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Unknown cave fossil

Vaisey

By Vaisey
in Fossil ID

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Vaisey Newbie

Vaisey

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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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TqB Regular Member

TqB

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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?

Tarquin

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mikeymig Regular Member

mikeymig

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

Many times I've wondered how much there is to know.  
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abyssunder Regular Member

abyssunder

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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.

 

20180927_140623.jpg.31502bf54dd9a13ad279871841f0ab14.thumb.jpg.e1909fc5fe137e8f09c3918aa14f4cad.jpgIMG_0202.thumb.jpg.27239dd1333e67f1d82da46e0d713a47.jpg

comparative picture from here

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ynot Regular Member

ynot

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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.

Darwin said: " Man sprang from monkeys."

Will Rogers said: " Some of them didn't spring far enough."

 

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TqB Regular Member

TqB

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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. :)

Tarquin

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Rockwood Regular Member

Rockwood

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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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Bobby Rico Regular Member

Bobby Rico

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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 Newbie

Vaisey

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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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