Earth Sculpture; Or, The Origin of Land-forms |
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Page 45
... modified and come to assume a diversified configuration . The relatively hard and resisting rocks will determine the position of the high grounds , while the low grounds will practically coincide with the areas occupied by the more ...
... modified and come to assume a diversified configuration . The relatively hard and resisting rocks will determine the position of the high grounds , while the low grounds will practically coincide with the areas occupied by the more ...
Page 46
... modification of drainage - systems . It is remarkable , however , how persistent are great rivers in maintaining their direction . When it has been once fairly established , a large river may outlive many revolutions of the surface ...
... modification of drainage - systems . It is remarkable , however , how persistent are great rivers in maintaining their direction . When it has been once fairly established , a large river may outlive many revolutions of the surface ...
Page 47
... modified by epigene action , and thus it has come to pass that in countries which have existed as dry land for vast periods of time , undisturbed in the later stages of their history by crustal movement , the surface - features are such ...
... modified by epigene action , and thus it has come to pass that in countries which have existed as dry land for vast periods of time , undisturbed in the later stages of their history by crustal movement , the surface - features are such ...
Page 50
... modified superficially by subaërial denudation , we must admit that their most character- istic features are original , and due to the mode of their formation . The same holds true to a large extent of recent lacustrine and fluviatile ...
... modified superficially by subaërial denudation , we must admit that their most character- istic features are original , and due to the mode of their formation . The same holds true to a large extent of recent lacustrine and fluviatile ...
Page 51
... modified superficially , while at the same time they are undermined and cut into by streams and rivers . The plains of accumulation at present referred to belong to a recent geological age , and consist for the most part of incoherent ...
... modified superficially , while at the same time they are undermined and cut into by streams and rivers . The plains of accumulation at present referred to belong to a recent geological age , and consist for the most part of incoherent ...
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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