The American Journal of Science, Том 204J.D. & E.S. Dana, 1922 |
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Стр. 4
... cent.5 This may seem a small change , but it is twice as great as the whole change between 585 ° and room temperature . Detailed Results with Artificial and Natural Feldspars . The above observations showed very clearly that potash ...
... cent.5 This may seem a small change , but it is twice as great as the whole change between 585 ° and room temperature . Detailed Results with Artificial and Natural Feldspars . The above observations showed very clearly that potash ...
Стр. 5
contains about 10 per cent albite . The composition of these minerals is shown in Table I. The last two analy- ses were made by Dr. H. E. Merwin in connection with an investigation he has not yet published . The results of his analyses ...
contains about 10 per cent albite . The composition of these minerals is shown in Table I. The last two analy- ses were made by Dr. H. E. Merwin in connection with an investigation he has not yet published . The results of his analyses ...
Стр. 9
... CENT 80 5:02 FIC . 2. - Equilibrium diagram of the system MgSiO . — SiO2 . ing as the temperature is raised , until at 1577 ° the for- sterite completely disappears and only then is a liquid of the composition MgSiO , obtained . " A ...
... CENT 80 5:02 FIC . 2. - Equilibrium diagram of the system MgSiO . — SiO2 . ing as the temperature is raised , until at 1577 ° the for- sterite completely disappears and only then is a liquid of the composition MgSiO , obtained . " A ...
Стр. 10
... CENT FIG . 3. - Diagram illustrating the melting of orthoclase . The compound , KAlSi , O , with which we are here con- cerned , breaks up in this latter manner . At 1170 ° it forms leucite , KAlSi2O , and liquid , and its behavior can ...
... CENT FIG . 3. - Diagram illustrating the melting of orthoclase . The compound , KAlSi , O , with which we are here con- cerned , breaks up in this latter manner . At 1170 ° it forms leucite , KAlSi2O , and liquid , and its behavior can ...
Стр. 11
... cent . We have placed the point B in accordance with this estimate . The melting point of leucite we know to be very high , above that of platinum ( 1755 ° ) . The melting point of SiO2 ( cristobalite ) has been fixed at 1710 ° . Of the ...
... cent . We have placed the point B in accordance with this estimate . The melting point of leucite we know to be very high , above that of platinum ( 1755 ° ) . The melting point of SiO2 ( cristobalite ) has been fixed at 1710 ° . Of the ...
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ammonium chloride appears aragonite atoms bands barium basalt Bayer's beds biotite bowlders brachiopods calcite canine cent chemical chloride clays colloidal color composition compound cone cone-in-cone Cope crystalline crystals deposits described determined Devonian diameter Dinictis Eocene evidence fanglomerates fault plane fauna feet feldspar formation fossils gabbro genus Geological Glass gneiss granite graptolites Holotype Hyrachyus igneous indices John Day JOUR lake Laue photographs layer length leucite limestone liquid lower Marsh mass material measurements melting method miles minerals Miocene mixture molar Nimravus Nimravus debilis occur orthoclase oxide Payette platycopis Pogonodon Pogonodon davisi posterior premolars present probably quartz lode quartzite Reagan refraction region ridge rocks salt sandstone SCI.-FIFTH SERIES sediments serrulidens shales silicates skull solution space groups sparagmite species specimen stibnite strontium structure surface symmetry temperature thickness tion Triassic trilobites U. S. Geol upper zone