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Tiny worm casts or teeth


Cruisaire

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Brilliant Sharkdoctor! Although I observed them insitu with the clay stone, they must be more recent and likely not as old as perceived. 

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7 minutes ago, Cruisaire said:

Brilliant Sharkdoctor! Although I observed them insitu with the clay stone, they must be more recent and likely not as old as perceived. 

I'm pretty sure this form of construction started in the early Paleozoic.

I recently collected something similar to it from the Devonian. Haven't gotten around to posting it for confirmation though.

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