Darren wrote: "Any numbers on how big the block would have to be? How small the surviving piece could be? I'm thinking of some of those chunks of ice that fall from the sky some times. Most come from planes. Could some be cometary?"
Campins H. and Swindle T. (1998) Expected characteristics of cometary meteorites (MAPS 33, 1998, pp. 1201-1211): "The possibility of ice meteorites from comets has been discussed by Berczi and Lukács (1997). They argue in favor of the survivability of ice meteoroids through Earth's atmosphere and conclude that some make it to the ground. However, no ice meteorite has ever been recovered. Although a cometary origin should be considered when and if any falling ice of extraterrestrial origin is discovered, we will concentrate on the dusty or rocky portion of comets." Best regards, Bernd ______________________________________________ http://www.meteoritecentral.com Meteorite-list mailing list [email protected] http://six.pairlist.net/mailman/listinfo/meteorite-list
