Ice-works, Present and PastK. Paul, Trench, Trübner & Company, Limited, 1896 - 295 pagini |
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Pagina 48
... occur rounded , but seldom scratched , hills of gneiss with erratic blocks in the most unstable positions of equilibrium , separated by valleys with small mountain - lakes and scratched rock - surfaces . On the other hand , no real ...
... occur rounded , but seldom scratched , hills of gneiss with erratic blocks in the most unstable positions of equilibrium , separated by valleys with small mountain - lakes and scratched rock - surfaces . On the other hand , no real ...
Pagina 71
... . They are not arranged in definite strata , but occur throughout the deposit from base to summit . Some of them are faceted , polished , and striated in a manner indicative of glacial ARCTIC AND ANTARCTIC ICE - SHEETS 71.
... . They are not arranged in definite strata , but occur throughout the deposit from base to summit . Some of them are faceted , polished , and striated in a manner indicative of glacial ARCTIC AND ANTARCTIC ICE - SHEETS 71.
Pagina 83
... occur in mountain valleys , because they require a combination of favourable circum- stances , but three criteria may be formulated by which such basins are distinguished from ordinary valleys ( 1 . ) They never present those ...
... occur in mountain valleys , because they require a combination of favourable circum- stances , but three criteria may be formulated by which such basins are distinguished from ordinary valleys ( 1 . ) They never present those ...
Pagina 84
... occur in situa- tions where the excavatory force of the ice - stream must have been very slight , while they are wanting in those where it ought to have been more potent . The Lake of Lucerne and that of Lugano are curiously complicated ...
... occur in situa- tions where the excavatory force of the ice - stream must have been very slight , while they are wanting in those where it ought to have been more potent . The Lake of Lucerne and that of Lugano are curiously complicated ...
Pagina 95
... occur in one or two neighbouring valleys ; the best , a single one , being in Glen Gluoy , at an average height of 1165 feet , and there are " shelves " in Glen Spean itself at greater elevations . While it is agreed that these roads ...
... occur in one or two neighbouring valleys ; the best , a single one , being in Glen Gluoy , at an average height of 1165 feet , and there are " shelves " in Glen Spean itself at greater elevations . While it is agreed that these roads ...
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Alpine Alps amount angular basin beneath boulder clay breccias Carboniferous chalk chap cliffs climate coast comparatively considerable crags débris descend direction distance district Drift 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 Illustrations 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 places 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