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525 Views 2 Replies Last post: Oct 16, 2015 10:39 PM by Tabfish RSS
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Oct 14, 2015 7:03 PM

Curious markings?

I found this specimen on the shingle at Black Ven, Charmouth. It has quite strange 'regular' patterning but I have no idea what it might be? Any ideas?

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    Oct 14, 2015 10:11 PM (in response to Richard W)
    Re: Curious markings?

    It's all that remain of a very worn away ammonite - you can see ribs and keel.  It is preserved in limestone.  There are a couple of modern sponge borings too - it had been in the sea a while before being cast up.

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    Oct 16, 2015 10:39 PM (in response to Richard W)
    Re: Curious markings?

    Hi Richard

    The beach system is probably the worst place for a fossil because of the energy created by wind and varying tides etc.

    If you stand and listen to a wave crashing onto shore you can hear the rocks grinding against each other, if you are a fossil collector you can use the conditions to find newly exposed ammonites but sometimes you do not discover them untill it is too late.

     

    Tabfish

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