RockDaleCreek Posted June 8, 2016 Share Posted June 8, 2016 Hello again, all Probably 18 years ago, I found this round fossil in a creek on my property in West Central Illinois, (USA) and I want to know what it is. All retaliative information, weight/ height, ect, is located on the first picture, alond with tid-bits on the 3rd and 4th, as well. So....what is it and when was it alive???? Link to comment Share on other sites More sharing options...
ynot Posted June 8, 2016 Share Posted June 8, 2016 Partial gastropod? Tony Darwin said: " Man sprang from monkeys." Will Rogers said: " Some of them didn't spring far enough." My Fossil collection - My Mineral collection My favorite thread on TFF. Link to comment Share on other sites More sharing options...
RockDaleCreek Posted June 8, 2016 Author Share Posted June 8, 2016 I'm assuming so, Tony. Beyond that???? Link to comment Share on other sites More sharing options...
RockDaleCreek Posted June 8, 2016 Author Share Posted June 8, 2016 I don't know Link to comment Share on other sites More sharing options...
ynot Posted June 8, 2016 Share Posted June 8, 2016 I am not that familiar with mollusk, but I am sure that others here will be able to give a better ID. Tony Darwin said: " Man sprang from monkeys." Will Rogers said: " Some of them didn't spring far enough." My Fossil collection - My Mineral collection My favorite thread on TFF. Link to comment Share on other sites More sharing options...
izak_ Posted June 8, 2016 Share Posted June 8, 2016 Partial gastropod? Tony I agree with that. Link to comment Share on other sites More sharing options...
RockDaleCreek Posted June 8, 2016 Author Share Posted June 8, 2016 Thanks, Tony. Link to comment Share on other sites More sharing options...
Guguita2104 Posted June 8, 2016 Share Posted June 8, 2016 Toucasia rudist (strange bivalves with caracteristic features that lived between Late Jurassic and Cretaceous)??? Here it's a quick link for wikipedia (I think the explanation is quite easy, bbut there also other sites that explain it very simply and easily):https://en.wikipedia.org/wiki/Rudists Regards, Link to comment Share on other sites More sharing options...
RockDaleCreek Posted June 8, 2016 Author Share Posted June 8, 2016 Ahhh, interesting, Guguita !!! Thank you Link to comment Share on other sites More sharing options...
Fossildude19 Posted June 8, 2016 Share Posted June 8, 2016 Toucasia rudist (strange bivalves with caracteristic features that lived between Late Jurassic and Cretaceous)??? Here it's a quick link for wikipedia (I think the explanation is quite easy, bbut there also other sites that explain it very simply and easily):https://en.wikipedia.org/wiki/Rudists Regards, Most of the geology of "West Central Illinois" is paleozoic. If we knew what county it was found in, we could narrow down the time period. Regards, 3 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...
Rob Russell Posted June 9, 2016 Share Posted June 9, 2016 I've found identical Gastropod steinkerns in the Silurian aged sugar creek formation in northern Illinois. 2 Finding my way through life; one fossil at a time. Link to comment Share on other sites More sharing options...
Guguita2104 Posted June 9, 2016 Share Posted June 9, 2016 Most of the geology of "West Central Illinois" is paleozoic. If we knew what county it was found in, we could narrow down the time period. Regards, So, I change my Id to gastropod. Link to comment Share on other sites More sharing options...
Rockwood Posted June 9, 2016 Share Posted June 9, 2016 I'm assuming so, Tony. Beyond that???? The diagnostic features are almost always on the outside of the shell. It looks like there is some concretion surrounding it. In hand you may be able to see enough external to make some comparisons if you can find references for the formation. 1 Link to comment Share on other sites More sharing options...
RockDaleCreek Posted June 10, 2016 Author Share Posted June 10, 2016 Men, thank you for your help! I really appreciate this. I thought the Geology was off, but any clues are better than none. That fossil is one of my favorites; I enjoy being closer to nailing down it's identity and I'm glad you all are along and helping Link to comment Share on other sites More sharing options...
kurdelmb Posted June 10, 2016 Share Posted June 10, 2016 Hormotoma Gastropod of some sort? In picture one it looks like much of the spiral is broken off. Just a thought. Link to comment Share on other sites More sharing options...
tmaier Posted June 11, 2016 Share Posted June 11, 2016 It reminds me of an operculum of a gastropod, but I don't know of a paleozoic one that is that large. http://www.google.com/search?q=operculum+gastropod&btnG=Search&hl=en&gbv=1&tbm=isch 1 Link to comment Share on other sites More sharing options...
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