Arden Posted July 15, 2021 Share Posted July 15, 2021 We found this in a tributary of a creek that runs through my sister's backyard in St. Louis, Missouri. Also found druzy quartz, brachiopods, bryozoans, and other molluscs and a few geodes. It looks like burrows in rock (flint?) Top photo shows cluster of shells found at the bottom of the tube. The rock is about 1 square foot in size. Is it a trace fossil of a burrowing mollusc? Any information will be greatly appreciated. Link to comment Share on other sites More sharing options...
FranzBernhard Posted July 15, 2021 Share Posted July 15, 2021 Welcome to TFF from Austria! That´s a nice specimen of - ?? Well, I am somewhat biased and have found rather similar things in the same size range here over the big pond. I am imagining that this is mostly an external mold of a (colonial?) rugosa* coral. The "cluster of shells" could than be some remaining internal molds of such corals. I could be totally wrong, of course. Rugosa (link to wikipedia) *Note: The attribution to Paleozoic rugosa corals and not to Meso- and Cenozoic scleractinia corals is only based on the state they were found in. Franz Bernhard 1 4 Link to comment Share on other sites More sharing options...
Rockwood Posted July 15, 2021 Share Posted July 15, 2021 2 hours ago, FranzBernhard said: I could be totally wrong, of course. Not this time. Link to comment Share on other sites More sharing options...
Arden Posted July 16, 2021 Author Share Posted July 16, 2021 Thanks. This is definitely from a paleozoic site (Carboniferous). My sister thought it might be from a burrowing mollusc, and corals casts makes more sense to me. 1 Link to comment Share on other sites More sharing options...
Tetradium Posted July 17, 2021 Share Posted July 17, 2021 On 7/15/2021 at 4:24 AM, Rockwood said: Not this time. Had seen similar horn corals in platteville formation as well too. The outer part rotted away leaving the internal structures thou this picture is of a colonial rugose coral. 1 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