The Journal of Geology, 21. köideThomas Chrowder Chamberlin University of Chicago Press, 1913 Vols. for 1893-1923 includes section: "Reviews." |
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Page 2
... considerable depths . The mechanism of this downward migration has been discussed by many writers . Near the surface , some have supposed , the silver was dissolved by sul- phate solutions , others have regarded chloride waters as ...
... considerable depths . The mechanism of this downward migration has been discussed by many writers . Near the surface , some have supposed , the silver was dissolved by sul- phate solutions , others have regarded chloride waters as ...
Page 26
... proximity to the surface will depend on the rapidity with which this reduction goes If reduction be slow , native silver may thus be formed even on . at considerable depths . Native silver so precipitated will be 26 H. C. COOKE.
... proximity to the surface will depend on the rapidity with which this reduction goes If reduction be slow , native silver may thus be formed even on . at considerable depths . Native silver so precipitated will be 26 H. C. COOKE.
Page 27
Thomas Chrowder Chamberlin. at considerable depths . Native silver so precipitated will be com- paratively stable in the presence of earth waters . Acids will not attack it in the absence of oxygen , since the solution pressure of ...
Thomas Chrowder Chamberlin. at considerable depths . Native silver so precipitated will be com- paratively stable in the presence of earth waters . Acids will not attack it in the absence of oxygen , since the solution pressure of ...
Page 38
... considerable success . The country is almost entirely without roads , but there are a great many Igorot trails which do not take any advantage whatever of the topography . The government , however , is building a horse trail which ...
... considerable success . The country is almost entirely without roads , but there are a great many Igorot trails which do not take any advantage whatever of the topography . The government , however , is building a horse trail which ...
Page 39
... considerable stretch of alluvial running from Subig northwest to San Narciso . This stretch of country here is very dry in certain seasons , and owing to the composition of the soil the water sinks in rapidly and the whole appearance of ...
... considerable stretch of alluvial running from Subig northwest to San Narciso . This stretch of country here is very dry in certain seasons , and owing to the composition of the soil the water sinks in rapidly and the whole appearance of ...
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Common terms and phrases
acid albite alkalies andalusite andesite Angistorhinus argillite augite basalt basin beds black shale Blue shale bowlders Bull calcareous Cambrian cent chemical chloride Cobalt series composition conglomerate Creek crystalline crystals deposits diabase diorite district dolerite dolomite east equilibrium erosion evidence feet feldspar ferric flat formation fossil gabbro glacial Glacier gold grains granite gravel greywacke hornblende Huron Huronian igneous rocks intrusion Jour K₂O Karroo laccolite Lake later layers lime limestone lower Luzon magma material metamorphism miles minerals Mountain occur olivine Onondaga oölites original oxides pantellerite pebbles peneplain phase plagioclase plain precipitation present pressure probably pyroxene quartz quartzite range reaction region relative solubilities sand sandstone schists sedimentary sediments shown silica silver SiO2 slopes solution specimen streams structure sulphate sulphide surface Surv temperature thick tion U.S. Geol U.S. Geological Survey upper valley volcanic Wind River zone
Popular passages
Page 573 - Cambrian Geology and Paleontology. II. No. 10. Group Terms for the Lower and Upper Cambrian Series of Formations. [Smithsonian Miscellaneous Collections, Vol.
Page 586 - As the components of a system there are to be chosen the smallest number of independently variable constituents by means of which the composition of each phase participating in the state of equilibrium can be expressed in the form of a chemical equation.
Page 207 - Rosenbusch,4 which has been developed 1 Published with the permission of the Director of the US Geological Survey.
Page 586 - We shall therefore define the number of degrees of freedom of a system as the number of the variable factors, temperature, pressure, and concentration of the components, which must be arbitrarily fixed in order that the condition of the system may be perfectly defined.
Page 66 - Rev., 3, pp. 81, 177; 1895. distance of 2 cm. The results of the measurements on platinum are given in the following table: From the above table it will be seen that if the temperature of a platinum surface is measured with a polarizing pyrometer large errors may result if the effect of polarized light is neglected. Thus, if the surface be viewed at an angle of 50° with the normal, two readings may be obtained differing from one another by 80° C. at...
Page 635 - In this example the tail is also pointed and graduated. About seven of the outer primaries of the wing are shown with great distinctness, and two others can be easily made out The third primary is the longest; the second is slightly shorter; the first and fourth are about equal. There are also in the collection three detached contour feathers of small size, but whether pertaining to the same species as the other specimens cannot, of course, be determined.
Page 276 - The former demand the assumption of great horizontal diminution of the space covered by the disturbed strata, and suggest lateral pressure as the immediate force concerned; the latter involve little horizontal diminution, and suggest the application of vertical pressure from below.
Page 5 - The Table I comprises typical analyses4 of the waters from zinc mines both in Europe and in America, and of the waters from wells in the zinc district of Joplin, Mo. The figures given are all in parts per million. On inspection of these data, it will be noted that sulphur in all cases...
Page 586 - Findlay ('04, pp. 8-18) will assist in gaining some of the general ideas involved in this subject: A heterogenous system is made up of different portions, each in itself homogeneous, but marked off in space and separated from the other portions by bounding surfaces. These homogeneous, physically distinct and mechanically separable portions are called phases.
Page 276 - ... commonly by faulting, exceptionally by flexure. In the latter, few eruptive rocks occur ; in the former, volcanic phenomena abound, and are intimately associated with ridges of upheaval. The regular alternations of curved...