Sizev_McJol Posted March 1, 2018 Share Posted March 1, 2018 This bulbous looking thing is an enigma to me my best guess is the head of a crynoid of sorts. Found at a construction site in Illinois, so the age is likely Devonian-Carboniferous. Anyone else see something like this? Link to comment Share on other sites More sharing options...
FossilDAWG Posted March 1, 2018 Share Posted March 1, 2018 I'm pretty certain it is an internal mold of the living chamber of a nautiloid along the lines of Phragmoceras. These occur in some of the Silurian dolomitic formations in northern Indiana. Don 1 Link to comment Share on other sites More sharing options...
Kane Posted March 1, 2018 Share Posted March 1, 2018 I wonder if it is possible that this is a very worn rugose coral. The irregularity of the banding, plus (what I can judge from the images here) the appearance of septae lines in images #3 and #4, might attest to that? 3 ...How to Philosophize with a Hammer Link to comment Share on other sites More sharing options...
Sizev_McJol Posted March 1, 2018 Author Share Posted March 1, 2018 1 hour ago, FossilDAWG said: I'm pretty certain it is an internal mold of the living chamber of a nautiloid along the lines of Phragmoceras. These occur in some of the Silurian dolomitic formations in northern Indiana. Don That is an idea I never would have guessed. I’ll research that. 1 hour ago, Kane said: I wonder if it is possible that this is a very worn rugose coral. The irregularity of the banding, plus (what I can judge from the images here) the appearance of septae lines in images #3 and #4, might attest to that? I just spent al last night cataloging my rugose corals, and now that you mention it, yeah there are some similarities. Link to comment Share on other sites More sharing options...
FossilDAWG Posted March 1, 2018 Share Posted March 1, 2018 Better photos would be useful. There may be septa there but on my monitor the photo is so blurry I don't really see them. Maybe my computer needs glasses? Don Link to comment Share on other sites More sharing options...
Rockwood Posted March 1, 2018 Share Posted March 1, 2018 +1 Rugose coral Link to comment Share on other sites More sharing options...
Kane Posted March 1, 2018 Share Posted March 1, 2018 9 minutes ago, FossilDAWG said: Better photos would be useful. There may be septa there but on my monitor the photo is so blurry I don't really see them. Maybe my computer needs glasses? Don You're quite eagle-eyed with IDs, so it could still be as you say. That being said, I am able to see a few other details that causes me to question the provisional ID. But perhaps better photos will help us all. ...How to Philosophize with a Hammer Link to comment Share on other sites More sharing options...
DevonianDigger Posted March 1, 2018 Share Posted March 1, 2018 I’m with @Kane on this one. I have pieces of rugose that are quite similar. Looks quite worn, but I vote +1 for rugose. Jay A. Wollin Lead Fossil Educator - Penn Dixie Fossil Park and Nature Reserve Hamburg, New York, USA Link to comment Share on other sites More sharing options...
TqB Posted March 1, 2018 Share Posted March 1, 2018 One more for rugose, I'm pretty sure those are septa as @Kane pointed out. Tarquin Link to comment Share on other sites More sharing options...
abyssunder Posted March 1, 2018 Share Posted March 1, 2018 It might be a worn rugose coral, with some Beekite formation visible in the third picture. 2 " 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...
FossilDAWG Posted March 1, 2018 Share Posted March 1, 2018 You're probably right about it being a rugose coral. I need to stop trying to ID blurry blobs. Don Link to comment Share on other sites More sharing options...
Sizev_McJol Posted March 1, 2018 Author Share Posted March 1, 2018 1 hour ago, FossilDAWG said: Better photos would be useful. There may be septa there but on my monitor the photo is so blurry I don't really see them. Maybe my computer needs glasses? Don 51 minutes ago, Kane said: You're quite eagle-eyed with IDs, so it could still be as you say. That being said, I am able to see a few other details that causes me to question the provisional ID. But perhaps better photos will help us all. I wish I could. I take 4K photos with my iPhone, but the images are too large to upload on the site. When I downgrade the image size (and quality) this is the result I get. Link to comment Share on other sites More sharing options...
Auspex Posted March 1, 2018 Share Posted March 1, 2018 17 minutes ago, FossilDAWG said: ...I need to stop trying to ID blurry blobs. Try these: "There has been an alarming increase in the number of things I know nothing about." - Ashleigh Ellwood Brilliant “Try to learn something about everything and everything about something.” - Thomas Henry Huxley >Paleontology is an evolving science. >May your wonders never cease! Link to comment Share on other sites More sharing options...
Sizev_McJol Posted March 1, 2018 Author Share Posted March 1, 2018 Are these better? Link to comment Share on other sites More sharing options...
JohnBrewer Posted March 1, 2018 Share Posted March 1, 2018 Coral for me too. John Map of UK fossil sites Link to comment Share on other sites More sharing options...
FossilDAWG Posted March 1, 2018 Share Posted March 1, 2018 They are better, and they show septa that confirm the ID of rugose coral. Don Link to comment Share on other sites More sharing options...
Sizev_McJol Posted March 1, 2018 Author Share Posted March 1, 2018 10 minutes ago, FossilDAWG said: They are better, and they show septa that confirm the ID of rugose coral. Don Great! Thank you Don! Link to comment Share on other sites More sharing options...
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