Sedimentation pool, sludge pond in the mining area of ??the open pit mine, Erzberg mountain at Eisenerz, Styria, Austria, Europe

alpen alps austria daylight daytime day economies economy environment erzberg industries industry iron ores iron ore mines mine minings mining mountains mountain mud pool mud pots mud pot natural resource nobody open cast mining ores ore outdoors outside productions production raw materials raw material sedimentation basin settling basin settling pond steiermark styria Österreich