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Sarah the Odd
Hello everyone, I’ve just joined up and loving what I’ve seen so far! I’ve been a (very!) amateur collector for about 35 years, found my first fossils as a small child and carried on hunting whenever I had a chance.

I found this last week along a fault in Jurassic rock, West Somerset, amongst some Gryphaea. I thought it was coral but have been told it isn’t. I’m not convinced though so can anyone tell me what they think it could be please? There is a video but it’s on my YouTube account and unsure if I’m allowed to link that here. I’d be eternally grateful if anyone can come up with an ID! Click image for larger version - Name: 6A6C840B-2AF6-4458-9827-44DD604D9F67.jpeg, Views: 76, Size: 427.05 KB Click image for larger version - Name: 8C5BB64F-6926-4F05-B5A0-0EA01E1EBF1E.jpeg, Views: 71, Size: 482.99 KB
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prep01
Hello Sarah and welcome to the forum. I'm not 100% sure it's a natural rock, those lines look very regularly spaced. I am pretty sure that it isn't coral though! Could we have a close up (but in focus) of an edge that is broken and a scale (a ruler is best) in all photos. You may need to knock a little bit off an edge with a hammer.
Colin Huller
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Dirty Pete
Maybe mineralisation associated with the fault plane, remnants of slickensides? I'm not convinced it's an animal.

Pete.
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Brittle Star
Hi
My first impression is that is a layered rock and the layer underneath is showing through due to erosion. No idea wht the rock is though so may be way out.
JW

 Never ask a star fish for directions
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Sarah the Odd

Many thanks for all of your replies! The video has lots of angles and I tap it a few times too - the sound doesn't come out great but you can hear a distinctive ring. https://www.youtube.com/watch?v=z4VLgfvivt4&t=3s (please admin delete if not allowed, I couldn't see anywhere saying videos couldn't be linked)

 

I will grab some more photos tomorrow in daylight 😉

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estwing
Plant material, maybe, e.g very worn Stigmaria?

[stigmaria-ficoides-brongiart--[5]-248-p] 
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Bobo the bear
Worn plant material..lepidodendron?
Bobothebear
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tc
I'd go with worn plant material, it reminds me of this piece of Sigillaria trunk I found at Whitecroft Spoil earlier in the year.

Sigillaria.jpg 


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Sarah the Odd
That's awesome, thank you all 😉 I'll go have a Google with the names you've given me and see what I can come up with! [thumb]
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Dirty Pete
Hi Sarah, where did you find it in West Somerset? I don't think there's much in the way of coal measure outcrops in that part of the country so if it's a vegetable then presumably it's an erratic.
I looked at your video and stopped the action at this interesting point. This looks far more coral like but the resolution isn't good enough to see any details. 

Screenshot (2).png 
I'm leaning towards coral now or maybe worm tubes.........

Cheers

Pete
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Sarah the Odd
Sorry for not replying sooner. I found it at Helwell Bay, right on the main fault line 😉
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Dirty Pete
So no coal measures nearby. You need to look closely at the white (calcite?) tubular structures, can you make out any septa or tabulae (Coral) or are they just mineral (calcite?) lined tubes (Worm tubes).
I'm pretty sure you can rule out plant fossil. 

Pete. 
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