Earth Sculpture; Or, The Origin of Land-forms |
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Page 6
... tract that extends from the Great Lakes of North America to the shores of the Arctic Ocean is almost entirely occupied by ... tracts as Brazil , the Canadian uplands , etc. , are of vast antiquity . Crys- talline schistose rocks , with ...
... tract that extends from the Great Lakes of North America to the shores of the Arctic Ocean is almost entirely occupied by ... tracts as Brazil , the Canadian uplands , etc. , are of vast antiquity . Crys- talline schistose rocks , with ...
Page 13
... - ments of the underlying rocks . In many elevated tracts , however , composed of highly disturbed and contorted strata , no such coincidence of surface - feat- ure and underground structure can be traced . The mountain INTRODUCTORY 13.
... - ments of the underlying rocks . In many elevated tracts , however , composed of highly disturbed and contorted strata , no such coincidence of surface - feat- ure and underground structure can be traced . The mountain INTRODUCTORY 13.
Page 15
... tracts , and be quite unconscious of the fact that geologically we have several times leaped up or jumped down hundreds of feet in a single step . Nay , some rivers flow across dislocations by which the strata have been shifted up or ...
... tracts , and be quite unconscious of the fact that geologically we have several times leaped up or jumped down hundreds of feet in a single step . Nay , some rivers flow across dislocations by which the strata have been shifted up or ...
Page 28
... tracts of more south- ern latitudes . Rain renders the superficial portions of rock more porous , and thus enables frost to act more effectually ; while frost , by widening pores and fissures , affords readier ingress to meteoric water ...
... tracts of more south- ern latitudes . Rain renders the superficial portions of rock more porous , and thus enables frost to act more effectually ; while frost , by widening pores and fissures , affords readier ingress to meteoric water ...
Page 33
... tracts rain washes the finer particles down the 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 ...
... tracts rain washes the finer particles down the 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 ...
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Common terms and phrases
accumulation Alpine Alps anticlines basalt base-level basins become beds boulder-clay Carboniferous character cirques cliffs coast-lines coasts configuration Cretaceous crust crustal movements crystalline débris denudation deposits depressions depth detritus direction dislocations drainage elevation epigene epigene action epigene agents eroded escarpments feet fiords flow fluvio-glacial fluvio-glacial deposits folds gently geological structure glacial action glacial erosion glaciers gradually ground-moraines hills hollows horizontal strata ice-flow ice-sheet igneous rocks inclined indented infrequently irregular islands joints kind laccoliths lakes land land-forms land-surface lava less limestone low grounds materials mer de glace modified moraines mountain-chain mountain-valleys mountains névé normal faults Old Red Sandstone outcrops owe their origin plain of erosion plateau regions relatively result ridges rock-basins rock-masses sand Sandstone schistose schists Section sediment slopes Southern Uplands strata streams and rivers superficial surface surface-features synclinal tectonic tend thickness tion tracts traversed underground undulating usually valleys vertical volcanic wind