Earth Sculpture; Or, The Origin of Land-forms |
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Page 101
... elevation of the strata affect the sur- face ? Will the complex folding of the rocks give rise to similar intricate deformations of the surface ? This does not necessarily follow , for , were the move- ment of elevation very slow and ...
... elevation of the strata affect the sur- face ? Will the complex folding of the rocks give rise to similar intricate deformations of the surface ? This does not necessarily follow , for , were the move- ment of elevation very slow and ...
Page 102
... elevation of a moun- tain - chain was ever suddenly effected . So far as we can judge from the evidence supplied by geological structure , it would seem as if the horizontal move- ments of the crust had been gradual and protracted , and ...
... elevation of a moun- tain - chain was ever suddenly effected . So far as we can judge from the evidence supplied by geological structure , it would seem as if the horizontal move- ments of the crust had been gradual and protracted , and ...
Page 103
... elevation along a line or axis not far removed from the thrust - side of the chain . From this axis the ridges decline gradually in importance in the direction of earth - movement , and eventually die out in a series of gentle undula ...
... elevation along a line or axis not far removed from the thrust - side of the chain . From this axis the ridges decline gradually in importance in the direction of earth - movement , and eventually die out in a series of gentle undula ...
Page 104
James Geikie. miles , gradually declining in elevation towards both ends of the chain . With these conditions of surface , it is obvious that drainage will take place in the di- rection of the great longitudinal valleys or synclinal ...
James Geikie. miles , gradually declining in elevation towards both ends of the chain . With these conditions of surface , it is obvious that drainage will take place in the di- rection of the great longitudinal valleys or synclinal ...
Page 108
... elevation . It consists essen- tially of a succession of anticlines and synclines , chiefly unsymmetrical . The strata are not only folded and often exceedingly contorted , but the structure is still further complicated by vast thrust ...
... elevation . It consists essen- tially of a succession of anticlines and synclines , chiefly unsymmetrical . The strata are not only folded and often exceedingly contorted , but the structure is still further complicated by vast thrust ...
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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