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acutipuerilis

I agree with the bivalve interpretation, but the really interesting bit is that it seems to show damage and repair - presumably from a failed predator attack.
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flinter
Hi all,

Found this on the thames foreshore! Its flint, but I' stumped as to the striated formation on one side?
Any help would be much appreciated.

fos1.jpg 
fos1b.jpg 
fos1a.jpg 
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Richard
Hi 

Flint does occur in a variety of shapes and colours, but I'm not convinced that this is flint.

A photo of the other side might help to resolve this doubt. 

The striations may be an impression of a large bivalve.
Richard
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flinter
Hi Richard,

Thanks for the help. Back of piece uploaded as suggested. The idea of a large bivalvee is a good one I think. Pretty sure its flint but i'm no geologist!

fos1c.jpg 
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Richard
Hi

Yes, it does look more like flint from the other side. 

The impression may be from an Inoceramid shell

The band along the left-hand side reminds me of flint I have seen that had grown around Inoceramid shell
Richard
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flinter
Hi Richard,

Thanks for all the info, Just checked out some images of inceramid shells in flint nodules. many as you say appear wrapped around the shell, so I think you may have sorted this one.

Thanks

David
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