Earth Sculpture; Or, The Origin of Land-forms |
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Page 82
... developed by denudation . When the dip of the strata is persistent over a wide extent of country , we shall have more or less prominent escarp- ments traversing such a region continuously for miles . The escarpments will obviously vary ...
... developed by denudation . When the dip of the strata is persistent over a wide extent of country , we shall have more or less prominent escarp- ments traversing such a region continuously for miles . The escarpments will obviously vary ...
Page 83
... developed along the outcrops of the Jurassic limestones and the Chalk , and thus have a general northerly or north- easterly trend . We cannot doubt that the present irregularities of the surface are the result of long - con- tinued ...
... developed along the outcrops of the Jurassic limestones and the Chalk , and thus have a general northerly or north- easterly trend . We cannot doubt that the present irregularities of the surface are the result of long - con- tinued ...
Page 86
... developed , but their faces are now turned in opposite directions . Fig . 21 shows the geological structure of a portion of Ayrshire . Here we have a series of hard volcanic rocks ( v2 ) , old lavas , in fact , intercalated between ...
... developed , but their faces are now turned in opposite directions . Fig . 21 shows the geological structure of a portion of Ayrshire . Here we have a series of hard volcanic rocks ( v2 ) , old lavas , in fact , intercalated between ...
Page 115
... develop into val- leys ; while the synclines , on the other hand , have experienced less erosion , those with approximately vertical axes appearing as dominant heights . Excellent examples of the same phenomena are furnished by the ...
... develop into val- leys ; while the synclines , on the other hand , have experienced less erosion , those with approximately vertical axes appearing as dominant heights . Excellent examples of the same phenomena are furnished by the ...
Page 117
... develop into hills . In point of fact , unsymmetrically folded strata behave very much in the same way as beds having a persistent dip in one direction . When the anticlines have been truncated the strata appear at the surface as a ...
... develop into hills . In point of fact , unsymmetrically folded strata behave very much in the same way as beds having a persistent dip in one direction . When the anticlines have been truncated the strata appear at the surface as a ...
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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