Earth Sculpture; Or, The Origin of Land-forms |
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Page 2
... approximately stable - the occasional earthquakes and volcanic disturbances of recent times being looked upon as only the final manifestations of those forces which in earlier ages had been mainly instrumental in producing the varied ...
... approximately stable - the occasional earthquakes and volcanic disturbances of recent times being looked upon as only the final manifestations of those forces which in earlier ages had been mainly instrumental in producing the varied ...
Page 8
... 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 frequently the case with younger ...
... 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 frequently the case with younger ...
Page 9
... approximately horizontal , but from this point they dip on the right towards B , and on the left in the direction of A. Note further that the angle of inclination is the same on each side of the anticline ; in other words , the ...
... approximately horizontal , but from this point they dip on the right towards B , and on the left in the direction of A. Note further that the angle of inclination is the same on each side of the anticline ; in other words , the ...
Page 21
... approximately right angles to the planes of bed- ding . In certain fine - grained rocks , such as basalt , the jointing is often very regular , giving rise to a prismatic columnar structure , as in the basalts of Staffa and the Giant's ...
... approximately right angles to the planes of bed- ding . In certain fine - grained rocks , such as basalt , the jointing is often very regular , giving rise to a prismatic columnar structure , as in the basalts of Staffa and the Giant's ...
Page 49
... approximately horizontal strata . This is the simplest kind of geological structure : the tale it tells is not hard to read . We can follow it from first to last in all its details . But if we succeed in grasping what is meant by the ...
... approximately horizontal strata . This is the simplest kind of geological structure : the tale it tells is not hard to read . We can follow it from first to last in all its details . But if we succeed in grasping what is meant by the ...
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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