Hi all - 

Thanks Bernd for the citations. I suppose Steve and Geoff did not recover any 
organic remains from Brenham which might allow carbon dates, but then my guess 
is even if they had the dates would have been far too young due to neutron 
release in impact. 

Right now I am particularly interested in any data on ancient mirrors made from 
meteorites.

Another topic - For Carancas, perhaps a variant of Boslough's new impact model 
may explain what was seen: the dissociated blast materials retained their 
momentum.

E.P. Grondine
Man and Impact in the Americas


      
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