[meteorite-list] Tunguska Questions

[GeoZay at aol.com]

>>Do you really believe absolutely  EVERYTHING was destroyed from the 
blast?<<

I have no reason to  believe otherwise.

>> I know a nuclear explosion is powerful but  come on. Don't you 
think it's possible something larger than the grain of  sand, macroscopic 
particles, and isotopic evidence  survived?<<

Just about anything is possible, but so far no one has  come up with 
anything bigger that I know of. There's an awful lot of energy  involved here. 
After seeing and reading the reports about the massive rock fall  in Yosemite 
park about twenty years ago, where a lot of the rock material became  mostly 
powder, I can believe just microscopic material was left over.  Here  we are 
talking about a fall of about 2000 feet. The concussion blew over many  
full grown trees. It doesn't take much of my imagination to picture what could  
happen with something a bit bigger traveling over 12 miles/second suddenly  
hitting a solid resistance of air.
GeoZay  

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