 Alps, during the day in summer, much ice is melted and the water courses from the glaciers accumulate in brooks which, as they reach the crevasses, tumble down in rushing waterfalls, and are lost in the depths of the ice. Directed, however, by the form...  Smithsonian Miscellaneous Collections - Página 981903 - 11 páginasVisualização completa - Sobre este livro
 | Archibald Geikie - 1882 - 996 páginas
...waterfalls, and are lost in the depths of the ice. Directed, however, by the form of the ice-passage against the rocky floor of the valley, the water descends...carrying with it the sand, mud, and stones which it may tare swept away from the surface of the glacier. By means of these materials it erodes deep pot-holes... | |
 | 1900 - 1016 páginas
...Alps, during the day in summer, much ice is melted and the water courses from the glaciers accumulate in brooks which, as they reach the crevasses, tumble...means of these materials it erodes deep pot-holes in the solid rock, in which the rounded detritus is left as the crevasse closes up or moves down the... | |
 | 1900 - 558 páginas
...Alps, during the day in summer, much ice is melted and the water courses from the glaciers accumulate in brooks which, as they reach the crevasses, tumble...means of these materials it erodes deep pot-holes in the solid rock, in which the rounded detritus is left as the crevasse closes up or moves down the... | |
 | Sir Archibald Geikie - 1902 - 490 páginas
...waterfalls, and are lost in the depths of the ice. Directed, however, by the form of the ice-passage against the rocky floor of the valley, the water descends...particular spot, carrying with it the sand, mud, and stones Fig. 158.— Ice-worn surface of rock, showing Polish, Btri8e, Groovings, and Erratics, Sutherland.... | |
 | 1833 - 668 páginas
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