Results: 1 - 2 of 2
Dec 16, 1972
Open File Report
… ranging from 0 (i.e. at the surface) to 10,000 feet. Although … by conventional underground and surface mining techniques. This constitutes …
Dec 31, 1978
Bulletin
… fault are approximately at land surface, but decline eastward to … of 10-6 to 10-4 cm/sec. Surface mining ventures will generally …