Earth Sculpture; Or, The Origin of Land-forms |
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Page xiii
... Schists , etc. • 169 · 170 170 175 176 . 177 188 . . . 189 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 ...
... Schists , etc. • 169 · 170 170 175 176 . 177 188 . . . 189 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 ...
Page 5
... schist , clay - slate , etc. The derivative rocks , with which in many regions . igneous rocks are associated , occupy by far the larger portion of the land - surface , entering abundantly into the composition of low grounds and ...
... schist , clay - slate , etc. The derivative rocks , with which in many regions . igneous rocks are associated , occupy by far the larger portion of the land - surface , entering abundantly into the composition of low grounds and ...
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 ...
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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