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50 feet Alaska amount argillites belt bench bodies calcite Canal Carboniferous chalcopyrite claims clay coal bed Coalton Coast Range conglomerate containing copper country rock Creek crosscut developed Devonian diabase dikes east epidote exposed extends feet elevation feet in length feet in width feet thick folded formation fossils galena gangue garnet geologic gold granite granodiorite greenstone head horizon inclosing intrusive Juneau Kasaan Kentucky Ketchikan Ketchikan district Kuiu Island lava limestone located Lower Elkhorn magnetite mainland marble masses massive metamorphism miles mineral mining Mountain mouth northwest occur Ohio open cuts outcrop Peninsula planes Prince of Wales prospects pyrite pyrrhotite quadrangle quartz quartz veins region reported ridge Russell Fork sand sandstone schists shaft shale shore shows side slates southeastern Alaska sphalerite strata striking structure sulphide surface Survey tide water tunnel vein deposits Wales Island Wrangell districts
Seite 206 - Portland cement. — Portland cement is produced by burning a finely ground artificial mixture containing essentially lime, silica, alumina, and iron oxide in certain definite proportions. Usually this combination is made by mixing limestone or marl with clay or shale, in which case the mixture should contain about three parts of the lime carbonate to one part of the clayey materials.
Seite 223 - No. 259. 1905, pp. 172-185. Geology and coal resources of Cape Lisburne region, Alaska, by AJ Collier. Bulletin No. 278, 1906, 54 pp. Topographic maps. Fort Yukon to Kotzebue Sound, reconnaissance map of; scale, 1:1200000: by DL Reaburn.
Seite 222 - Reconnaissances in the Cape Nome and Norton Bay regions, Alaska, in 1900,
Seite 223 - The gold placers of parts of Seward Peninsula, Alaska, including the Nome, Council, Kougarok, Port Clarence, and Goodhope precincts, by AJ Collier, FL Hess, PS Smith, and AH Brooks. Bulletin 328, 1908, 343 pp.
Seite 103 - Little Fork, Brush Fork, and Critches Creek, and in this district the acreage of cannel coal is not large, owing to its position very near the hilltops. It is, however, a valuable cannel coal, which will be worked in the future when cheaper transportation facilities are obtainable. CAT CREEK COAL (NO. 5). Extent and development. — The next lower coal is the most important coal in this district. It reaches its greatest thickness along Dry and Caney forks and Cherokee Creek and in the hilltops northwest...
Seite 19 - Conemaugh beds and it foots up 593 feet 2 inches from the base of the Pittsburg coal to the top of the Upper Freeport seam, which in this hole was found in 641 3 642 9 Depth.
Seite 91 - Losmalmgow cnnnel coal, represented by 100 (calculated on the basis of production of 13.000 cubic feet of pas and 1,535.5 pounds of sperm per ton. and having regard also to the value of secondary products and the cost of purification of the gas), the coal is equal to 111.23.
Seite 223 - TG Gerdine. Seward Peninsula, northwestern portion of, topographic reconnaissance of; scale, 1:250000; by TG Gerdine. Seward Peninsula, southern portion of, topographic reconnaissance of; scale, 1:250000; by TG Gerdine. In preparation. Water-supply investigations in Alaska, 1906 and 1907, by FF Henshaw and CC Covert.
Seite 221 - ... Alaska, by S. Paige and A. Knopf. Bulletin No. 327, 1907, 71 pp. Topographic maps. Kenai Peninsula, northern portion; scale, 1:250000; by EG Hamilton. Contained in Bulletin No. 277. Not published separately. Reconnaissance map of Matanuska and Talkeetna region; scale, 1:250000; by TG Gerdine and KH Sargent.