Earth Sculpture; Or, The Origin of Land-forms |
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Page 32
... slopes and in mountain - regions generally , decomposed and disintegrated materials are seldom allowed to remain long in situ - rain and melting snow soon sweep away the finer portions . Great thicknesses of rotted rock are , therefore ...
... slopes and in mountain - regions generally , decomposed and disintegrated materials are seldom allowed to remain long in situ - rain and melting snow soon sweep away the finer portions . Great thicknesses of rotted rock are , therefore ...
Page 33
... slopes and spreads them over the hollows . After exceptionally heavy or long- continued rain this process becomes intensified — fine mud , silt , sand , and grit are swept into the brooks and streams , and the swollen rivers run ...
... slopes and spreads them over the hollows . After exceptionally heavy or long- continued rain this process becomes intensified — fine mud , silt , sand , and grit are swept into the brooks and streams , and the swollen rivers run ...
Page 38
... portions of the ground . On mountain declivities and hill slopes rock - disintegration and the removal of waste products will proceed more actively than upon low grounds and plains . The work of erosion will be ** 38 EARTH SCULPTURE.
... portions of the ground . On mountain declivities and hill slopes rock - disintegration and the removal of waste products will proceed more actively than upon low grounds and plains . The work of erosion will be ** 38 EARTH SCULPTURE.
Page 46
... slope of the surface ; ( b ) the geological structure of the ground ; and ( c ) the character of the rocks . Both hypogene and epigene agents , therefore , have been concerned in the evolution of land - forms . regions much disturbed by ...
... slope of the surface ; ( b ) the geological structure of the ground ; and ( c ) the character of the rocks . Both hypogene and epigene agents , therefore , have been concerned in the evolution of land - forms . regions much disturbed by ...
Page 53
... slope of only one degree , if continued for a few miles , will result in a fall of several hundred feet . If a surface be in- clined at an angle of one degree , then for every eleven miles of distance it will lose 1000 feet of ele ...
... slope of only one degree , if continued for a few miles , will result in a fall of several hundred feet . If a surface be in- clined at an angle of one degree , then for every eleven miles of distance it will lose 1000 feet of ele ...
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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