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470 Views 2 Replies Last post: Mar 24, 2014 12:50 PM by emmalou RSS
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Mar 23, 2014 6:22 PM

Is this a fossil?

Hello,

 

I found this on half moon bay, Heysham some years ago.

Are the markings some kind of creature or just markings on the rock?

 

Thanks.

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  • Currently Being Moderated
    Mar 23, 2014 9:43 PM (in response to emmalou)
    Re: Is this a fossil?

    The marks are bioturbation.

    That's where a creature has distubed the sediment, for instance by walking or resting on it or by burrowing through it; in this case the latter. We can't be sure what the creature was, but it might have made the burrow as place to live (like some marine worms do), or in the course of it tunneling through the sediment filtering-out food.

    The rock is a fine-grained sandstone, by the looks. It would have been deposited in an aquatic environment.

     

    Mike

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