/200
Gene Shoemaker wrote about it in 1996. (Sorry, no link.) The Acraman impact was bigger than I said: 5 or 6 million megatons, rather than "only" one million megatons! There are the "required" iridium traces and some big shatter cones, too, so all the signs are there for Acraman. It appears now that more like 5000 meters of crust have eroded out of the crater since it formed. There is suspicion that the event extincted the mysterious Ediacaran fauna. http://www.informaworld.com/smpp/content~db=all?content=10.1080/08120090500181036 And the Australians are now officially referring to Acraman as the Acraman-Bunyeroo Event. Don't ask me what a Bunyeroo is... Maybe a relative of the Bunyip? Sterling K. Webb ______________________________________________ http://www.meteoritecentral.com Meteorite-list mailing list [email protected] http://six.pairlist.net/mailman/listinfo/meteorite-list
