Earth Sculpture; Or, The Origin of Land-forms |
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Page 8
... considerable areas of the earth's surface the derivative rocks show the same horizontal arrangement , a struct- ure which is obviously original . And this is frequently the case with younger and older sedimentary strata alike . Here ...
... considerable areas of the earth's surface the derivative rocks show the same horizontal arrangement , a struct- ure which is obviously original . And this is frequently the case with younger and older sedimentary strata alike . Here ...
Page 10
... considerably in width . In the region represented by Fig . 2 we have an area six miles in breadth , consisting of a thick series of strata disposed in the form of one sin- gle arch or anticline ; while in Fig . 3 , representing B FIG ...
... considerably in width . In the region represented by Fig . 2 we have an area six miles in breadth , consisting of a thick series of strata disposed in the form of one sin- gle arch or anticline ; while in Fig . 3 , representing B FIG ...
Page 14
... 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 strata as are to be met ...
... 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 strata as are to be met ...
Page 15
... considerable thickness of rock has vanished . Were the missing continuations of the strata to be replaced upon the high side of the fault , they would occupy the space contained within the dotted lines above the present surface A - B ...
... considerable thickness of rock has vanished . Were the missing continuations of the strata to be replaced upon the high side of the fault , they would occupy the space contained within the dotted lines above the present surface A - B ...
Page 29
... considerably in the work of destruction . There can be no doubt , for example , that worms , as Darwin has shown , play an important part in the form- ation of soil , which is simply rotted rock plus organic matter . We see , then ...
... considerably in the work of destruction . There can be no doubt , for example , that worms , as Darwin has shown , play an important part in the form- ation of soil , which is simply rotted rock plus organic matter . We see , then ...
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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