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JayBee
Two separate specimens found on shore at Osmington Mills , not far to the east of the way down. Probably in limestone of Osmington Oolite series. I've taken a "cast" with a Blu Tack type material. IMG_2334.jpg  IMG_2333.jpg  IMG_2332.jpg  IMG_2331.jpg  IMG_2330.jpg  IMG_2329.jpg  IMG_2328.jpg  IMG_2326.jpg  IMG_2325.jpg
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Barrow Museum
This rather looks like the trace fossil "Ophiomorpha", which is an ichnogenus (not the name of the actual animal) name given to a fossil burrow.  In this case, the burrow was probably made by a small shrimp, if modern examples can be relied upon as analogues.  The shrimp dug its burrow in the soft sand sea floor, then to reinforce and stabilise the burrow walls, it used small balls of sediment, probably assisted by some mucus secretion, or maybe even faecal pellets, to build a barrier between its burrow and the unconsolidated sediment.   You illustrate some impressions of sections of the burrow system, made obvious where the small sticky sediment pellets have been eroded away.  I do know that they are recorded from these Oxfordian age Corallian sediments at Osmington Mills.
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JayBee
Many thanks, makes sense. I was hoping it was a starfish impression, but when I found the second one it looked very unlikely!
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prep01
I agree with BM, but it's a little unusual (for me anyway)!
Colin Huller
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