Mineral resources . Detail of structurs on eastern limit of Boppy levels. Detail of structure on easternlimits of Boppy Lode. Upper levels. (2) The Distribution of the Commercial Ore. (a) Eastern Limb.—Near the surface the stone has been removed for alength of about 1,350 feet, as measured along the lode. The lengths of theore as exposed in a continuous body along the eastern limb on Nos. 1,2, 3, 4, 5, and 6 levels are approximately 1,300, 1,125, 820, 520, 340, and 300feet respectively. The length measured along the No. 7 level is comparablewith that found along No. 6 level. (b) Wes
Mineral resources . Detail of structurs on eastern limit of Boppy levels. Detail of structure on easternlimits of Boppy Lode. Upper levels. (2) The Distribution of the Commercial Ore. (a) Eastern Limb.—Near the surface the stone has been removed for alength of about 1,350 feet, as measured along the lode. The lengths of theore as exposed in a continuous body along the eastern limb on Nos. 1,2, 3, 4, 5, and 6 levels are approximately 1,300, 1,125, 820, 520, 340, and 300feet respectively. The length measured along the No. 7 level is comparablewith that found along No. 6 level. (b) Western Limb.—A study of the workings on the western limb leadsto the conclusion that the western limb is much less important, as an oreproducer, than the eastern one. An examination of the longitudinal sec-tion accompanying the report illustrates this point and shows, moreover,how the ore body, to the west, disappears rapidly with increasing distancefrom the trough. (c) The Trough.—This portion of the mine has b
Size: 1760px × 1419px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectminesandmineralresou
