Rock tailings from vertical gold mine in Colorado, USA
Schlüsselwörter
debris,
industrial,
colorado,
mining,
america,
background,
colorado springs,
construction,
conveyer,
crusher,
crushing,
denver,
dirty,
dump,
environment,
equipment,
geology,
gold,
gravel,
heavy,
historic,
industry,
lost,
machine,
machinery,
material,
material,
mine,
mountain,
mountain,
old,
ore,
outdoors,
peak,
pit,
pollution,
processing,
quarry,
raw,
rock,
rough,
scenic,
shaft,
sorting,
stone,
tour tourism,
travel,
truck,
us
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