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  4. What is this stone that looks like it's been attacked by woodworm?
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What is this stone that looks like it's been attacked by woodworm?

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Offline chris (OP)

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What is this stone that looks like it's been attacked by woodworm?
« on: 12/11/2020 17:41:06 »
This was found in south Cambridgeshire, UK. It looks like a stone that's been attacked by the flint equivalent of woodworm! There are signs of these pits running right through the specimen. The images below are the "top" and "bottom" surfaces of the piece.

Can anyone offer a diagnosis for me?


* FOSSIL-1.jpg (803.46 kB . 2476x2724 - viewed 5508 times)
* FOSSIL-2.jpg (847.95 kB . 2458x2698 - viewed 5574 times)
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Offline Bill S

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Re: What is this stone that looks like it's been attacked by woodworm?
« Reply #1 on: 12/11/2020 21:18:31 »
Rough guess.  The holes were there first, in the form of borings possibly with a CaCO3 coating. The flint nodule was precipitated around them from a solution rich in silica.   
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