minnbuckeye Posted June 29, 2019 Share Posted June 29, 2019 My last excursion into the fossiliferous rocks of SE Minnesota turned up this small plate of crinoidal material. I kept it because the one center piece looks a bit like a small crinoid cup to an uneducated eye (mine). This is TINY, about 3 mm in width. Cup?? If so, any genus/species to attach to it. Thanks for looking. @crinus Mike Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted June 29, 2019 Share Posted June 29, 2019 Yes looks like the end of the stem and the basal / infrabasal plates of a calyx to me. 5 Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
Herb Posted June 29, 2019 Share Posted June 29, 2019 crinoid stem pieces "Absence of evidence is not evidence of absence"_ Carl Sagen No trees were killed in this posting......however, many innocent electrons were diverted from where they originally intended to go. " I think, therefore I collect fossils." _ Me "When you have eliminated the impossible, whatever remains, however improbable, must be the truth."__S. Holmes "can't we all just get along?" Jack Nicholson from Mars Attacks Link to comment Share on other sites More sharing options...
Mark Kmiecik Posted June 29, 2019 Share Posted June 29, 2019 Crinoid parts for sure. As far as genus and specie is concerned, you are best off researching which formation you found them in and then finding out what is found in that formation and comparing your specimen to those. You may still not have enough "bits" to make a positive ID. Mark. Fossil hunting is easy -- they don't run away when you shoot at them! Link to comment Share on other sites More sharing options...
crinus Posted June 30, 2019 Share Posted June 30, 2019 I don't think those plates are part of the calyx. The stem goes through it. I think it is part of the stem. Is this Ordovician? I have never seen stems like that in my Ordovician. Joe Link to comment Share on other sites More sharing options...
abyssunder Posted June 30, 2019 Share Posted June 30, 2019 In my opinion, all the visible parts are crinoid pluricolumnals. Very nice find! " 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...
minnbuckeye Posted July 1, 2019 Author Share Posted July 1, 2019 @crinus, Just to yank your chain a bit, read my heading- crinoid cup??× decorah shale× se minnesota× Ordovician That gives you an answer. I find myself missing the headings of posts all the time. I actually looked at examples of all 14 species of crinoids from Decorah shale and NOTHING fit the center one. Thanks for everyone's help! But must admit, a bit disappointed. @Tidgy's Dad, @abyssunder, @Mark Kmiecik, and @Herb 1 Link to comment Share on other sites More sharing options...
crinus Posted July 1, 2019 Share Posted July 1, 2019 12 hours ago, minnbuckeye said: @crinus, Just to yank your chain a bit, read my heading- crinoid cup??× decorah shale× se minnesota× Ordovician That gives you an answer. I find myself missing the headings of posts all the time. I actually looked at examples of all 14 species of crinoids from Decorah shale and NOTHING fit the center one. Thanks for everyone's help! But must admit, a bit disappointed. @Tidgy's Dad, @abyssunder, @Mark Kmiecik, and @Herb Never read the fine print. 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