matt2396 Posted March 5, 2016 Share Posted March 5, 2016 I was hammering a large chunk of limestone when this popped out. I dug the original rock out of the ground in southern Macon County, IL. From all of the ISGS information that I've read, I know this particular location lies atop the Shelbyville Moraine. I hope that's enough information for everyone. Thanks, Matt Link to comment Share on other sites More sharing options...
Auspex Posted March 5, 2016 Share Posted March 5, 2016 Lookin' like a brachiopod, but that's all I got. What are its dimensions? "There has been an alarming increase in the number of things I know nothing about." - Ashleigh Ellwood Brilliant “Try to learn something about everything and everything about something.” - Thomas Henry Huxley >Paleontology is an evolving science. >May your wonders never cease! Link to comment Share on other sites More sharing options...
janislav Posted March 5, 2016 Share Posted March 5, 2016 Brachiopod for sure and, yes, dimensions would help. Central Illinois has a lot of Mississippian rocks. If this brachiopod is quite large - several inches across - you might want to compare some images of Spirifer grimesi - from the Burlington Formation. Link to comment Share on other sites More sharing options...
matt2396 Posted March 5, 2016 Author Share Posted March 5, 2016 Sorry about that. Here's a penny for scale. Link to comment Share on other sites More sharing options...
howard_l Posted March 6, 2016 Share Posted March 6, 2016 If it is Mississippian it could be Brachythyris Howard_L http://triloman.wix.com/kentucky-fossils Link to comment Share on other sites More sharing options...
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