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Found in Mesa County, Colorado. This area has ammonites in shale and various mineral deposits. I think it is a septarian nodule but not sure. Is there the possibility it has an ammonite inside?

the ammonite was found in shale nearby for reference.









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See if it fluoresces in long or short wave UV light.


Ynot is correct.

My goal is to leave no stone or fossil unturned.   

See my Arizona Paleontology Guide    link  The best single resource for Arizona paleontology anywhere.       

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Septarian-nodule, this is what we can see

Some nodules contain fossils, so, no one knows whats inside..., perhaps you get one when you open it

Edited by rocket
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Nice example of septarian nodule.





Fossil hunting is easy -- they don't run away when you shoot at them!

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