Climate and Time in Their Geological Relations: A Theory of Secular Changes of the Earth's ClimateD. Appleton, 1875 - 577 páginas |
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Página 3
... present holds equally true of the past . Climatic agents are not only now the most important and influential ; they have been so during all past geological ages . They were so during the Cainozoic as much as during the present ; and ...
... present holds equally true of the past . Climatic agents are not only now the most important and influential ; they have been so during all past geological ages . They were so during the Cainozoic as much as during the present ; and ...
Página 5
... present taking place on the earth's crust . No amount of description , arrangement , and classification , how- ever perfect or accurate , of the facts which come under the eye of the geologist can ever constitute a science of geology ...
... present taking place on the earth's crust . No amount of description , arrangement , and classification , how- ever perfect or accurate , of the facts which come under the eye of the geologist can ever constitute a science of geology ...
Página 6
... present . For a long time it was supposed that during the Cambrian , Silurian , and other early geological periods , the climate of our globe was much hotter than now , and that ever since it has been gradually becoming cooler . And ...
... present . For a long time it was supposed that during the Cambrian , Silurian , and other early geological periods , the climate of our globe was much hotter than now , and that ever since it has been gradually becoming cooler . And ...
Página 9
... present ; and ( 2 ) , that the effect of placing all the land along the equator would be diametrically the opposite of that which Sir Charles supposes . But supposing that difference in the distribution of land and water would produce ...
... present ; and ( 2 ) , that the effect of placing all the land along the equator would be diametrically the opposite of that which Sir Charles supposes . But supposing that difference in the distribution of land and water would produce ...
Página 16
... present volume , but is further one of much general interest , I have entered some- what fully into the matter . The Gravitation theories may be divided into two classes . The first of these attributes the Gulf - stream and other ...
... present volume , but is further one of much general interest , I have entered some- what fully into the matter . The Gravitation theories may be divided into two classes . The first of these attributes the Gulf - stream and other ...
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Términos y frases comunes
amount of heat antarctic aphelion arctic regions Atlantic beds bottom boulder clay Caithness Carboniferous cause centre of gravity channel coal cold periods condition of climate consequently considerable denudation deposits depth descend earth's orbit eccentricity ecliptic effect Eocene equator evidence existence extent fact feet flow foot-pounds force Geikie Geol geological geologists glacial epoch glacier globe Grangemouth gravel greater Greenland Gulf-stream heat received ice-cap icebergs inter-glacial periods island James Geikie Kilsyth land land-ice latitude lower mass mean melting miles Miocene molecules motion North North Sea northern obliquity ocean ocean-currents perihelion polar column polar regions poles present probably produce Professor quantity of heat radiation regarding result river rocks sand says Scotland sea-bottom sea-level shear Sir Charles Lyell slope snow southern hemisphere specific gravity stones stratified stream striated submergence summer sun's supposed surface theory thickness tion valley warm periods winter
Pasajes populares
Página 331 - ... been removed from the general surface in one year ; and there seems no danger of our overrating the mean rate of waste by selecting the Mississippi as our example, for that river drains a country equal to more than half the continent of Europe, extends through twenty degrees of latitude, and therefore through regions enjoying a great variety of climate, and some of its tributaries descend from mountains of great height. The Mississippi is also more likely to afford us a fair test of ordinary...
Página 535 - Now, the perihelion of the orbit is situated nearly at the place of the northern winter solstice ; so that, were it not for the compensation we have just described, the effect would be to exaggerate the difference of summer and winter in the southern hemisphere, and to moderate it in the northern ; thus producing a more violent alternation of climate in the one hemisphere, and an approach to perpetual spring in the other. As it is, however, no such inequality subsists, but an equal and impartial...