The American Journal of ScienceJ.D. & E.S. Dana, 1907 - Earth sciences |
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Common terms and phrases
actinolite albite ammonium amount amphibole analysis animals appear Aucella beds biotite calcium Cambrian carbonate cent chemical clay color containing Creek Cretaceous crystals deposits described developed Devonian dikes Dothan Eozoic ester facetted pebbles fauna feet feldspar ferric figures fluorine formation fossils Galice genus Geol Geological Survey given glacial gneiss H₂O helium hornblende hydrochloric acid hydrogen igneous iron JOUR Journal Jurassic Lake limestone locality lower magnesium magnesium carbonate mass material matrix method mineral molar mountain Museum natural nephelite observed obtained occur operculum oxide Paleozoic paper plates pre-Cambrian precipitated present Professor pyrochlore quartz ratio rays region riebeckite River rocks salts sandstone schists sea-water septa shales shown solution species specimens strata structure succinic acid sulphate surface syenite temperature Thorianite tion Triassic tube upper Uraninite valley veins Vermilia volume wing writer
Popular passages
Page 78 - It is the purpose of the present paper to show that the above requirements are practically fulfilled by lead and by helium also, in so far as the gaseous nature of the latter element will permit of its retention in the minerals. The suggestion that lead was one of the final (inactive) disintegration products of uranium was first made by the writer in a paper presented before the New York Section of the American Chemical Society on February 10, 1905.
Page 73 - In the multicellular animal, especially for those higher reactions which constitute its behaviour as a social unit in the natural economy, it is nervous reaction which par excellence integrates it, welds it together from its components, and constitutes it from a mere collection of organs an animal individual.
Page 413 - ... that the ratio of the sines of the angles of incidence and refraction is constant for refraction in the same medium, was effected by Snell and Descartes.
Page 71 - The Fossils of the Silurian (Upper Silurian) rocks of Keewatin, Manitoba, the North Eastern shore of lake Winnipegosis and the lower Saskatchewan River. 6. The Canadian species of Plectoceras and Barrandeoceras. 7. Illustrations of seven species of fossils from the Cambrian, Cambro-Silurian and Devonian rocks of Canada.
Page 113 - Eozoic seon of dominantly soft-bodied animals and the post-Cambrian son of dominantly lime-secreting animals. The notable fossilization of brachiopods, trilobites, molluscs, etc., was impossible until near the beginning of Cambrian time. Indeed, the conditions for truly abundant fossilization of calcareous forms were not established until after the Cambrian period. The striking...
Page 83 - Preliminary account of Goldfield, Bullfrog, and other mining districts in southern Nevada, by FL Ransome, with notes on the Manhattan district, by GH Garrey and WH Emmons.
Page 66 - Martin. 1906. 36 pp., 5 pis. WS 164. Underground waters of Tennessee and Kentucky west of Tennessee River and of an adjacent area in Illinois, by LC Glenn.
Page 229 - Alternating wet and dry seasons. "2. Their restriction in altitude is only apparent. Their present lines of altitude merely mark ancient or existing basin floors or plains. "3. They are derived from mineralized solutions brought to the surface by capillarity, and are essentially replacements (either mechanical or metasomatic) of soil or of rock decomposed in situ, or of both.
Page 151 - If the vanadium is disregarded, the ironnickel sulphide has the formula (FeNi)S2, with iron to nickel as 1.70 to 1, or nearly 5 to 3. A pyrite with such a high proportion of nickel is unknown. But a single one of the analyses quoted in Hintze's Handbook of Mineralogy shows anywhere near 6 per cent, nickel; this one, however, showing also about 3 per cent, of cobalt. The nearest approach to the present case is seen in the mineral gunnarite, 3FeS2, 2NiS, incompletely described by Lanstrom with density...
Page 185 - ... consolidated sands, clays, marls, etc., in part of colors unknown to the drift, and probably representing Tertiary strata underlying the drift and filling deep depressions or valleys in the harder formations or true bed rocks of the region. The artesian well of N. Ward & Co., on Spectacle Island, 560 feet deep, passed through at least 360 feet of unconsolidated material, only part of which could be regarded as glacial drift ; and the deep well at the corner of High and Purchase streets in Boston,...