The Journal of Geology, 21. köideThomas Chrowder Chamberlin University of Chicago Press, 1913 Vols. for 1893-1923 includes section: "Reviews." |
From inside the book
Results 1-5 of 29
Page 81
... gabbro of the Cuillin Hills of Skye , but nothing like the stupendous nature of the Karroo laccolite occurs in other parts of the world . The Karroo laccolite is some 700 miles long by at least 200 miles broad ; the great Transvaal ...
... gabbro of the Cuillin Hills of Skye , but nothing like the stupendous nature of the Karroo laccolite occurs in other parts of the world . The Karroo laccolite is some 700 miles long by at least 200 miles broad ; the great Transvaal ...
Page 93
... gabbro , it often partially fuses it and converts it into a rock consisting of hornblende and feldspar ( labradorite to oligoclase ) . At any rate the absorption of the sediments by the dolerite necessitates the escape of siliceous ...
... gabbro , it often partially fuses it and converts it into a rock consisting of hornblende and feldspar ( labradorite to oligoclase ) . At any rate the absorption of the sediments by the dolerite necessitates the escape of siliceous ...
Page 149
... Mountains GRANITE HILLS Ma.3 No.3 FIG . 5. - Plain No. 4 with the south end of the Wind River Mountains in the distance TABLE I MINERALOGICAL COMPOSITION OF THE GABBRO AND ITS DERIVATIVES. CENOZOIC HISTORY OF WIND RIVER MOUNTAINS 149.
... Mountains GRANITE HILLS Ma.3 No.3 FIG . 5. - Plain No. 4 with the south end of the Wind River Mountains in the distance TABLE I MINERALOGICAL COMPOSITION OF THE GABBRO AND ITS DERIVATIVES. CENOZOIC HISTORY OF WIND RIVER MOUNTAINS 149.
Page 160
... gabbro masses and II diabase dikes have been mapped within the quadrangle . Among the gabbros there are many remarkable variations of primary and secondary origin . It is the chief purpose of this paper to describe and attempt to ...
... gabbro masses and II diabase dikes have been mapped within the quadrangle . Among the gabbros there are many remarkable variations of primary and secondary origin . It is the chief purpose of this paper to describe and attempt to ...
Page 161
... gabbro , it being quite the rule to find such coarse grained dikes often of very respectable size cutting the gabbros and frequently sending small tongues into the latter rock . Diabase occurs in small dikes , and in contrast with the ...
... gabbro , it being quite the rule to find such coarse grained dikes often of very respectable size cutting the gabbros and frequently sending small tongues into the latter rock . Diabase occurs in small dikes , and in contrast with the ...
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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...