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Yellow boy in a stream receiving acid mine drainage from surface coal mining
Yellow boy in a stream receiving acid mine drainage from surface coal mining
Phosphogypsum stack located near Fort Meade, Florida. These contain the waste byproducts of the phosphate fertilizer industry.
Phosphogypsum stack located near Fort Meade, Florida. These contain the waste byproducts of the phosphate fertilizer industry.
Red mud near Stade (Germany)
Red mud near Stade (Germany)
Bauxite, an aluminium ore (Hérault department, France). The reddish colour is due to iron oxides that make up the main part of the red mud.
Bauxite, an aluminium ore (Hérault department, France). The reddish colour is due to iron oxides that make up the main part of the red mud.
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A set of Cornish stamps
A set of Cornish stamps
Froth flotation cells used to concentrate copper and nickel sulfide minerals
Froth flotation cells used to concentrate copper and nickel sulfide minerals
Screening ore through a sieve, Fixed Nitrogen Research Laboratory, 1930
Screening ore through a sieve, Fixed Nitrogen Research Laboratory, 1930