I went to "Horizon View" park today, a new spot I found on a drive yesterday. It was a very nice park, but as I found out from the park workers the "tot lot" section was only four years old. I did find a bit of clad and a older 1964 penny. Pennies were copper until 1982, then they became copper clad zinc from 82 onwards. You can really tell a "zinc" from the older pennies as they seem to dissolve and corrode a lot faster in the ground.
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