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245 Views 2 Replies Last post: Dec 6, 2013 9:32 PM by MikeHardman RSS
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Dec 6, 2013 3:33 PM

fossil?stromatolite?

Hello

Thanks for help!

I`ve got new specimen that I would be grateful if you could help me to identify it.

Pictures below ...looks like stromatolite to me

amberuuuu 020.JPGamberuuuu 022.JPG

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  • Currently Being Moderated
    Dec 6, 2013 3:50 PM (in response to 1bear)
    Re: fossil?stromatolite?

    Don't think it is a stromatolite or any fossil,  but I'm not sure what type of rock it is: maybe limestone.

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    • Currently Being Moderated
      Dec 6, 2013 9:32 PM (in response to Dan)
      Re: fossil?stromatolite?

      This is laminated siltstone showing small scale slump structures of a type generally called convolutions, or (in more extreme cases) 'ball and pillow' structure. Such structures occur on a range of scales, and are quite common. I have seen them in Spain, Ireland and several parts of the UK.

       

      Your specimen may also have been slightly deformed tectonically (the bend in the middle).

       

      Stromatolites can have a somewhat similar apperance, but you'd need to be in an appropriate geological terrain.

       

      Mike

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