Ice-work, Present and PastK. Paul, Trench, Trübner & Company, Limited, 1903 - 295 pagini |
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Pagina ix
... considerable interest , and to omit others which have a less direct connection with an ice age . For instance , nothing is said of the coarse gravels on some upland plateaux and in certain river valleys , though many of them almost ...
... considerable interest , and to omit others which have a less direct connection with an ice age . For instance , nothing is said of the coarse gravels on some upland plateaux and in certain river valleys , though many of them almost ...
Pagina 4
... considerable distance the wide field of névé1 shelves so gently as to seem nearly a plain , and its surface is almost unbroken . It is only as the slope steepens , on approaching the base of the actual peaks or the foot of the curtain ...
... considerable distance the wide field of névé1 shelves so gently as to seem nearly a plain , and its surface is almost unbroken . It is only as the slope steepens , on approaching the base of the actual peaks or the foot of the curtain ...
Pagina 7
... 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 bank called the ...
... 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 bank called the ...
Pagina 8
... considerable dimensions . If , however , the glacier be slowly shrinking , the mound is replaced by a wide scatter of boulders and débris . The same is true of the lateral moraines . These also occa- sionally form large banks , resting ...
... considerable dimensions . If , however , the glacier be slowly shrinking , the mound is replaced by a wide scatter of boulders and débris . The same is true of the lateral moraines . These also occa- sionally form large banks , resting ...
Pagina 10
... considerable effect . If it trespasses upon ground previously uncovered , it encounters rugged surfaces and jutting ledges . These it gradually wears away , making the rough places smooth , as angles are replaced by curves and craggy ...
... considerable effect . If it trespasses upon ground previously uncovered , it encounters rugged surfaces and jutting ledges . These it gradually wears away , making the rough places smooth , as angles are replaced by curves and craggy ...
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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.