Sizev_McJol Posted March 1, 2018 Share Posted March 1, 2018 Unfortunately I don’t have much useful detail to share with you here. I found this in Illinois at the bottom of a bridge filled with slabs of rock blasted from God-knows-what quarry. It other slabs like it contained fragments of brachiopod shells and calymene trilobites. It is about 4 1/2cm in diameter. My best guess was a jellyfish or something similar; a geologist whom I showed it to agreed, but honestly neither of us were at all confident in our assessment. Thoughts? Link to comment Share on other sites More sharing options...
sixgill pete Posted March 1, 2018 Share Posted March 1, 2018 I may be wrong, but I really do not believe that is a jellyfish. Jellyfish are soft bodied creatures, and fossil ones I have seen are more like imprints / impression type fossils. This seems to be something "hard" on the rock. But, I am by no means even vaguely familiar with these type of fossils. maybe @Nimravis can help. Bulldozers and dirt Bulldozers and dirt behind the trailer, my desert Them red clay piles are heaven on earth I get my rocks off, bulldozers and dirt Patterson Hood; Drive-By Truckers May 2016 May 2012 Aug 2013, May 2016, Apr 2020 Oct 2022 Link to comment Share on other sites More sharing options...
Fossildude19 Posted March 1, 2018 Share Posted March 1, 2018 From the texture, I would guess bryozoan. 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...
sixgill pete Posted March 1, 2018 Share Posted March 1, 2018 2 minutes ago, Fossildude19 said: From the texture, I would guess bryozoan. Looking at it again, I think you may be on to something Tim. Bulldozers and dirt Bulldozers and dirt behind the trailer, my desert Them red clay piles are heaven on earth I get my rocks off, bulldozers and dirt Patterson Hood; Drive-By Truckers May 2016 May 2012 Aug 2013, May 2016, Apr 2020 Oct 2022 Link to comment Share on other sites More sharing options...
Sizev_McJol Posted March 1, 2018 Author Share Posted March 1, 2018 10 minutes ago, Fossildude19 said: From the texture, I would guess bryozoan. Really? I have hundreds of bryozoans but never saw one like this. Wow. Any clue what kind? Link to comment Share on other sites More sharing options...
Herb Posted March 1, 2018 Share Posted March 1, 2018 I think it is a dasyclad sponge Receptaculitids "Absence of evidence is not evidence of absence"_ Carl Sagen No trees were killed in this posting......however, many innocent electrons were diverted from where they originally intended to go. " I think, therefore I collect fossils." _ Me "When you have eliminated the impossible, whatever remains, however improbable, must be the truth."__S. Holmes "can't we all just get along?" Jack Nicholson from Mars Attacks Link to comment Share on other sites More sharing options...
Nimravis Posted March 1, 2018 Share Posted March 1, 2018 The only jellyfishes that I know of in Illinois are those found a Mazon Creek, and this is definitely not from there. It does have a weird texture and I can see what @Herb and @Fossildude19 are seeing. Link to comment Share on other sites More sharing options...
abyssunder Posted March 1, 2018 Share Posted March 1, 2018 That's it, Herb. Receptaculitid. " We are not separate and independent entities, but like links in a chain, and we could not by any means be what we are without those who went before us and showed us the way. " Thomas Mann My Library Link to comment Share on other sites More sharing options...
Miocene_Mason Posted March 1, 2018 Share Posted March 1, 2018 13 minutes ago, Herb said: dasyclad sponge The “S” word! “...whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been and are being evolved.” ~ Charles Darwin Happy hunting, Mason Link to comment Share on other sites More sharing options...
Herb Posted March 1, 2018 Share Posted March 1, 2018 A couple common Illinois sponges, there are about a dozen kinds. "Absence of evidence is not evidence of absence"_ Carl Sagen No trees were killed in this posting......however, many innocent electrons were diverted from where they originally intended to go. " I think, therefore I collect fossils." _ Me "When you have eliminated the impossible, whatever remains, however improbable, must be the truth."__S. Holmes "can't we all just get along?" Jack Nicholson from Mars Attacks Link to comment Share on other sites More sharing options...
Sizev_McJol Posted March 1, 2018 Author Share Posted March 1, 2018 These are all good ideas. I will try to refine my search by looking for various corals from the area. Thank you all so much! If you have any other suggestions, please have at it! Link to comment Share on other sites More sharing options...
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