jugglerguy Posted February 18, 2023 Share Posted February 18, 2023 A friend of mine found this fossil on South Point of Thunder Bay near Alpena, Michigan. The fossils here are from the Devonian Period. My best guess is that it's syringopora. Any identification help is appreciated. Thanks! Link to comment Share on other sites More sharing options...
Rockwood Posted February 18, 2023 Share Posted February 18, 2023 I think this is actually a branching rugose coral. The centers would be a rather fragile dissepiment. 1 Link to comment Share on other sites More sharing options...
TqB Posted February 18, 2023 Share Posted February 18, 2023 I agree it's colonial rugose coral, showing clear radiating septa. Syringopora usually only shows funnel shaped tabulae in the centre. (Rugose dissepiments are towards the outside, away from the centre. ) Tarquin Link to comment Share on other sites More sharing options...
Rockwood Posted February 18, 2023 Share Posted February 18, 2023 15 minutes ago, TqB said: (Rugose dissepiments are towards the outside, away from the centre. ) Sun of a gun. Tabulae in the center of rugose corals. I've had that screwy for a while I guess. 1 Link to comment Share on other sites More sharing options...
jugglerguy Posted February 19, 2023 Author Share Posted February 19, 2023 Thanks for the help. I didn't realize you were going to be looking so closely. I took a few more close ups. My son in law is a geologist and just got here for the weekend from out of town. He's not a fossil expert, but knows more than I do. We just spent some time looking at this fossil and looking for pictures of colonial rugose corals. I didn't realize rugose corals could be in colonies. Link to comment Share on other sites More sharing options...
Rockwood Posted February 19, 2023 Share Posted February 19, 2023 I still think tabulae look like dissepiment with a better sense of focus. That's them there. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now