Preliminary report of the United States Geological Survey of Wyoming, and portions of contiguous territories : (being a second annual report of progress), under the authority of the Secretary of the Interior . nd one-half inches in thickness. Strike of vein northwest and southeast, withdip nearly perpendicular. Vein, like the Cariso, conforms with thegneissoid slates which form the wall rock, and which are supplantedtoward the surface by a porphyritic gneiss holding small quantities ofgold and overlying the vein, though not forming a true cap rock. Verysmall traces of pyrites are contained in
Preliminary report of the United States Geological Survey of Wyoming, and portions of contiguous territories : (being a second annual report of progress), under the authority of the Secretary of the Interior . nd one-half inches in thickness. Strike of vein northwest and southeast, withdip nearly perpendicular. Vein, like the Cariso, conforms with thegneissoid slates which form the wall rock, and which are supplantedtoward the surface by a porphyritic gneiss holding small quantities ofgold and overlying the vein, though not forming a true cap rock. Verysmall traces of pyrites are contained in both wall rock and quartz. Allgold, however, seems to be full. Seven tons per day of ore were beingtaken out by hand labor, ore averaging $20 per ton. Gold not so pureas that of Cariso, though very bright and easily amalgamated. A greatdeal of the gold is in flakes of considerable size, especially between thelamma of the quartz. The quartz is so soft that no blasting is good deal of moss agate occurs in the vein, noticeable when the quartzis clear. Miner^s Delight lime—Just west of preceding; the claims join. LodeIS the same, but pinches to an average width of two feet. Vein stopped Fig. Dyke, near Central City, GEOLOGICAL SURVEY OF THE TERRITORIES. 179 down eighty-five feet, ore averaging $35 per ton. Mine not in opera-tion at present, as buildings and machinery are in course of superintendent expects to take out fifteen tons per day. Young Canadian Mine—One-quarter of a mile west of the sunk eighty feet through barren lode before reaching pay streak,which was struck only two or three days before the mine was visited. Theore had not been assayed, but was pronounced by all miners in the vicin-ity to far exceed in richness any ore yet discovered in the neighborhood. THE COALS OP THE ROCKY MOUNTAINS.* The coals of the portion of our continent lying west of the MissouriEiver are only just beginning to attract that attention which thei
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