Earth Sculpture; Or, The Origin of Land-forms |
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Page 1
... existence under the operation of forces which had long ago ceased to affect the earth's crust to any marked extent . It is not , hard to understand how this conception arose . The earlier observers could not fail to be impressed by the ...
... existence under the operation of forces which had long ago ceased to affect the earth's crust to any marked extent . It is not , hard to understand how this conception arose . The earlier observers could not fail to be impressed by the ...
Page 27
... been formed for the most part only since the disappearance of glacial condi- tions , while in southern regions rock - decay has gone on without interruption ever since those lands came into existence AGENTS OF DENUDATION 27.
... been formed for the most part only since the disappearance of glacial condi- tions , while in southern regions rock - decay has gone on without interruption ever since those lands came into existence AGENTS OF DENUDATION 27.
Page 28
James Geikie. on without interruption ever since those lands came into existence . The disintegrating action of rain in temperate and high latitudes is greatly aided by frost , and the same is the case in the elevated tracts of more ...
James Geikie. on without interruption ever since those lands came into existence . The disintegrating action of rain in temperate and high latitudes is greatly aided by frost , and the same is the case in the elevated tracts of more ...
Page 43
... existence of sedimentary strata implies denudation of land - areas - denudation and sedimentation go hand in hand . When we bear in mind that the average thickness of the sedimentary rocks which overspread so large an area of the dry ...
... existence of sedimentary strata implies denudation of land - areas - denudation and sedimentation go hand in hand . When we bear in mind that the average thickness of the sedimentary rocks which overspread so large an area of the dry ...
Page 46
... existence without deflecting the rivers across whose valleys they may seem at one time to have extended - for the rivers have simply sawed their way through the ridges as these were being gradually developed . The history of the ...
... existence without deflecting the rivers across whose valleys they may seem at one time to have extended - for the rivers have simply sawed their way through the ridges as these were being gradually developed . The history 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