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A method for surveying drill holes by oriented drill rods

North Carolina mica spots :Mitchell, Macon, Gaston, and Yancey Counties

Investigation of the Virgilina copper district, Virginia and North Carolina

Published Year

• 1940-1949 (3) *

Subject

• Boring (1)
• Copper ores--North Carolina (1)
• Copper ores--Virginia (1)
• Drill pipe (1)
• Mica--North Carolina (1)
• Ore deposits--North Carolina (1)
• Prospecting (1)

Author

• Dahners, L. A. (3) *
• Cohen, C. J. (2)
• McIntosh, F. K. (1)
• Newberry, A. W. (1)
• Robertson, Almon F. (1)
• Roos, Alford (1)

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