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Mystery Fossil Need ID
dbrake40 posted a topic in Fossil IDThis ‘fossil’ was found on a river gravel bar in Southern Minnesota. Sedimentary layers in the area include Wisconsin lobe glacial till and cretaceous mudstone/sandstone. The centre of this specimen seems to be just sedimentary material that is slightly harder than the surrounding material filling the core. The outer shell seems to be rock. I am totally stumped. eems to be rock. I am totally stumped.