Earth Sculpture; Or, The Origin of Land-forms |
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Page 13
... movements of the solid crust have taken place . Such crustal dis- turbances are probably in chief measure due to the fact that the earth is a cooling body . As the solid crust sinks down upon the cooling and contracting nu- cleus , it ...
... movements of the solid crust have taken place . Such crustal dis- turbances are probably in chief measure due to the fact that the earth is a cooling body . As the solid crust sinks down upon the cooling and contracting nu- cleus , it ...
Page 14
... movement is not the only factor in the production of surface - features . The sections already given will serve to illustrate the general fact that underground structure and su- perficial configuration do not necessarily correspond ...
... movement is not the only factor in the production of surface - features . The sections already given will serve to illustrate the general fact that underground structure and su- perficial configuration do not necessarily correspond ...
Page 17
... movements have shared in the production of surface - features , we must be convinced , at the same time , that some other factor has aided in the work of shaping out our lands . Earth - movements quite account for the folding and ...
... movements have shared in the production of surface - features , we must be convinced , at the same time , that some other factor has aided in the work of shaping out our lands . Earth - movements quite account for the folding and ...
Page 41
... movements , entered aa . FIG . 6. SECTION ACROSS UNCONFORMABLE STRATA . beds of sandstone , shale , etc .; bb , conglomerates and sandstone resting discordantly or unconformably upon a a ; u u , line of unconformity . into the formation ...
... movements , entered aa . FIG . 6. SECTION ACROSS UNCONFORMABLE STRATA . beds of sandstone , shale , etc .; bb , conglomerates and sandstone resting discordantly or unconformably upon a a ; u u , line of unconformity . into the formation ...
Page 42
... movement of the crust took place , which resulted in the folding of the sedi- mentary strata and the conversion of the sea - bottom into dry land . The folded rocks were now subjected during some prolonged period to the action of the ...
... movement of the crust took place , which resulted in the folding of the sedi- mentary strata and the conversion of the sea - bottom into dry land . The folded rocks were now subjected during some prolonged period to the action of the ...
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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