A mine workers examines frost crystals formed inside an abandoned working place of a copper mine in Kennecott, Alaska.
Mine workers eat food at a mess hall in a copper mine, Kennecott, Alaska. Man-cars operated on inclined shaft used to transport the miners.
Glacier mining is being done in Kennecott, Alaska. Copper ore is mined from a melting glacier using drag line scrapers.
View of a railroad bridge over a river in Kennecott, Alaska. Snow covered mountains in the background. View of a melting glacier. High speed water currents drifts through the mountains. A picturesque scene of the Alaskan Valley.
Large copper reserves in Arizona are mined by Caving System. Exteriors of a copper mine plant at Ray in Arizona, USA. View of the surface pit above the mine.
View of the main haulage tracks for ore cars inside a copper mine drift at Ray in Arizona, USA. The drifts branch off beneath the ore. A mine worker stands beside an ore car. Another miner climbs a ladder.
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