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Graptolithina were a sort of worm that lived in the Cambrian and Carboniferous. You can find their fossils all over the place apparently, including in the Lake District. They have often been mistaken for pictures of some kind.

Crossposts: http://louisedennis.livejournal.com/347158.html

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From:

liadt

They do have a nice modern interior design look. Also like the fossilised maltesers;p

From:

purplecat

Some of the fossils have a kind of spiral design which looks remarkably artificial!

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Fossil Friday: Graptolithina

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