Congressional Serial SetU.S. Government Printing Office, 1907 Reports, Documents, and Journals of the U.S. Senate and House of Representatives. |
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acid Alaska aplite basin bed rock biotite biotite granite Bull Bulletin calcite calcium Cambrian carbonate Carboniferous cement cent chloride chlorite clay cm³ coal coarse color conglomerate consists contains copper County Creek crystals cupric sulphate deposits depth diabase dike diorite district east epidote feet thick feldspar formation geology gold grains grams granite granite porphyry gravels gray green schist hematite Hill hornblende igneous inches iron Island joints lime limestone magnetite mass mica microcline microgranite miles Mineral Resources mining Mountain muscovite Nome occur oligoclase orthoclase outcrop oxide pay streak pegmatite places porphyry potash feldspar potassium pre-Cambrian probably pyrite quadrangle quarry quartzite reconnaissance region Rept ridge rift River Rock structure salt sand sandstone schist seam Seward Peninsula shale sheets shows silicates smoky quartz soda-lime feldspar solution stone stream surface tremolite U. S. Geol valley vein vertical
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Seite 234 - The interaction between minerals and water solutions, with special reference to geologic phenomena, by EC Sullivan.
Seite 197 - ... (2) Monographs, (3) Professional Papers, (4) Bulletins, (5) Mineral Resources, (6) Water-Supply and Irrigation Papers, (7) Topographic Atlas of United States — folios and separate sheets thereof, (8) Geologic Atlas of the United States — folios thereof.
Seite 104 - The quarry, opened in 1865, measures 300 feet from north to south and 200 feet from east to west and ranges in depth from 10 to 50 feet. It is drained by occasional pumping. The stripping consists of 2 to 3 feet of drift. Rock structure: The sheets, from 3 to 8 feet in thickness, dip 10° W.
Seite 180 - QUARRY. One in which the joints are either so close or so irregular that no very large blocks of stone can be quarried. CHANNEL. A narrow artificial incision across a mass of rock, which, in the case of a granite sheet, is made either by a series of contiguous drill holes or by blasting a series of holes arranged in zigzag order. CLEAVAGE, when applied to a mineral, designates a structure consequent upon the geometrical arrangement of its molecules at the time of its crystallization.
Seite 25 - ... sketches, made from a surface running at right angles to the rift, shows quartz and feldspar grains traversed by a generally parallel set of lines corresponding to the rift planes. The lines are more numerous in the feldspar than in the quartz grains. The other sketch, made from another specimen, shows besides the rift lines another less pronounced set intersecting these at right angles. This second set corresponds to the grain. Whittle calls attention to the fact that notwithstanding the marked...
Seite 164 - Sands and some clay are inU-rbedded with the stream gravels, forming, however, but a small percentage of the bulk of the alluvium. In all the smaller streams and in parts of the larger ones a bed of clay or sandy clay, in which more or less vegetable matter is intermingled, forms the topmost layer. This surface bed, which is called
Seite 37 - It occurs both at the top and at the bottom of the sheet, through a maximum thickness of 6 inches. It is coextensive with the discoloration known as " sap " and occurs at many places near vertical joints. Under the microscope this structure proves to consist of minute, nearly parallel fissures, of no great continuity, which traverse the mineral particles and which in the thin section examined are especially conspicuous in the quartz and the mica. The distance between these fissures measures from...
Seite 53 - Vinalhaven, 20 feet below the surface in the face of the quarry there is a bed of granite sand 18 inches thick between two sheets, which at that point dip about 10° into the hill. On the southeast side of the Longfellow quarry, near Hallowell, some of the' sheets within a wide heading include granite sand beds 10 inches thick.
Seite 180 - Fine-grained granite, usually occurring in dikes and containing little mica and a high percentage of silica. BASIC. A term applied to rocks in which the iron-magnesia minerals and feldspars with lime and soda predominate, such as diabase or basalts.
Seite iv - PP 28. The superior analyses of igneous rocks from Roth's tabellen, 1869 to 1884, arranged according to the quantitative system of classification, by HS Washington.