Olla varaa Ote ylimääräinen champion mine michigan mindat erilaisuus Nyt lämpötila
Photo Gallery: Champion Mine, Champion, Marquette County, Michigan, USA
Champion Mine (Champion Consolidated Quartz Mine; Champion Con Qtz; Champion Fraction Lode), Nevada City, Nevada City Mining District, Nevada County, California, USA
Michigan Mining Tour
Copper mining in Michigan - Wikipedia
Champion Mine, Champion, Marquette County, Michigan, USA