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TheGoblinKing

ID on a fossil from Decorah Formation, MN

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TheGoblinKing

20200220_135249.thumb.jpg.42aecc84c88708479d17be220fdf2b4f.jpg20200220_135332.thumb.jpg.d020ec4c9c7e54a3e1aebe24394e0194.jpg20200220_135304.thumb.jpg.acabf07d38a931e4e178959f3ecd4006.jpg20200220_135514.thumb.jpg.682b5489313c2f7c83d308002f138b9c.jpg20200220_135536.thumb.jpg.a33e6d25052c08bbb9e62442b25ccf06.jpgI found this plate near in the upper decorah formation Minnesota (Ordovician period limestone).

These chunks are frequently littered with trilobite bits and fragments but this lookk a little odd to me. It has a "knob" or bump structur on one side and a gradual bend on the other. Its still partially covered by coral and debris but most of it is exposed. Any ideas? :)

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mikeymig

Looks like the genal spine to a trilobite like Ceraurus. 

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