|
gptkb:The_Copper_Country
|
1960s
|
|
gptkb:Negaunee_Iron_Ore_Range
|
mid-20th century
|
|
gptkb:Durham_coalfield
|
20th century
|
|
gptkb:Jinguashi
|
1987
|
|
gptkb:Copper_Country
|
1960s
|
|
gptkb:South_Yorkshire_coalfield
|
late 20th century
|
|
gptkb:Warwickshire_coalfield
|
20th century
|
|
gptkb:Gogebic_Range
|
mid 20th century
|
|
gptkb:Copper_Basin
|
1980s
|
|
gptkb:Bristol_coalfield
|
20th century
|
|
gptkb:Lake_Superior_Iron_Ranges
|
late 20th century
|
|
gptkb:Tri-State_Mining_District
|
1960s
|
|
gptkb:Derbyshire_coalfield
|
late 20th century
|
|
gptkb:Schneeberg_mining_region
|
20th century
|
|
gptkb:Ducktown_Basin
|
1980s
|
|
gptkb:Shafter,_Texas,_United_States
|
1942
|
|
gptkb:Yudnamutana_region
|
early 20th century
|
|
gptkb:Bergslagen_mining_region
|
20th century
|
|
gptkb:Silver_Reef_Ghost_Town
|
late 1880s
|
|
gptkb:Lake_Superior_copper_district
|
1960s
|