Trilobite? Lacking Distictive Features

[Mike from Red Wing]

The fossil was collected on the Deer River near Spring Valley, Minnesota.  It is shaped like a trilobite, but it doesn't have any distinctive features, as the shell is mostly smooth.  It somewhat resembles a shark tooth, but were no fish at this time. The width of the fossil is about 17 mm.

 

 

 

 

 

 

 

 

[LiamL]

Looks more like a shell to me.