aek Posted April 14, 2017 Share Posted April 14, 2017 Hi, I found this fossil in Dixon, IL in January, which I believe is the Galena formation. Not sure, but guessing it is a crinoid columnal. Also, curious if the thin top layer is volcanic ash (K-bentonite)? Thanks for any help. Link to comment Share on other sites More sharing options...
abyssunder Posted April 14, 2017 Share Posted April 14, 2017 It looks like a crinoid column, to me. Can we have an end view of the other side? " 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...
aek Posted April 14, 2017 Author Share Posted April 14, 2017 10 minutes ago, abyssunder said: It looks like a crinoid column, to me. Can we have an end view of the other side? Thanks! Here's the other angle. Link to comment Share on other sites More sharing options...
abyssunder Posted April 14, 2017 Share Posted April 14, 2017 Yes, It's a crinoid stem. In the middle of the section is a hole which is the lumen. Here is an example of a partial stem (pluricolumnal) from the Ordovician, Galena Formation, SE MN, from Bev's collection. " 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...
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