[meteorite-list] Tunguska Questions

[Meteorites USA]

I agree... If the Tunguska event was caused by a comet and not a 
meteoroid or asteroid there truly may not be any material left from the 
blast. However, if I remember correctly, the cometary theory is based 
not just on the fact no meteorites were found near the epicenter, but 
somewhat on the presence of high levels of carbon in the samples taken 
from peat and tree bark drill core samples near the epicenter. A 
carbonaceous meteoroid/asteroid could have left those same levels of carbon.





Darren Garrison wrote:
> On Sat, 16 May 2009 01:10:08 EDT, you wrote:
>
>   
>> 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. 
>>     
>
> Also, if Tunguska was cometary in origin, there might not have been anything
> much larger than dust (aside from the ice) to begin with.
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Regards,
Eric Wichman
Meteorites USA
http://www.meteoritesusa.com
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