Earth Sculpture; Or, The Origin of Land-forms |
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Page 1
... fractured , contorted , and jum- bled rock - masses ; there , again , they encountered the relics of vast volcanic eruptions in regions now practi- cally free from earth - throes of any kind . In one place . ancient land - surfaces were ...
... fractured , contorted , and jum- bled rock - masses ; there , again , they encountered the relics of vast volcanic eruptions in regions now practi- cally free from earth - throes of any kind . In one place . ancient land - surfaces were ...
Page 13
... fracture and displacement . Obviously , then , the mysterious subterranean forces . must have played an important part in the formation of earth - features . Disturbed rocks are of more fre- quent occurrence than strata which have ...
... fracture and displacement . Obviously , then , the mysterious subterranean forces . must have played an important part in the formation of earth - features . Disturbed rocks are of more fre- quent occurrence than strata which have ...
Page 14
... fractures . Again , many considerable mountains are built up of rocks which are not convoluted at all , but arranged in horizontal beds . More than this , many plateaux and even lowlands are composed of as highly flexed and con- torted ...
... fractures . Again , many considerable mountains are built up of rocks which are not convoluted at all , but arranged in horizontal beds . More than this , many plateaux and even lowlands are composed of as highly flexed and con- torted ...
Page 47
... fractured and folded strata enables us vividly to realise the fact that hypogene action has played a prominent part in the evolution of land - forms . Not only are many inequalities of the surface the di- rect result of that action ...
... fractured and folded strata enables us vividly to realise the fact that hypogene action has played a prominent part in the evolution of land - forms . Not only are many inequalities of the surface the di- rect result of that action ...
Page 48
... fractured ; and between these two extremes are many gradations . The various structures assumed by disturbed rock- masses show that crustal movements are of two kinds , horizontal and vertical . Folding and its accompany- ing phenomena ...
... fractured ; and between these two extremes are many gradations . The various structures assumed by disturbed rock- masses show that crustal movements are of two kinds , horizontal and vertical . Folding and its accompany- ing phenomena ...
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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