----- Original Message ----- From: "S. Singletary" <[EMAIL PROTECTED]> To: "chris sharp" <[EMAIL PROTECTED]>; "Charles R. Viau" <[EMAIL PROTECTED]> Cc: <[EMAIL PROTECTED]> Sent: Thursday, September 18, 2003 9:23 PM Subject: Re: [meteorite-list] Serious question?
> At 08:55 PM 9/18/2003 +1000, chris sharp wrote: > >The iron impactor disintegrated and spread iron all over the planet in > >a fallout cloud and created a layer of iron rich material on the > >surface. > > My knee-jerk reaction to that is to think about the large iron meteorites > in our collections. They tend to be the most competent and coherent and > hence will hold together on impact. It doesn't seem likely to me that an > iron will disintegrate in the fashion you are talking about on impact. I'm > not sure of that, just my first reaction to the statement. > Good point. Perhaps it depends on the speed of impact. High cosmic velocity, more chance of vapourisation. Small scale iron impacts can create large red ejecta blankets. Scale it up a few orders of magnitude and I reckon you could turn the surface of a planet red. Go Spirit & Opportunity! cheers from Australia chris sharp ______________________________________________ Meteorite-list mailing list [EMAIL PROTECTED] http://www.pairlist.net/mailman/listinfo/meteorite-list
