Earth Sculpture; Or, The Origin of Land-forms |
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Page 4
... short . The igneous rocks consist partly of lavas and frag- mental materials which have been ejected at the sur- face , as in modern volcanoes , and partly of formerly molten masses which have cooled and consolidated below ground . The ...
... short . The igneous rocks consist partly of lavas and frag- mental materials which have been ejected at the sur- face , as in modern volcanoes , and partly of formerly molten masses which have cooled and consolidated below ground . The ...
Page 5
... short , we may picture to ourselves each system as consisting of a series of larger and smaller lenticular sheets , irregularly distributed over ' See Appendix for Table of Geological Systems . the earth's surface . The various systems ...
... short , we may picture to ourselves each system as consisting of a series of larger and smaller lenticular sheets , irregularly distributed over ' See Appendix for Table of Geological Systems . the earth's surface . The various systems ...
Page 18
... short , rocks are being assaulted and reduced . But in order to bring this fact more forcibly before the reader , it will be well to sketch , as briefly as may be , the general character of the warfare which is being waged against rocks ...
... short , rocks are being assaulted and reduced . But in order to bring this fact more forcibly before the reader , it will be well to sketch , as briefly as may be , the general character of the warfare which is being waged against rocks ...
Page 23
... short , they occupy a very subordinate place in the architecture of the earth's crust . We have now to consider how the superficial or epigene agents attack and reduce rocks . And first , we may note that rocks at the surface are ...
... short , they occupy a very subordinate place in the architecture of the earth's crust . We have now to consider how the superficial or epigene agents attack and reduce rocks . And first , we may note that rocks at the surface are ...
Page 25
... short , to transport all loose material from the scene of its origin to the borders of the desert . In latitudes like our own , insolation doubtless shares in the disintegration of rocks , but the most conspicu- ous agent employed in ...
... short , to transport all loose material from the scene of its origin to the borders of the desert . In latitudes like our own , insolation doubtless shares in the disintegration of rocks , but the most conspicu- ous agent employed in ...
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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