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Based In mesa, Arizona, The outcrop is a Blog by richard leveille.
The Outcrop
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All tagged
mining history
Dec
20
Dec 20
The Future of the Southwestern North America Copper Industry
Richard Leveille
Dec
20
Dec 20
Death and Resurrection of Mining: 1967-2018
Richard Leveille
Dec
19
Dec 19
Electrification, Demand Explosion and Mass Production: 1886-1967
Richard Leveille
Dec
19
Dec 19
Anglo Invasion and Discoveries: 1848-1886
Richard Leveille
Dec
16
Dec 16
Copper Mining Prior to 1848
Richard Leveille
Dec
13
Dec 13
Geological Background
Richard Leveille
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