Lillian Posted October 16, 2017 Share Posted October 16, 2017 A few months ago I was helped here to identify a clam fossil and now near the same area I have found this. It doesn't match any images that I have found searching. Thank you. Link to comment Share on other sites More sharing options...
coled18 Posted October 16, 2017 Share Posted October 16, 2017 My guess would be echinoid (sea urchin). I'm not really sure though. CD Link to comment Share on other sites More sharing options...
Fossildude19 Posted October 16, 2017 Share Posted October 16, 2017 Where was the item found? 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...
Lillian Posted October 16, 2017 Author Share Posted October 16, 2017 In Central Illinois. We dug a pond last year and I am finding a lot of interesting items in the mostly clay dirt. A few months ago I found a crystallized clam, rocks with shell fossils in them and an Indian jewelry bead made from a stone. Link to comment Share on other sites More sharing options...
Fossildude19 Posted October 16, 2017 Share Posted October 16, 2017 Can we narrow it down to a county? 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...
Lillian Posted October 16, 2017 Author Share Posted October 16, 2017 Livingston County south of Pontiac. Link to comment Share on other sites More sharing options...
piranha Posted October 16, 2017 Share Posted October 16, 2017 It looks like a possible astylospongiid sponge. Astylospongia, Carpospongia, Caryospongia, are all reported from the Ordovician of Illinois. This excellent paper has a bunch of similar examples for comparison: Rhebergen, F., & Von Hacht, U. (2000) Ordovician erratic sponges from Gotland, Sweden. GFF, 122(4):339-349 PDF LINK Link to comment Share on other sites More sharing options...
Fossildude19 Posted October 16, 2017 Share Posted October 16, 2017 That looks like a good match, Scott. Great work! 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...
Lillian Posted October 16, 2017 Author Share Posted October 16, 2017 You guys are the best! I wish I had your knowledge. My erratic sponge is on display with my other items. Can't wait to find find more. Link to comment Share on other sites More sharing options...
piranha Posted October 16, 2017 Share Posted October 16, 2017 14 minutes ago, Lillian said: You guys are the best! I wish I had your knowledge. My erratic sponge is on display with my other items. Can't wait to find find more. 'Erratic' only refers to glacial deposition of the sponges found in Sweden. Link to comment Share on other sites More sharing options...
Rockwood Posted October 17, 2017 Share Posted October 17, 2017 8 hours ago, piranha said: 'Erratic' only refers to glacial deposition of the sponges found in Sweden. It also has a much broader definition having to do with the distance that glaciers have displaced any rock from it's origin. Link to comment Share on other sites More sharing options...
doushantuo Posted October 17, 2017 Share Posted October 17, 2017 One of the standard depictions of European erratic transport Carpospongia globosa(weathered specimen) looks like a good bet? Sometimes the morphology of the megascleres is more informative than outer appearance,BTW (vide AND fide v. Hacht,Reitner et al) Glacial transport(sometimes with multiple reworking) AND frost are causes of secondary fragmentation,truncation,etc BTW: Show Us Your Sponges - Page 3 - Member Collections - The Fossil Forum www.thefossilforum.com › Fossil Discussion › Member Collections Vertaal deze pagina 19 okt. 2011 - Hope I can get it as pdf. ... Five specimens of Aulocopium aurantium, same deposits as previous sponges, also Ordivician in age. These are ... Link to comment Share on other sites More sharing options...
Lillian Posted October 17, 2017 Author Share Posted October 17, 2017 I stand corrected and am learning more. Link to comment Share on other sites More sharing options...
Lillian Posted October 17, 2017 Author Share Posted October 17, 2017 Looking at the Show us your sponges from page 3 - is that what this is too? I found this in the same area. I thought it was a bone. Link to comment Share on other sites More sharing options...
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