Earth Sculpture; Or, The Origin of Land-forms |
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Page 25
... ground organic acids are derived by it from the decaying vegetable and animal matter with which soils are more or less im- pregnated . Armed with such chemical agents , it attacks the various minerals of which rocks are com- posed , and ...
... ground organic acids are derived by it from the decaying vegetable and animal matter with which soils are more or less im- pregnated . Armed with such chemical agents , it attacks the various minerals of which rocks are com- posed , and ...
Page 31
... ground is undermined and the surface not infrequently subsides . In countries where calcareous rocks largely predominate , acidulated water filtering down from the surface through fis- sures and other division - planes has often licked ...
... ground is undermined and the surface not infrequently subsides . In countries where calcareous rocks largely predominate , acidulated water filtering down from the surface through fis- sures and other division - planes has often licked ...
Page 32
... ground has been nota- bly affected by the collapse of underground channels and chambers . But if the results of the chemical action of meteoric water be most evident in places where calcareous rocks predominate , yet the thick- ness ...
... ground has been nota- bly affected by the collapse of underground channels and chambers . But if the results of the chemical action of meteoric water be most evident in places where calcareous rocks predominate , yet the thick- ness ...
Page 38
... 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.
... 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
... 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 subterranean action within In relatively recent geological ...
... 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 subterranean action within In relatively recent geological ...
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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