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adjacent altered amounts appears average banded beds belt bodies Brooks Canal Carboniferous chalcopyrite claims Cleveland Coast Range conglomerates considerable consist containing copper country rock deposits developed Devonian dikes district east elevation evidence exposed extended faulting feet folded formations fossils galena Geol geologic gold granite greenstone head important includes indicated Inlet intrusive Island Juneau Ketchikan later lava length less limestone localities located lower mainland marble masses metallic metamorphism miles mineral mining mountain nearly noted observed occur Peninsula places planes portion present Prince of Wales principal probably production prospects pyrite quartz veins region represented River rock schists shaft shore showing side similar slates Sound southeastern Alaska strata strike structure sulphide surface Survey tunnel upper usually values varies vein Wales Island wide width Wrangell
Page iv - A reconnaissance of the Cape Nome and adjacent gold fields of Seward Peninsula, Alaska, in 1900, by AH Brooks, GB Richardson, and AJ Collier. In a special publication entitled "Reconnaissances in the Cape Nome and Norton Bay regions, Alaska, in 1900,
Page 200 - 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.
Page iii - No. 259, 1905, pp. 151-171. •Gold placers of Turnagain Arm, Cook Inlet, by FH Moffit. In Bulletin No. 259, 1905, pp. 90-99. Mineral resources of the Kenai Peninsula: Gold fields of the Turnagain Arm region, by FH Moffit, pp. 1-52; Coal fields of the Kachemak Bay region, by R.
Page 21 - The two latter lie without the region under discussion, and will not be further considered. The so-called Coast range extends from near the boundary of Washington northward through British Columbia into southeastern Alaska.
Page 68 - In other words, the inland rocks were then above the zone of deep-seated metamorphism or rock flowage and were therefore profoundly affected by the invading intrusives and accompanying pneumatolytic solutions. Furthermore, the mineral-bearing solutions emanating from the granite encountered new conditions of temperature and pressure on entering the adjacent sedimentary rocks and deposited, as supersaturated solutions in their new environment, a portion of their dissolved contents, especially the...
Page 68 - Well-defined ore bodies have been found near the granite contact. The geologic interpretation of these data indicates clearly that the rocks east of the massifs were less deeply buried at the time of intrusion than those on the coastal side. In other words, the inland rocks were then above the zone of deep-seated metamorphism or rock flowage and were therefore profoundly affected by the invading intrusives and accompanying pneumatolytic solutions.
Page iv - Bulletin 314, 1907, pp. 187-204. The Yukon-Tanana region, Alaska; description of the Fairbanks and Rampart quadrangles, by LM Prindle, FL Hess, and CC Covert. Bulletin 337, 1908, 102 pp.
Page v - ) Coal fields of the Cape Lisburne region, by AJ Collier. In Bulletin 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. Contained in Professional Paper No. 10. Not published separately. Koyukuk River to mouth of Colville River, including John River; scale, 1:1200000; by WJ Peters. Contained in Professional Paper...
Page v - Topographic maps. The following maps are for sale at 5 cents a copy, or $3 per hundred: Casadepaga Quadrangle, Seward Peninsula; scale, 1:62500; by TG Gerdine. Grand Central Special, Seward Peninsula; scale, 1:62500; by TG Gerdine. Nome Special, Seward Peninsula; scale, 1:62500; by TG Gerdine. Solomon Quadrangle, Seward Peninsula; scale, 1:62500; by TG Gerdine.