Fossils and Modern Humans

[guohua]

I recall when I was a kid finding a fossil in northeast Ohio that had a metal machine screw embedded in the rock, about a #8 machine screw. It was about an inch or so of the shank broken off below the head of the screw. Never did figure out how it go into the rock, but it was there when I split the rock open, and there wasn't any bore-hole leading in to it.

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That must have been a very interesting find.