Earth Sculpture; Or, The Origin of Land-forms |
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Page 10
... vary 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 ...
... vary 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 ...
Page 20
... vary in texture from compact to coarse- grained ; yet others are built up wholly of crystalline substances , and may be fine - grained or very coarsely granular , as granite . The crystalline schists are equally variable as regards ...
... vary in texture from compact to coarse- grained ; yet others are built up wholly of crystalline substances , and may be fine - grained or very coarsely granular , as granite . The crystalline schists are equally variable as regards ...
Page 22
... vary in character from soft earthy marls and chalks to hard , granular , crystalline limestones and saccharoid marbles . Some are nearly pure carbonate of lime ; others contain larger or smaller percentages of quartz , clay , iron ...
... vary in character from soft earthy marls and chalks to hard , granular , crystalline limestones and saccharoid marbles . Some are nearly pure carbonate of lime ; others contain larger or smaller percentages of quartz , clay , iron ...
Page 26
... vary from less than an inch up to many feet , or even yards , in thickness . Some granites , for example , are reduced to a kind of gritty clay which may be dug with a spade . Argillaceous and silicious rocks are not so readily affected ...
... vary from less than an inch up to many feet , or even yards , in thickness . Some granites , for example , are reduced to a kind of gritty clay which may be dug with a spade . Argillaceous and silicious rocks are not so readily affected ...
Page 37
... varies with the season of the year in each individual river , while different rivers . yield very different results . But even in the case of the least active streams the transported material is much more considerable than might have ...
... varies with the season of the year in each individual river , while different rivers . yield very different results . But even in the case of the least active streams the transported material is much more considerable than might have ...
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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