Earth Sculpture; Or, The Origin of Land-forms |
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Page 8
... arranged in gently in- clined or approximately horizontal layers . Now , over 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 ...
... arranged in gently in- clined or approximately horizontal layers . Now , over 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 ...
Page 9
... arrangement is shown in the next diagram ( Fig . 2 ) . Here the strata are arranged in the form of a truncated arch , or anticline . At X the X The FIG . 2 . SECTION ACROSS AN ANTICLINE . upper continuous line , A - B , = surface of ...
... arrangement is shown in the next diagram ( Fig . 2 ) . Here the strata are arranged in the form of a truncated arch , or anticline . At X the X The FIG . 2 . SECTION ACROSS AN ANTICLINE . upper continuous line , A - B , = surface of ...
Page 14
... arranged in horizontal beds . More than this , many plateaux and even lowlands are composed of as highly flexed and ... arrangement ; and , con- versely , where the strata are trough - shaped the sur- face - feature is not a depression ...
... arranged in horizontal beds . More than this , many plateaux and even lowlands are composed of as highly flexed and ... arrangement ; and , con- versely , where the strata are trough - shaped the sur- face - feature is not a depression ...
Page 20
... arranged in rudely alternate lenticular layers . Igneous rocks and schists are traversed by cracks and fissures which usually ramify irregularly in all directions . In many bedded igneous rocks ( lavas ) , however , these cracks , or ...
... arranged in rudely alternate lenticular layers . Igneous rocks and schists are traversed by cracks and fissures which usually ramify irregularly in all directions . In many bedded igneous rocks ( lavas ) , however , these cracks , or ...
Page 45
... arrangement . Certain rock - structures , as we shall learn , favour denudation , while others are more resisting . So dominant , indeed , has been the influence of geological structure in de- termining the results worked out by erosion ...
... arrangement . Certain rock - structures , as we shall learn , favour denudation , while others are more resisting . So dominant , indeed , has been the influence of geological structure in de- termining the results worked out by erosion ...
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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