Ice-work, Present and PastK. Paul, Trench, Trübner & Company, Limited, 1903 - 295 pagini |
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Pagina 4
... become frequent . Then the frozen snow , for here it can hardly be called ice , is riven into strange forms , and usually one chasm - named the Bergschrund— wider and more persistent than the rest , severs the snow and ice of the ...
... become frequent . Then the frozen snow , for here it can hardly be called ice , is riven into strange forms , and usually one chasm - named the Bergschrund— wider and more persistent than the rest , severs the snow and ice of the ...
Pagina 5
... become more frequent , till at last they begin to form a kind of selvage on the edge of the ice- stream . Obviously , as the valley which it descends becomes better defined and sinks deeper into the mountain mass , the crags and ...
... become more frequent , till at last they begin to form a kind of selvage on the edge of the ice- stream . Obviously , as the valley which it descends becomes better defined and sinks deeper into the mountain mass , the crags and ...
Pagina 6
... become elevated on pedestals ; for they act as parasols , and so the ice beneath them melts less rapidly than the exposed surface of the glacier . Sometimes they travel to the end of the ice - stream ; but if small , they are more often ...
... become elevated on pedestals ; for they act as parasols , and so the ice beneath them melts less rapidly than the exposed surface of the glacier . Sometimes they travel to the end of the ice - stream ; but if small , they are more often ...
Pagina 7
... become spread out over the surface . Sometimes for a considerable distance the mass of scattered débris - grit , gravel , and boulders of all sizes almost conceals the lower part of the ice- stream . The load at last is dropped at the ...
... become spread out over the surface . Sometimes for a considerable distance the mass of scattered débris - grit , gravel , and boulders of all sizes almost conceals the lower part of the ice- stream . The load at last is dropped at the ...
Pagina 8
... become features no less definite than the terminal moraine ; sometimes their materials also may be scattered , owing to a steady shrinkage of the glacier on the sloping sides of the valley . The volume of the moraine is dependent on a ...
... become features no less definite than the terminal moraine ; sometimes their materials also may be scattered , owing to a steady shrinkage of the glacier on the sloping sides of the valley . The volume of the moraine is dependent on a ...
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Termeni și expresii frecvente
Alpine Alps amount angular basin beneath boulder clay breccias Britain Carboniferous chalk chap cliffs climate coast comparatively considerable crags débris descend direction distance district Drift Edition elevation England Eocene erratics feet above sea-level fragments Geol geologists Geology Geology of England glacial deposits Glacial Epoch glaciers Glen Roy granite Greenland ground height higher hills hypothesis Ice Age ice-sheet ice-streams inches indicate inland ice Irish Sea islands Jour lakes land land-ice latitude latter less lower lowlands Malaspina Glacier marine mass material melting miles Moel Tryfaen molluscs moraine mountain nearly neighbourhood névé northern Norway numerous Nunataks occasionally occur peaks pebbles precipitation present probably Professor Quart range region ridges rise river roches moutonnées sands and gravels Scotland shells side slope snow snow-line sometimes southern stones stratified streams striated subangular submergence surface temperature terminal moraine thickness tion traced upper valley Wales western yards
Pasaje populare
Pagina 59 - It was a beautifully clear evening, and we had a most enchanting view of the two magnificent ranges of mountains, whose lofty peaks, perfectly covered with eternal snow, rose to elevations varying from seven to ten thousand feet above the level of the ocean. The glaciers that filled their intervening valleys, and which descended from near the mountain summits, projected in many places several miles into the nea, and terminated in lofty perpendicular cliffs.