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Author Topic:   Mammals rebound
Member (Idle past 93 days)
Posts: 1800
From: Prague, Czech Republic
Joined: 10-22-2008

Message 16 of 20 (865865)
11-01-2019 10:50 AM
Reply to: Message 12 by Faith
11-01-2019 8:01 AM

Re: Mammals not fossilized in the usual way?
So in this case instead of the bones getting fossilized by the replacement of bone material with a fossilizing mineral this mineral collected AROUND the bones instead and built up a rounded casing for them? So inside these concretions are unfossilized bones? Why the different process?

AbE watched it again. There's one point where they say the bones were ALSO fossilzed so I guess that answers my question. Why they also formed this ball of mineral within the rock is still a question though.

There was interesting research on this question recently too. Bunch of researchers from Japan argue that it's due to the release of calcium from bones interacting with clay of certain chemical compositions; and that these calcite concretions probably only take a few years to form.

Full article in Nature here (open access).

Summary in Forbes magazine here

This message is a reply to:
 Message 12 by Faith, posted 11-01-2019 8:01 AM Faith has responded

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