Bulletin of the United States Geological SurveyThe Survey., 1909 - Geology |
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Alaska Alaska Peninsula amount August auriferous beach bed rock bench Bonanza Bulletin canyon carried Casadepaga cents chalcopyrite Chignik Bay claims coal field Cook Inlet cost country rock Creek at mouth creek gravels deposits depth discharge Discovery ditch drainage area drainage basin dredge east elevation Fairbanks district feet flows Fork Ganes Creek geologic Glacier greenstone ground Gulch head Herendeen Bay inches Innoko intake Iron Creek Island July Kigluaik Mountains Kougarok Kruzgamepa Lignite limestone localities located lode lower mining mountains Nome occur operations Ophir Creek outcrops pay streak peat placer gold placer mining Prince William Sound probably production prospecting pyrrhotite quartz reconnaissance region reported schists season second-feet September Seward Peninsula shaft shales shore side slate sluicing square miles stream sulphides summer surface Survey thickness tion topographic tributaries tunnel U. S. Geol Unga Island upper Valdez valley values veins winter Yukon zone
Popular passages
Page 354 - Second-feet per square mile" is the average number of cubic feet of water flowing per second from each square mile of area drained, on the assumption that the run-off is distributed uniformly both as regards time and area. "Run-off in inches...
Page 401 - Reconnaissances in the Cape Nome and Norton Bay regions, Alaska, in 1900,
Page 354 - Survey. arising from its use, it has been defined by law in several States. The California miner's inch is in most common use in the United States and was defined by an act approved March 23, 1901, as follows: "The standard miner's inch of water shall be equivalent or equal to 1$ cubic feet of water per minute, measured through any aperture or orifice.
Page 354 - Run-off in inches" is the depth to which the drainage area would be covered if all the water flowing from it in a given period were conserved and uniformly distributed on the surface. It is used for comparing run-off with rainfall, which is usually expressed in depth in inches. "Acre-foot...
Page 401 - No. 259. 1905, pp. 172-185. Geology and coal resources of Cape Lisburne region, Alaska, by AJ Collier. Bulletin No.
Page 304 - Creek bears three names in different parts of its valley; thus from its mouth to Left Fork, a distance of 7 miles, the stream is called Iron Creek; above Left Fork as far as Eldorado Creek, a distance of 1 mile, it is called Dome Creek, and from Eldorado Creek to the divide it is called Telegram Creek. This confusion of names is due to the interpretation of the mining laws which permits the staking of additional claims on different creeks — ie, creeks having different names. There are four main...
Page 354 - Second-foot" is an abbreviation for cubic foot per second and is the unit for the rate of discharge of water flowing in a stream 1 foot wide, 1 foot deep, at a rate of 1 foot per second. It is generally used as a. fundamental unit from which others are computed by the use of the factors given in the following table of equivalents. "Second-feet per square mile...
Page 162 - From the meager data at hand it is perhaps unsafe to venture on generalizations, yet it is probable that the quartz veins are genetically related to the intrusion of the post-Carboniferous quartz diorites and that, therefore, the intruded areas are those most likely to be mineral bearing. Such areas are known to occur throughout the Nutzotin Mountains at a number of localities, especially along the northeastern flanks. Brooks has mapped a large area of granular intrusive on the lower Nabesna. It...
Page 156 - An extensive contact zone has been produced along the junction of the diorite and the massive limestone exposed on the ridge west of Copper Pass. Various contactmetamorphic rocks, pyritiferous as a rule, are present in this zone, and these rocks on oxidizing give rise to large iron-stained outcrops, which contrast strongly with the surrounding white limestone. In connection with the discussion of the contact-metamorphic deposits it may be stated that the writers were shown some specimens of copper...
Page 14 - Peninsula is exceedingly complex, and though its general features have already been determined and the results published,0 progress has been but slow in deciphering the details of structure and stratigraphy. These problems have an important bearing on the distribution and occurrence of the mineral deposits, especially of metalliferous lodes. During 1908 two parties were engaged in detailed stratigraphic studies in this region. One of these, in charge of PS Smith, spent the summer in completing the...