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Re: blood samples?
You bet Schweitzer should be cautious! The material that I have personally
seen come out of the Hell Creek Fm. has a lot of encrusting hematite. I
have often seen adjacent bones in channel facies; one bone with not a speck
of iron stain, and another bone 1 meter away with a half inch of the stuff on
it. Even with the rigorous preliminary work that that team did to determine
that the bone on the T. rex wasn't _replaced_, it is another matter to
say that the bones don't have a precipitate coating. The elemental iron
may be from hematite. I wonder if a study of the isotopic ratios could
illiminate the hematite possibility?
p.s. I saw the S.E.M. photomicrograph of the T. rex "blood cell" on, of
places, the "Today" show, during the week of the opening of
"Jurassic Park". No, I wouldn't say that MOR is always cautious.
That reminds me of the Chatterjee/ New York Times media event, in
which he announced the _Protoavis_ discovery.