levip Posted March 11 Share Posted March 11 I found this in moose lake MN looking for agates was curious what it might be thought possibly tiny sand dollar 1 Link to comment Share on other sites More sharing options...
A.C. Posted March 11 Share Posted March 11 To me it looks like it could be a cross section from a crinoid stem, Crinoids if you are unfamiliar are related to sand dollars (both echinoderms) It would be helpful to see a bit of a closer picture with some more light if at all possible. Link to comment Share on other sites More sharing options...
levip Posted March 11 Author Share Posted March 11 Ok not too familiar but I'll check it out I'll try another pic the round part isn't very big bout the size of a pencil eraser Link to comment Share on other sites More sharing options...
A.C. Posted March 11 Share Posted March 11 I’m still leaning toward a cross section from a crinoid stem though I am on the fence. 100% a fossil echinoderm… radial symmetry with the classic 5 point star pretty much rules out anything else. The size fits in with what I would expect with a crinoid stem though sand dollar/ sea biscuits can be small too. From my own experience crinoid stems tend to be a “clean break” with little if any curvature on the top plane. Your fossil from the photos looks like it has a bit of a “sphere-ish” shape going on which would fall more in line with what I would expect from a sand dollar/sea biscuit but it could just be the weathering/preservation of the fossil. From doing quick searches online it appears more common to be a crinoid stem for the area though admittedly I am unfamiliar with the area. Definitely continue to wait for other more knowledgeable responses. Either way is a super neat fossil and I am sure would look great under magnification. Link to comment Share on other sites More sharing options...
DPS Ammonite Posted March 11 Share Posted March 11 Not a native Minnesota sand dollar since they occur after the Cretaceous. The latest marine layers in Minnesota are Cretaceous per this map: My goal is to leave no stone or fossil unturned. See my Arizona Paleontology Guide link The best single resource for Arizona paleontology anywhere. Link to comment Share on other sites More sharing options...
levip Posted March 11 Author Share Posted March 11 Thank you for the info glad it is some kind of fossil so you think it was brought in from somewhere else if it is sand dollar or it's a crinoid stem if it's native Link to comment Share on other sites More sharing options...
DPS Ammonite Posted March 11 Share Posted March 11 Just now, levip said: Thank you for the info glad it is some kind of fossil so you think it was brought in from somewhere else if it is sand dollar or it's a crinoid stem if it's native Likely crinoid stem piece and not sand dollar. My goal is to leave no stone or fossil unturned. See my Arizona Paleontology Guide link The best single resource for Arizona paleontology anywhere. Link to comment Share on other sites More sharing options...
levip Posted March 11 Author Share Posted March 11 Sounds good appreciate the help Link to comment Share on other sites More sharing options...
Fossildude19 Posted March 11 Share Posted March 11 Solitary Crinoid columnal. Quite common finds in Paleozoic strata. 1 1 Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 __________________________________________________ "In every walk with nature one receives far more than he seeks." John Muir ~ ~ ~ ~ ><))))( *> About Me Link to comment Share on other sites More sharing options...
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