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Vaisey

Unknown cave fossil

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Vaisey

In situ fossil (?) in roof of the UK cave. Carboniferous limestone. Anyone know what this might be. its around 18 inches in diameter. thanks

20180927_140623.jpg    20180927_140622.thumb.jpg.6fdbf608a3911e19c5f2c30ddeee92f2.jpg

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Rockwood

Cross section of a lycopod trunk.

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TqB

That's a puzzler and I've seen a lot of UK Carboniferous limestone...  I'm not convinced it's a fossil but it could be a stromatoporoid or chaetetid.

Lycopod remains of any sort are vanishingly improbable in any Carb limestone thick enough to contain caves.

 

Roughly what area is this from?

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Rockwood

Still, that is what it looks like. :)

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mikeymig

Looks like Rhizostomites to me but like I said, looks like. 

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ynot
2 minutes ago, abyssunder said:

it could be a cave formation (speleothem)...... Maybe they are the bases of broken large stalactites.

I agree with this assessment.

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TqB
12 minutes ago, abyssunder said:

I think, it could be a cave formation (speleothem), and it looks like there's another one on the left side of the pictures. Maybe they are the bases of broken large stalactites. The concentric - and radiating patterns are similar to the ones presented below.

I think you've got it. :)

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Rockwood

Agreed. The feature just above it in the photos is explained well by dissolution caused by channeling of water toward a point. 

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Rockwood

:headscratch:18"

What do you suppose snapped that sucker off ?

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Bobby Rico
1 hour ago, Rockwood said:

:headscratch:18"

What do you suppose snapped that sucker off ?

That must been huge . Maybe it’s own weight?

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Vaisey

Thanks for all the answers and having revisited the sire although there are no other speleothems in the cave other than very young straws I think I agree with stal base

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