Earth Sculpture; Or, The Origin of Land-forms |
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Page 31
... similar joints , etc. , opening upwards , and thus forms natural springs . All these springs contain mineral matter , derived from the chemical decomposition and solution of rock - constituents . Many , indeed , are so highly ...
... similar joints , etc. , opening upwards , and thus forms natural springs . All these springs contain mineral matter , derived from the chemical decomposition and solution of rock - constituents . Many , indeed , are so highly ...
Page 33
... 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 continuous rain . When thaw en- sues weathered rock - surfaces ...
... 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 continuous rain . When thaw en- sues weathered rock - surfaces ...
Page 38
... similar work performed by rivers in all quarters of the globe shows that the rate at which drainage - areas generally are being low- ered is one yard in 8000 to 11,000 years . It must not be supposed that this erosion is equal ...
... similar work performed by rivers in all quarters of the globe shows that the rate at which drainage - areas generally are being low- ered is one yard in 8000 to 11,000 years . It must not be supposed that this erosion is equal ...
Page 40
... similar reasons we may delay the con- sideration of marine erosion . The action of the sea upon the land is necessarily confined to a narrow belt , whereas that of the subaërial agents affects the whole surface of the land . We may take ...
... similar reasons we may delay the con- sideration of marine erosion . The action of the sea upon the land is necessarily confined to a narrow belt , whereas that of the subaërial agents affects the whole surface of the land . We may take ...
Page 51
... similar flats of clay and loam of the same age as the gravel have frequently been furrowed and channelled to such an extent that the originally level surface has largely , or even entirely , disappeared . The reason is obvious , for ...
... similar flats of clay and loam of the same age as the gravel have frequently been furrowed and channelled to such an extent that the originally level surface has largely , or even entirely , disappeared . The reason is obvious , for ...
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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