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4822 Views 4 Replies Last post: Feb 28, 2011 10:43 AM by Luanne - former Museum ID team member RSS
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Apr 20, 2011 2:06 PM

Answered - Concretion thought to be dinosaur egg



Message was edited by: Luanne

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    Feb 26, 2011 5:00 PM (in response to scottgreer)
    Re: Tell me this IS a dinosaur egg!?
    I'm sorry but I'm almost certain that this is not a dinosaur egg, just a rock by  the looks of it.
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    Feb 28, 2011 10:43 AM (in response to scottgreer)
    Re: Tell me this IS a dinosaur egg!?



    This looks like a concretion and not a fossil.  A concretion is where sediment is further hardened by the accumulation of minerals that have come out of soution in liquid and accumulated together. This often happens around a core which started off the mineralisation, forming spherical shapes with concentric layers like this one, which correspond to different phases of mineral accumulation or even different minerals being accumulated. The minerals further harden the sediment, so the concretion forms erodes out of the surrounding rock in tact.


    The information sheet below explains about concretions. Where is the specimen from by the way? This is always important information.


    Hope this helps!



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