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Re: great disappearing meteorite fall acts



>Following a little further on the fragmentation discussion suggested by
>Lewis' book, he estimates a 0.1 to 10 bar crushing strength for CI
>carbonaceous chondrites.  This is one of the reasons we have so few
>samples.  

Yes, the carbonaceous chondrites are a fragile bunch, and they don't
tend to make large meteorite falls.  However, when you look at carbonaceous
chondrites at the other end of the scale, down to the dust size
particles and smaller, they are surprisingly robust.  In a conversation
with Don Brownlee, Brownlee had noted that the meteorite particles
recovered from the ocean floors are overwhelmingly carbonaceous chondrites.
Also, if you will recall, the small meteorite fleck found in the K/T layer
from the floor of the Pacific Ocean was identified as a carbonaceous
chondrite. 

Ron Baalke

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