Mrteacherdude Posted January 24, 2015 Posted January 24, 2015 This is a mazon concretion from Braceville. Concretion is 2 1/2 by 3 inches. I can't make out much below the "neck" area.
RoadcutHannah Posted January 24, 2015 Posted January 24, 2015 I'm not really seeing a fossil here at all... "The woods are lovely, dark, and deep, But I have promises to keep, And miles to go before I sleep, And miles to go before I sleep." -Robert Frost
Missourian Posted January 24, 2015 Posted January 24, 2015 If a eurypterid, a low light angle should bring out some details. Context is critical.
Rockwood Posted January 24, 2015 Posted January 24, 2015 I think you would have to push their temporal range up quite a ways to get there wouldn't you ?
Rockwood Posted January 24, 2015 Posted January 24, 2015 I think you would have to push their temporal range up quite a ways to get there wouldn't you ? 'us yes 'ids no
jgcox Posted January 24, 2015 Posted January 24, 2015 Not seeing anything that resembles a Euryriptide.
RCFossils Posted January 24, 2015 Posted January 24, 2015 I am not seeing a fossil either. Mazon Creek eurypterids are extremely rare and only found in the Braidwood (freshwater) portion of the deposit. The Braceville spoil pile is in the Essex (marine) portion of the deposit. 1
fossilized6s Posted January 24, 2015 Posted January 24, 2015 Also Eurypterids had hard bits mostly, so their structure preserves quite nicely and would be easy to see. 1 ~Charlie~ "There are those that look at things the way they are, and ask why.....i dream of things that never were, and ask why not?" ~RFK ->Get your Mosasaur print ->How to spot a fake Trilobite ->How to identify a CONCRETION from a DINOSAUR EGG
Malcolmt Posted January 24, 2015 Posted January 24, 2015 Having seen a few eurypterids , I really am not seeing anything there that resembles anything that could be from a eurypterid. Really looks like a bit of staining to me.
Mrteacherdude Posted January 24, 2015 Author Posted January 24, 2015 Thanks all. It makes sense hard body parts would preserve better than this. I'm going to rethink how I title things as Eurypterid specialists took their time to analyze something that was merely a guess. As for it being nothing at all. While being poorly preserved, the discoloration and paired circles in the upper 1/3 are too suspicious for me to totally give up on.
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