Earth Sculpture; Or, The Origin of Land-forms |
From inside the book
Page 56
... Eventually the river , escaping over the lower lip of that basin , deepened the outlet and succeeded in draining the lake , which was then re- placed by an alluvial plain . At this stage the nearly level surface of the drained lake ...
... Eventually the river , escaping over the lower lip of that basin , deepened the outlet and succeeded in draining the lake , which was then re- placed by an alluvial plain . At this stage the nearly level surface of the drained lake ...
Page 62
James Geikie. shale weathers away more rapidly than the overlying rock , and eventually forms a sloping stage upon which the débris derived from the receding cliffs continues to accumulate . Meanwhile , however , the river digs down ...
James Geikie. shale weathers away more rapidly than the overlying rock , and eventually forms a sloping stage upon which the débris derived from the receding cliffs continues to accumulate . Meanwhile , however , the river digs down ...
Page 63
... eventually a river - valley appears bounded , not by vertical cliffs , but rather by a succession of hori- zontal tiers of precipitous faces , corresponding to the outcrops of the several strata of harder rock- separated the one from ...
... eventually a river - valley appears bounded , not by vertical cliffs , but rather by a succession of hori- zontal tiers of precipitous faces , corresponding to the outcrops of the several strata of harder rock- separated the one from ...
Page 65
... eventually meet atop . The flat summit now disappears , and is replaced by a sharp crest , ridge , peak , or rounded top , as the case may be . Each diminishing segment , in short , ultimately acquires a more or less strongly pronounced ...
... eventually meet atop . The flat summit now disappears , and is replaced by a sharp crest , ridge , peak , or rounded top , as the case may be . Each diminishing segment , in short , ultimately acquires a more or less strongly pronounced ...
Page 66
... eventually succeed in reducing to that base - level all the lands that drain into the lake . The lake might be entirely silted up , but so long as the movement of elevation persisted , and the river ( at the former outlet of the lake ) ...
... eventually succeed in reducing to that base - level all the lands that drain into the lake . The lake might be entirely silted up , but so long as the movement of elevation persisted , and the river ( at the former outlet of the lake ) ...
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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