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object in tunnel in flint


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val horn

Went to Ruxton England looking for my own mammoth.  Brought home some large rocks instead.  Not sure what to make of the orange inclusion in this piece of flint.   The whole flint is about 3 by 5 inches with multiple rough spotty enclusions   There is significant discussion as to what these flints represent, one concept involves the death and collapse of glass sponges as in:  https://www.flint-paramoudra.com/flint-nodules.html  Is it a dying glass sponge, a worm and worm burrow, or something else entirely.  Help will be appreciated, thanks  

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Top Trilo

It appears to be a mold of something rather than the fossil organism as to what organism I don't know, what is the age of the formation?

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fifbrindacier

It's an internal mold of a boring animal but i don't know if it is a worm, a gastropod or a pelecypod. I don't see the features of a sponge and they need space to feed by filtration of water, so, to me that's not one.

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val horn

cretaceous uncertain beyond that

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