The Evolution of the Earth and Its Inhabitants: A Series of Lectures Delivered Before the Yale Chapter of the Sigma Xi During the Academic Year 1916-1917Yale University Press, 1920 - Всего страниц: 208 |
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Стр. 34
... magma would be dominantly water - vapor , followed in order of importance by carbon dioxide and carbon monoxide , chlorine and hydrochloric acid , with some nitrogen , but no free oxygen . The present atmosphere of nitrogen and oxygen ...
... magma would be dominantly water - vapor , followed in order of importance by carbon dioxide and carbon monoxide , chlorine and hydrochloric acid , with some nitrogen , but no free oxygen . The present atmosphere of nitrogen and oxygen ...
Стр. 36
... nearer to that which occurs in a large reservoir of magma intruded into the crust than to the freezing of a modern lava stream in contact with the air . At last the rapid generation of heat by impact lessened 36 EVOLUTION OF THE EARTH.
... nearer to that which occurs in a large reservoir of magma intruded into the crust than to the freezing of a modern lava stream in contact with the air . At last the rapid generation of heat by impact lessened 36 EVOLUTION OF THE EARTH.
Стр. 37
... magma was more siliceous , of lighter gravity , and in crystalli- zation gave to the upper shell a higher proportion of feldspar and quartz . The original crust of the earth was consequently a granite . The process of fractional ...
... magma was more siliceous , of lighter gravity , and in crystalli- zation gave to the upper shell a higher proportion of feldspar and quartz . The original crust of the earth was consequently a granite . The process of fractional ...
Стр. 40
... magma , the denser material sinking , the lighter rising . There are indications that the process goes forward on a larger scale also , a scale so large that the dark and heavy base is never seen , erosion of later ages being restricted ...
... magma , the denser material sinking , the lighter rising . There are indications that the process goes forward on a larger scale also , a scale so large that the dark and heavy base is never seen , erosion of later ages being restricted ...
Стр. 42
... magma which thus comes from the greatest depth and in greatest volume would , because of the initial density stratification , produce a notable increase in the density of the outer crust . In order to reëstablish isostatic equilibrium ...
... magma which thus comes from the greatest depth and in greatest volume would , because of the initial density stratification , produce a notable increase in the density of the outer crust . In order to reëstablish isostatic equilibrium ...
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active animals appears Archeozoic areas aridity Asia atmosphere average body California carbon dioxide Cenozoic cent chemical chordate civilization climatic changes close complex continental continental platforms continents Cretaceous crust cynodonts deaths density developed Devonian diameter dinosaurs early earth earth-growth elements energy environment Eocene erosion evidence evolution existence extinction fact Figure forms fossil geologic geologists glacial granite greater habitat heat higher humidity hypothesis igneous rocks increase invertebrate known lands less limestones lithosphere living matter magma mammals marine mass material resources mental Mesozoic miles million Miocene molten moon nature nitrogen North America ocean basins orbits organisms origin outer Paleozoic period Permian planetesimal planetoids planets present primates probably proteins Proterozoic protoplasm rainfall record regions reptiles result RICHARD SWANN LULL rise rotation sedimentary sediments Silurian solar system spiral nebula stars surface temperature terrestrial theory thickness tidal forces tion Triassic tropical variability vertebrates water-vapor Yale zone