The Journal of Geology, 21. köideThomas Chrowder Chamberlin University of Chicago Press, 1913 Vols. for 1893-1923 includes section: "Reviews." |
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Results 1-5 of 79
Page 51
... granites . They are naturally encountered over larger areas in northern Luzon , where erosion has been at work longer and more vigorously . The central Cordillera then is the principal habitat , if we may use the term in this connection ...
... granites . They are naturally encountered over larger areas in northern Luzon , where erosion has been at work longer and more vigorously . The central Cordillera then is the principal habitat , if we may use the term in this connection ...
Page 53
... granite and schistose diorite . The rocks of the volcanic mountains are by far the most widely distributed ' of all the rocks in Southern Luzon , and possibly in the Island as a whole . The country surrounding Manila and south- western ...
... granite and schistose diorite . The rocks of the volcanic mountains are by far the most widely distributed ' of all the rocks in Southern Luzon , and possibly in the Island as a whole . The country surrounding Manila and south- western ...
Page 64
... Granite Quartz - spele Alkali - rhyalite Trachtic Rheolite Trachyte Trachyandesite Trachy dolerite Basalt Quaternary Tradyle - dykes Compendife Quartz - syenite FIG . 3 the quartz phenocrysts . Quartz is frequently inclosed , and ...
... Granite Quartz - spele Alkali - rhyalite Trachtic Rheolite Trachyte Trachyandesite Trachy dolerite Basalt Quaternary Tradyle - dykes Compendife Quartz - syenite FIG . 3 the quartz phenocrysts . Quartz is frequently inclosed , and ...
Page 87
... granite dyke exposed on the road section piercing the mica schists belonging to the Malmesbury Formation ; about 5 yards from the granite the rock suddenly becomes full of well - formed andalusite crystals about an inch in length . The ...
... granite dyke exposed on the road section piercing the mica schists belonging to the Malmesbury Formation ; about 5 yards from the granite the rock suddenly becomes full of well - formed andalusite crystals about an inch in length . The ...
Page 88
... granite , because in Stellenbosch , under precisely similar conditions , large feldspar crystals develop . Now the granite at George is a muscovite granite and would want all the potash for its own minerals , and therefore passed out ...
... granite , because in Stellenbosch , under precisely similar conditions , large feldspar crystals develop . Now the granite at George is a muscovite granite and would want all the potash for its own minerals , and therefore passed out ...
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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...