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707 Views 14 Replies Last post: Feb 23, 2014 9:51 AM by AnimalGirl RSS
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Feb 2, 2014 9:33 PM

Mappleton today

I found this at Mappleton and was wondering if any one knew what it was?

 

Tabfish

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    Feb 2, 2014 9:39 PM (in response to Tabfish)
    Re: Mappleton today

    Could it be a fossil oyster which has been filled in with rock?

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    Feb 2, 2014 9:46 PM (in response to Tabfish)
    Re: Mappleton today

    Hi.  I found this image of a fossil oyster on Youtube which looks simular, but I'm not sure.

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      Feb 3, 2014 7:20 AM (in response to Dan)
      Re: Mappleton today

      Tabfish,

       

      Please could we have some more photos - other sides/angles. With scale (I appreciate your hessian sacking gives a clue.)

       

      As it is, I can't tell if the shapes we see on the (curved) surface as connected or separate, nor whether they are manifestations of a wavy surface or cylinders.

       

      Also, under a hand lens, can you see structure in those lines? (ignoring the fracture surface itself).

      I'm interested to know if you see lines running across or along (or maybe some of each orientation).

       

      Mike

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          Feb 4, 2014 9:33 PM (in response to Tabfish)
          Re: Mappleton today

          Re the preceding post/image (not the original specimen in this discussion):

           

          I think I can see fine ridges running across the back of that recess...

          If true, that suggests it is a mould of a fragment of a large bivalve (large enough not only for the evident thickness, but also the almost lack of curvture). The fine ridges represent calcite fibres, and seen in a section like this are commonly referred to as a palisade. Here's a clear example:

          - http://northislandexplorer.com/fossils/cretaceous/inoceramus.htm

           

          Mike

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    Feb 23, 2014 9:51 AM (in response to Tabfish)
    Re: Mappleton today

    Hi Tabfish,

    You are soooooooo lucky! You always find interesting rocks! Are you a fossil expert because if you are I would make you help me with MY fossil identification! :)

    AnimalGirl

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