Swmi Lake Michigan, ID? My guess.. chert or chalcedony with calcite or silica incision.. a seriously random wanna be guess.. : r/whatsthisrock
Fossils to a World War II-era dog tag: Exploring the interesting finds on Lake Michigan's shore | WUWM 89.7 FM - Milwaukee's NPR
Controversial Fossil Hints Homo sapiens Blazed a Trail Out of Africa Earlier Than Thought - Scientific American
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Lake Michigan Brachiopod? - Fossil ID - The Fossil Forum
Found in north central Indiana. Something fossilized in limestone, maybe some type of coral? : r/whatisthisthing
I found this very well fossilized jaw bone on the Nemaha river, in the southeast corner of Nebraska, my guess is it's a boar jaw, but I'm unsure : r/fossilid