How do I know if we have mineralized soil?

[Coinstriking Michigan]

I always wondered how people know they have mineralized soil. Is there a way of checking, is it certain parts of the country? I've always noticed it's rare to find coins deeper than 6-7 inches in the Upper Penninsula of Michigan and was wondering if that could be the cause.

 

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[Terry Soloman]

I always wondered how people know they have mineralized soil. Is there a way of checking, is it certain parts of the country? I've always noticed it's rare to find coins deeper than 6-7 inches in the Upper Penninsula of Michigan and was wondering if that could be the cause.

One real easy way is to take a rare-earth magnet and rub it around in the ground you are detecting. When it comes up covered in dark magnetic heavies, it's a good bet the ground is heavily mineralized. Red earth. Red = oxidation. Most dropped modern coins, 1899-now, are found 0"-8" deep everywhere, not just in heavy soil. Research it more Farscape, these are just simple tests. - Terry