North Dakota Mystery Find

Pseudo Fossil, Unknown fossil
May 022011
Strange formation discovered in North Dakota.

"I found this on my uncles ranch in the Badlands of North Dakota. Took to a fossil place and they cleaned it up. High pressure air, its not sand stone, but hard as a rock and heavy. There might have been a inland sea here at one time. We find flat rocks with sea fossils in them also. This fossil has rings in the stone almost looks like layers."

Note: MyFossilFind tends to think that this  is a mineral formation, but we are not sure what kind. Is anyone familiar with this sort of find whether fossil or mineral? Please leave a comment and help us to identify it!

Location: North Dakota

Fossil Collector: Kent S.

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