shaun0fthedead Posted May 16, 2017 Share Posted May 16, 2017 My father asked me to see if i could find out what this is. Is it just a natural formation or something else? This is the only picture he sent me but I can get him to send more if needed. Link to comment Share on other sites More sharing options...
westcoast Posted May 16, 2017 Share Posted May 16, 2017 What size is it? Picture with scale is akways good. Any idea where it came from? Link to comment Share on other sites More sharing options...
shaun0fthedead Posted May 16, 2017 Author Share Posted May 16, 2017 10 minutes ago, westcoast said: What size is it? Picture with scale is akways good. Any idea where it came from? he found it in north central Arkansas. its about 65mm across and 30mm high Link to comment Share on other sites More sharing options...
Rockwood Posted May 16, 2017 Share Posted May 16, 2017 This is only slightly better than a guess, but what comes to my mind is the whorls of a calamites stem, or perhaps roots. Could be a natural cast. Link to comment Share on other sites More sharing options...
TqB Posted May 16, 2017 Share Posted May 16, 2017 Possibly a radial feeding trace fossil. Tarquin Link to comment Share on other sites More sharing options...
EMP Posted May 16, 2017 Share Posted May 16, 2017 4 hours ago, shaun0fthedead said: My father asked me to see if i could find out what this is. Is it just a natural formation or something else? This is the only picture he sent me but I can get him to send more if needed. I've seen similar things from the Coosa Shale of Alabama. I forget what they are called, though. Brooksella sp., that's it. I believe it's a kind of sponge. Link to comment Share on other sites More sharing options...
westcoast Posted May 16, 2017 Share Posted May 16, 2017 This might be a sponge but it looks quite different to brooksella which appears to have a much more prominent radial lobate pattern and much less prominent cental raised area. Link to comment Share on other sites More sharing options...
shaun0fthedead Posted May 16, 2017 Author Share Posted May 16, 2017 Thanks everybody, I think you are right it might be a sponge after looking at some more pictures online. Link to comment Share on other sites More sharing options...
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