Astano, the Astilleros Espanoles offshore construction yard, has sent off Discoverer Spirit to American owner and operator Transocean Offshore. The second of a trio of ultradeep waters dual-drilling ...
Ajo, in western Pima County 125 miles west of Tucson, has one of Arizona’s best-known porphyry copper deposits. It enticed small mining operations by the San Francisco syndicate known as the American ...
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