Earth Sculpture; Or, The Origin of Land-forms |
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Page 5
... thickness - swelling out here , thinning off there : in some lands being represented by strata many thou- sands of feet in thickness , in others dwindling down to a few yards . In short , we may picture to ourselves each system as ...
... thickness - swelling out here , thinning off there : in some lands being represented by strata many thou- sands of feet in thickness , in others dwindling down to a few yards . In short , we may picture to ourselves each system as ...
Page 11
... thickness . Another evident mark of dis- turbance is furnished by the presence of dislocations , or faults , as they are technically termed , along the line of which the rocks have been shifted for , it may be , hundreds and sometimes ...
... thickness . Another evident mark of dis- turbance is furnished by the presence of dislocations , or faults , as they are technically termed , along the line of which the rocks have been shifted for , it may be , hundreds and sometimes ...
Page 15
... thickness of rocks thus re- moved can be proved to amount in many cases to thousands of feet . Not less striking is the evidence of rock - removal furnished by the phenomena of faults . At the sur- face there may be no inequality of ...
... thickness of rocks thus re- moved can be proved to amount in many cases to thousands of feet . Not less striking is the evidence of rock - removal furnished by the phenomena of faults . At the sur- face there may be no inequality of ...
Page 17
... thickness of rock removed from the surface of the land is sometimes to be measured by many thousands of feet , or even yards , we see at once that subterranean action cannot have been directly implicated in the spoliation of the land ...
... thickness of rock removed from the surface of the land is sometimes to be measured by many thousands of feet , or even yards , we see at once that subterranean action cannot have been directly implicated in the spoliation of the land ...
Page 26
... thickness . Some granites , for example , are reduced to a kind of gritty clay which may be dug with a spade . Argillaceous and silicious rocks are not so readily affected by the chemical action of rain . Not infre- quently , however ...
... thickness . Some granites , for example , are reduced to a kind of gritty clay which may be dug with a spade . Argillaceous and silicious rocks are not so readily affected by the chemical action of rain . Not infre- quently , however ...
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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