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404 Views 1 Reply Last post: Mar 3, 2013 8:58 PM by MikeHardman RSS
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Mar 3, 2013 2:37 PM

please help identify this

My son found this while walking the dog today and would like to know which animal its from?

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    Mar 3, 2013 8:58 PM (in response to DanielElwood)
    Re: please help identify this

    Well, it is a flint.

    The concentric structure seen in this broken scetion may result just from its mode of 'growth' (chemical alteration in situ in the solid rock, silica migrating from a finely-dispersed state to a concentrated one, gradually forming a larger lump). But that structure could at least partly be due to a fossil acting as a nucleaus for the flint.One of our flint collectors may have pertinent experience...

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