Alexander D.G Posted November 22, 2018 Share Posted November 22, 2018 I found this one at the Jurassic Coast along side some other fossils. The fossil is about 2.5 cm wide and is heavier than it looks (tried a magnet but it had no effect on it). The second picture is a close up of a crack at the side (top right on the first picture), from what i could make out it looked like pyrite which is most likely becuase i also found a pyritised ammonite on the same beach. Any help would be greatly appreciated! Link to comment Share on other sites More sharing options...
ynot Posted November 22, 2018 Share Posted November 22, 2018 Welcome to TFF! Sorry, but it is not a fossil. It is an iron concretion. They are not magnetic. 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...
Misha Posted November 22, 2018 Share Posted November 22, 2018 I am not an expert but I don't see a fossil in that I think it might just be mineral growths or more likely a cluster of concretions. Link to comment Share on other sites More sharing options...
Alexander D.G Posted November 22, 2018 Author Share Posted November 22, 2018 Thank you for the fast reply, i found some similar concretions when i looked it up, not a fossil but still a cool looking rock. Link to comment Share on other sites More sharing options...
Rockwood Posted November 22, 2018 Share Posted November 22, 2018 This looks like a good candidate to contemplate the involvement of bacteria in it's formation. I'm not sure it has ever been suggested that it would mean this would qualify as a fossil though. Link to comment Share on other sites More sharing options...
Alexander D.G Posted November 23, 2018 Author Share Posted November 23, 2018 Don't know a lot about the involvement of bacteria in the creation of concretions, why would you think that might have been the case here? Link to comment Share on other sites More sharing options...
Rockwood Posted November 23, 2018 Share Posted November 23, 2018 It's easy for me to picture colonies shaped like this. Link to comment Share on other sites More sharing options...
Alexander D.G Posted November 23, 2018 Author Share Posted November 23, 2018 Thank you for your analysis, hadn't even considered the idea of bacteria being involved. Link to comment Share on other sites More sharing options...
Rockwood Posted November 23, 2018 Share Posted November 23, 2018 5 minutes ago, Alexander D.G said: Thank you for your analysis, hadn't even considered the idea of bacteria being involved. It most likely wouldn't be the kind of bacteria your soap promises to kill most of. I really don't know too much about it, but I think anaerobic bacteria involving sulfides is mentioned. Link to comment Share on other sites More sharing options...
Alexander D.G Posted November 23, 2018 Author Share Posted November 23, 2018 Anareobic bacteria were most likely present because there is pyrite on the concretion. Link to comment Share on other sites More sharing options...
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