Vaisey Posted October 12, 2018 Share Posted October 12, 2018 In situ fossil (?) in roof of the UK cave. Carboniferous limestone. Anyone know what this might be. its around 18 inches in diameter. thanks Link to comment Share on other sites More sharing options...
Rockwood Posted October 12, 2018 Share Posted October 12, 2018 Cross section of a lycopod trunk. 2 Link to comment Share on other sites More sharing options...
TqB Posted October 12, 2018 Share Posted October 12, 2018 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? 1 Tarquin Link to comment Share on other sites More sharing options...
Rockwood Posted October 12, 2018 Share Posted October 12, 2018 Still, that is what it looks like. Link to comment Share on other sites More sharing options...
mikeymig Posted October 12, 2018 Share Posted October 12, 2018 Looks like Rhizostomites to me but like I said, looks like. Many times I've wondered how much there is to know. led zeppelin Link to comment Share on other sites More sharing options...
abyssunder Posted October 12, 2018 Share Posted October 12, 2018 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. comparative picture from here 5 " We are not separate and independent entities, but like links in a chain, and we could not by any means be what we are without those who went before us and showed us the way. " Thomas Mann My Library Link to comment Share on other sites More sharing options...
ynot Posted October 12, 2018 Share Posted October 12, 2018 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." My Fossil collection - My Mineral collection My favorite thread on TFF. Link to comment Share on other sites More sharing options...
TqB Posted October 12, 2018 Share Posted October 12, 2018 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 Link to comment Share on other sites More sharing options...
Rockwood Posted October 12, 2018 Share Posted October 12, 2018 Agreed. The feature just above it in the photos is explained well by dissolution caused by channeling of water toward a point. Link to comment Share on other sites More sharing options...
Rockwood Posted October 12, 2018 Share Posted October 12, 2018 18" What do you suppose snapped that sucker off ? Link to comment Share on other sites More sharing options...
Bobby Rico Posted October 12, 2018 Share Posted October 12, 2018 1 hour ago, Rockwood said: 18" What do you suppose snapped that sucker off ? That must been huge . Maybe it’s own weight? Link to comment Share on other sites More sharing options...
Vaisey Posted October 13, 2018 Author Share Posted October 13, 2018 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 Link to comment Share on other sites More sharing options...
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