AstroRaptor56 Posted July 25, 2020 Share Posted July 25, 2020 I headed out to Mazon Creek IL a few days ago and came back with some fair nodules. I found a big nodule(6) and used the freeze thaw method to open it, I think it might be a jellyfish but I’m unsure, as I guess it could be nothing. 1 and 2 just have irregular shapes and I believe are made of pyrite. 3,4 and 5 are nodules that did not open from freeze thaw so I broke them with a hammer, and they have some white marks but I’m not sure if they are anything at all. Help with any of these finds would be awesome, and I had quite the adventure at Mazon as it rained and was quite filled with ticks! Link to comment Share on other sites More sharing options...
Rob Russell Posted July 25, 2020 Share Posted July 25, 2020 Your big one is indeed a essexella jellyfish. The two on the left look like pyrite, or ironstone, nodules, IMO. It’s all a bit blurry. 1 Finding my way through life; one fossil at a time. Link to comment Share on other sites More sharing options...
connorp Posted July 25, 2020 Share Posted July 25, 2020 6 is a nice Essexella. 3, 4, and 5 are nodules with pyrite inside. They are fairly common but sometimes you can find cool shapes. 2 looks like a pyrite "ball". I have found some in a quarry that exposes the Francis Creek Shale (where the Mazon Creek fossils come from) and both overlying and underlying strata. I'm not positive what layer they come from. I don't know about 1. 1 Link to comment Share on other sites More sharing options...
GeschWhat Posted July 25, 2020 Share Posted July 25, 2020 I can't tell for sure from the photo, but #1 looks like it could be a spiral coprolite. Could I see a closeup at different angles (on a plain surface)? 1 Lori www.areallycrappystory.com/fossils www.facebook.com/fossilpoo Link to comment Share on other sites More sharing options...
AstroRaptor56 Posted July 25, 2020 Author Share Posted July 25, 2020 9 hours ago, GeschWhat said: I can't tell for sure from the photo, but #1 looks like it could be a spiral coprolite. Could I see a closeup at different angles (on a plain surface)? Hello! Here are some more angles, I looked at it closer and it definitely does spiral up, I’m quite sure that it’s made of pyrite, but I don’t know if coprolite is ever in a pyrite form Link to comment Share on other sites More sharing options...
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