Earth Sculpture; Or, The Origin of Land-forms |
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Page 4
... and - by we shall learn that igneous and derivative rocks have in certain regions been subjected to many remarkable changes , and are in consequence so altered that it is often hard to detect their original 4 EARTH SCULPTURE.
... and - by we shall learn that igneous and derivative rocks have in certain regions been subjected to many remarkable changes , and are in consequence so altered that it is often hard to detect their original 4 EARTH SCULPTURE.
Page 12
... - floor have been pushed up from below and converted into dry land . Both changes appear to have taken place . The bed of the sea has sunk from time to time to greater and greater depths , and has thus 12 EARTH SCULPTURE.
... - floor have been pushed up from below and converted into dry land . Both changes appear to have taken place . The bed of the sea has sunk from time to time to greater and greater depths , and has thus 12 EARTH SCULPTURE.
Page 18
... change . How , then , are rocks being affected at present ? We do not pro- ceed far in our investigation before we discover that they are everywhere becoming disintegrated . place they are breaking up into angular fragments ; in another ...
... change . How , then , are rocks being affected at present ? We do not pro- ceed far in our investigation before we discover that they are everywhere becoming disintegrated . place they are breaking up into angular fragments ; in another ...
Page 19
... change . As these agents are often associated in their work , it is sometimes hard , or even impossible , to say which has played the most effective part in the demolition of rocks . Nevertheless , it will conduce to clearness if we ...
... change . As these agents are often associated in their work , it is sometimes hard , or even impossible , to say which has played the most effective part in the demolition of rocks . Nevertheless , it will conduce to clearness if we ...
Page 23
... changes of temperature - warmed by day and during summer , cooled at night and during win- ter . Thus they alternately expand and contract , and this tends to disintegration , for the materials of which they are composed often yield ...
... changes of temperature - warmed by day and during summer , cooled at night and during win- ter . Thus they alternately expand and contract , and this tends to disintegration , for the materials of which they are composed often yield ...
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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