sigint_devildog Posted March 23, 2018 Share Posted March 23, 2018 (edited) Mystery here. I found this near home on the banks of the Mississippi River here in east central Iowa. The geology in this area ranges from Ordovician to Pennsylvanian but with lots of glacial erratics and glacial mixing, not to mention the river mixing everything up!! It looks like a fossil concretion kinda like the Mazon Creek ones but is unusually polished, like a celt. Any input would be much appreciated! Edited March 23, 2018 by sigint_devildog Wrong description Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted March 23, 2018 Share Posted March 23, 2018 Yes, ironstone concretion by the look of it. 5 Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
izak_ Posted March 23, 2018 Share Posted March 23, 2018 Agreed, concretion. 1 Link to comment Share on other sites More sharing options...
sigint_devildog Posted March 23, 2018 Author Share Posted March 23, 2018 2 minutes ago, Foozil said: Agreed, concretion. Guess I’ll have to open it! Link to comment Share on other sites More sharing options...
Auspex Posted March 24, 2018 Share Posted March 24, 2018 42 minutes ago, Foozil said: Agreed, concretion. Yup: siderite/limonite, from the looks of it. "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...
caldigger Posted March 24, 2018 Share Posted March 24, 2018 1 hour ago, sigint_devildog said: It looks like a fossil concretion kinda like the Mazon Creek ones but is unusually polished, like a celt. Polished like a what?!!! 1 Link to comment Share on other sites More sharing options...
sigint_devildog Posted March 24, 2018 Author Share Posted March 24, 2018 1 hour ago, caldigger said: Polished like a what?!!! Not Celt! Lower case celt. Prehistoric stone tool! Lol! Link to comment Share on other sites More sharing options...
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