Earth Sculpture; Or, The Origin of Land-forms |
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Page xiii
... Schists , etc. 74. Diagrammatic Section of a Laccolith showing Dome - shaped Eleva- tion of Surface above the Intrusive Rock ( after G. K. Gilbert ) View of Necks - Cores of old Volcanoes ( Powell ) 75 . 76. Section of Highly Denuded ...
... Schists , etc. 74. Diagrammatic Section of a Laccolith showing Dome - shaped Eleva- tion of Surface above the Intrusive Rock ( after G. K. Gilbert ) View of Necks - Cores of old Volcanoes ( Powell ) 75 . 76. Section of Highly Denuded ...
Page 6
... separated by a broadly marked line of demarcation from the schists , granites , etc. , upon which they repose . In other cases the sedimentary rocks become gradually altered as they are traced down- wards , 6 EARTH SCULPTURE.
... separated by a broadly marked line of demarcation from the schists , granites , etc. , upon which they repose . In other cases the sedimentary rocks become gradually altered as they are traced down- wards , 6 EARTH SCULPTURE.
Page 7
... schists , penetrated here and there by granitoid igneous rocks . The origin of those ancient crystalline schists has been much discussed , but does not concern us here . Some geologists have maintained that the rocks in question ...
... schists , penetrated here and there by granitoid igneous rocks . The origin of those ancient crystalline schists has been much discussed , but does not concern us here . Some geologists have maintained that the rocks in question ...
Page 16
... schists and other metamorphic rocks has a similar significance . Although the processes by which rocks become so highly altered are still more or less obscure , yet there can be no doubt that the metamorphism had taken place when the ...
... schists and other metamorphic rocks has a similar significance . Although the processes by which rocks become so highly altered are still more or less obscure , yet there can be no doubt that the metamorphism had taken place when the ...
Page 20
... schists are equally variable as regards texture . They differ , however , from the igneous rocks in structure . While the latter are confusedly crystalline , the schists show a kind of streaky structure or pseudo - lamination , their ...
... schists are equally variable as regards texture . They differ , however , from the igneous rocks in structure . While the latter are confusedly crystalline , the schists show a kind of streaky structure or pseudo - lamination , their ...
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Common terms and phrases
accumulation Alpine Alps anticlines basalt base-level basins become beds boulder-clay Carboniferous character cirques cliffs coast-lines coasts configuration Cretaceous crust crustal movements crystalline débris denudation deposits depressions depth detritus direction dislocations drainage elevation epigene epigene action epigene agents eroded escarpments feet fiords flow fluvio-glacial fluvio-glacial deposits folds gently geological structure glacial action glacial erosion glaciers gradually ground-moraines hills hollows horizontal strata ice-flow ice-sheet igneous rocks inclined indented infrequently irregular islands joints kind laccoliths lakes land land-forms land-surface lava less limestone low grounds materials mer de glace modified moraines mountain-chain mountain-valleys mountains névé normal faults Old Red Sandstone outcrops owe their origin plain of erosion plateau regions relatively result ridges rock-basins rock-masses sand sandstone schistose schists SECTION sediment slopes Southern Uplands strata streams and rivers superficial surface surface-features synclinal tectonic tend thickness tion tracts traversed underground undulating usually valleys vertical volcanic wind