Earth Sculpture; Or, The Origin of Land-forms |
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Page 34
James Geikie. But in continental tracts the larger rivers are always more or less turbid . This is due to many causes . Some rivers , for example , head in glaciers , and are thus clouded at their very origin . Others , again , cross ...
James Geikie. But in continental tracts the larger rivers are always more or less turbid . This is due to many causes . Some rivers , for example , head in glaciers , and are thus clouded at their very origin . Others , again , cross ...
Page 39
... tracts of streams and rivers . Indeed , we may say that it is in valleys generally that we may expect to find the most cogent evidence of erosion now in action . A little consideration will show that the estimates just referred to do ...
... tracts of streams and rivers . Indeed , we may say that it is in valleys generally that we may expect to find the most cogent evidence of erosion now in action . A little consideration will show that the estimates just referred to do ...
Page 50
... tracts through which streams and rivers meander , are , like deltas and raised beaches , plains of accumulation . It goes without saying , however , that many of these plains are more or less eroded , and have acquired an undulating ...
... tracts through which streams and rivers meander , are , like deltas and raised beaches , plains of accumulation . It goes without saying , however , that many of these plains are more or less eroded , and have acquired an undulating ...
Page 68
... tract like that of the Cañon district the influence exerted by the petrological character of the strata in determining the detailed features of the ground is everywhere conspicuous . In other regions where moister climatic conditions ...
... tract like that of the Cañon district the influence exerted by the petrological character of the strata in determining the detailed features of the ground is everywhere conspicuous . In other regions where moister climatic conditions ...
Page 73
... tract of horizontal strata has been elevated along an axis so as to form a considerable island . If the movement of elevation were slowly effected the sea would doubtless modify the land - surface as it arose , but for simplicity's sake ...
... tract of horizontal strata has been elevated along an axis so as to form a considerable island . If the movement of elevation were slowly effected the sea would doubtless modify the land - surface as it arose , but for simplicity's sake ...
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Common terms and phrases
accumulation Alps anticlines basalt base-level basins become beds Carboniferous character cliffs coast-lines cones configuration Cretaceous crust crustal movements crystalline débris denudation deposits depressions depth detritus direction dislocations drainage elevation epigene action epigene agents eroded escarpments eventually feet fiords flexures flow fluvio-glacial deposits folds fracture gently geological structure glacial action glaciers gradually granite ground-moraines Highlands hills hollows horizontal strata ice-sheet igneous rocks inclined indented infrequently irregular islands joints Jura Mountains laccoliths lakes land land-forms land-surface lava less limestone low grounds masses materials Mesozoic modified moraines mountain-chain mountain-valleys mountains normal faults North Old Red Sandstone outcrops owe their origin Permian plain of erosion plateau regions relatively result ridges rock-basins rock-masses sand sandstones schistose schists Section sediment shales Silurian slopes Southern Uplands strata streams and rivers superficial surface surface-features synclinal tectonic tend thickness tion tracts traversed underground undulating usually valleys vertical volcanic