Lake Superior copper district

GPTKB entity

Predicate	Object
gptkbp:instanceOf	gptkb:cryptocurrency
gptkbp:archaeologicalSignificance	prehistoric copper mining
gptkbp:culturalHeritage	Finnish-American community Cornish-American community
gptkbp:featureType	gptkb:Midcontinent_Rift_System
gptkbp:historicalSignificance	oldest metal mining region in North America
gptkbp:knownFor	native copper deposits
gptkbp:locatedIn	gptkb:Michigan gptkb:United_States
gptkbp:locatedOn	gptkb:Keweenaw_Peninsula
gptkbp:majorCity	gptkb:Houghton gptkb:Calumet
gptkbp:majorMine	gptkb:Quincy_Mine Calumet and Hecla Mine Copper Falls Mine
gptkbp:mineralProduced	copper
gptkbp:miningDeclined	1960s
gptkbp:miningMethod	underground mining open pit mining
gptkbp:miningStarted	1840s
gptkbp:nearby	gptkb:Lake_Superior
gptkbp:notableCompany	gptkb:Calumet_and_Hecla_Mining_Company gptkb:Copper_Range_Company gptkb:Quincy_Mining_Company
gptkbp:partOf	gptkb:Copper_Country
gptkbp:touristAttraction	gptkb:Keweenaw_National_Historical_Park gptkb:A.E._Seaman_Mineral_Museum gptkb:Quincy_Mine_Hoist
gptkbp:bfsParent	gptkb:Quincy_Mine
gptkbp:bfsLayer	7
https://www.w3.org/2000/01/rdf-schema#label	Lake Superior copper district