Ice-work, Present and PastK. Paul, Trench, Trübner & Company, Limited, 1903 - 295 pagini |
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Pagina 6
... Sometimes they travel to the end of the ice - stream ; but if small , they are more often engulfed in a crevasse , where we leave them for the present . When the bed of a valley has a fairly uniform slope , the glacier descends in a ...
... Sometimes they travel to the end of the ice - stream ; but if small , they are more often engulfed in a crevasse , where we leave them for the present . When the bed of a valley has a fairly uniform slope , the glacier descends in a ...
Pagina 7
... 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 end of the glacier , where it forms a ...
... 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 end of the glacier , where it forms a ...
Pagina 8
... 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 variety of circum- stances , but the nature of the rocks in ...
... 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 variety of circum- stances , but the nature of the rocks in ...
Pagina 9
... sometimes many cubic yards in volume may be seen , as we have said , travelling down the glacier ; as it retreats , such blocks are occasionally stranded , either on the sloping flanks of the valley , or on some prominent hummock of ...
... sometimes many cubic yards in volume may be seen , as we have said , travelling down the glacier ; as it retreats , such blocks are occasionally stranded , either on the sloping flanks of the valley , or on some prominent hummock of ...
Pagina 10
... sometimes even rather deeply scored . This also is clearly the handiwork of the ice , and a little investigation will show how it is accomplished . When a glacier moves over the rocky bed of a valley , the friction of so great a mass of ...
... sometimes even rather deeply scored . This also is clearly the handiwork of the ice , and a little investigation will show how it is accomplished . When a glacier moves over the rocky bed of a valley , the friction of so great a mass of ...
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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
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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.