Earth Sculpture; Or, The Origin of Land-forms |
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Page 31
... matter leached out at the surface and carried away by streams and rivers , it is obvious that in course of time the land cannot fail to have been con- siderably modified by chemical action alone . In point of AGENTS OF DENUDATION 31.
... matter leached out at the surface and carried away by streams and rivers , it is obvious that in course of time the land cannot fail to have been con- siderably modified by chemical action alone . In point of AGENTS OF DENUDATION 31.
Page 33
... streams , and the swollen rivers run discoloured to the sea . Similar floods often result from the melting of snow in spring . During such floods our rivers are generally more turbid than when they are swollen merely by heavy or ...
... streams , and the swollen rivers run discoloured to the sea . Similar floods often result from the melting of snow in spring . During such floods our rivers are generally more turbid than when they are swollen merely by heavy or ...
Page 34
... stream and its affluents become clouded with sediment . It is in tropical and subtropical latitudes , of course , that the most destructive effects of rain are witnessed . During the wet season the rivers of such regions dis- charge ...
... stream and its affluents become clouded with sediment . It is in tropical and subtropical latitudes , of course , that the most destructive effects of rain are witnessed . During the wet season the rivers of such regions dis- charge ...
Page 35
... streams , but much also is dis- lodged by the undermining action of the water itself . Rock - fragments when first introduced are more or less angular , but as they travel down stream they often break up into smaller pieces along ...
... streams , but much also is dis- lodged by the undermining action of the water itself . Rock - fragments when first introduced are more or less angular , but as they travel down stream they often break up into smaller pieces along ...
Page 36
... stream , while rivers that flow through lands whose rocks are readily eroded carry more sediment than rivers of equal volume and velocity traversing regions of more resistant rocks . Should a lake interrupt the current of a river , all ...
... stream , while rivers that flow through lands whose rocks are readily eroded carry more sediment than rivers of equal volume and velocity traversing regions of more resistant rocks . Should a lake interrupt the current of a river , all ...
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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