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454 Views 9 Replies Last post: Feb 5, 2014 6:58 PM by Dan RSS
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Feb 2, 2014 6:28 PM

Flint Echinoid?

Hi.  I found this in Skegness.  It is a piece of flint, but there is a strange fossil/rock inside it.

 

 

If it's an Echinoid, or any fossil, how could I prepare it?  Can flint fossils be prepared?  Could I use a weak acid which would remove the flint?

 

 

Sorry if the pictures aren't very good; it's quite small so it was hard to take a good picture.

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  • Currently Being Moderated
    Feb 2, 2014 8:44 PM (in response to Dan)
    Re: Flint Echinoid?

    Dan,

     

    Yes, it could be an echinoid, but it could also be some other type of shell - really difficult to tell.

     

    I don't know of a chemical way to selectively remove the flint (and the fossil itself may also be flint).

    Non-chemically... It would be difficult, too. I think you'd have to use a grinding technique (using carborundum or diamond powder as the abrasive). That would be tricky/risky, especially without training/practice and the right tools. Even then, the chances of accidental breakage would be significant.

     

    Some things, you just have to leave as a mystery!

     

    Mike

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  • Currently Being Moderated
    Feb 2, 2014 8:55 PM (in response to Dan)
    Re: Flint Echinoid?

    Hi Dan

    As Mike says - some things you just have to leave as a mystery.

    Flint won't prep like other rock were you have a weak point around your fossil, but flint will readily shatter straight through the fossil.

     

    Tabfish

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    Feb 2, 2014 9:58 PM (in response to Dan)
    Re: Flint Echinoid?

    I agree with Mike, either echinoid or a shell. Use a loupe to look at the structure, if it has lots of bumps on it then it could well be an echinoid. If it is smooth it will be a shell of some sort. Flint is difficult to prepare, does not look like your specimen could have anything done to it. You could give it a few hits with your hammer but it will most likely break.

     

    Best regards,

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