LuckyPoire

LuckyPoire t1_j7dcs3l wrote

Since metal detection was invented I think metal has been preferred to rock for that reason.

But I think you are right that older markers were generally stone.

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LuckyPoire t1_j7d1obq wrote

I don't know if its traditional, but lead is basically the least reactive (corroding) non-precious metal. So for applications where metal needs be buried in the ground for a long time, lead is a pretty good candidate for those unconcerned with soil toxicity.

Copper is another but its generally more expensive than lead for non-decorative monuments. Unsecured metal tends to get re-appropriated for other purposes...especially when stored in an inherently insecure place like a property line.

Nowadays, steel meets all the demands without poisoning the salamanders.

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