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Based In mesa, Arizona, The outcrop is a Blog by richard leveille.
The Outcrop
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Aug
11
Aug 11
References
Richard Leveille
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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