and North American (possibly) also: https://en.wikipedia.org/wiki/Old_Copper_complex https://en.wikipedia.org/wiki/Old_Copper_complex I'd expected older sites

and North American (possibly) also: https://en.wikipedia.org/wiki/Old_Copper_complex https://en.wikipedia.org/wiki/Old_Copper_complex I'd expected older sites elsewhere, but apparently parts of that complex predate copper workings elsewhere (and the Bronze Age (copper and tin metalworking)).