Earth Sculpture; Or, The Origin of Land-forms |
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Page xiii
... Wind Erosion : Harder Beds amongst inclined Cretaceous Strata , Libyan Desert ( J. Walther ) . • • • 254 $ 1 . Wind Erosion : Stages in the Erosion and Reduction of a Table- mountain ( J. Walther ) . 255 84. Advance of Sand - dunes . 86 ...
... Wind Erosion : Harder Beds amongst inclined Cretaceous Strata , Libyan Desert ( J. Walther ) . • • • 254 $ 1 . Wind Erosion : Stages in the Erosion and Reduction of a Table- mountain ( J. Walther ) . 255 84. Advance of Sand - dunes . 86 ...
Page 4
... wind - blown origin— indurated sand - dunes , in short . The igneous rocks consist partly of lavas and frag- mental materials which have been ejected at the sur- face , as in modern volcanoes , and partly of formerly molten masses which ...
... wind - blown origin— indurated sand - dunes , in short . The igneous rocks consist partly of lavas and frag- mental materials which have been ejected at the sur- face , as in modern volcanoes , and partly of formerly molten masses which ...
Page 24
... Wind then catches up the loose ma- terial and sweeps it away , leaving fresh surfaces ex- posed to the destructive action of insolation . More than this , the grit , sand , and dust carried off by the wind are used as a sand - blast to ...
... Wind then catches up the loose ma- terial and sweeps it away , leaving fresh surfaces ex- posed to the destructive action of insolation . More than this , the grit , sand , and dust carried off by the wind are used as a sand - blast to ...
Page 25
... wind tends , in short , to transport all loose material from the scene of its origin to the borders of the desert . In latitudes like our own , insolation doubtless shares in the disintegration of rocks , but the most conspicu- ous ...
... wind tends , in short , to transport all loose material from the scene of its origin to the borders of the desert . In latitudes like our own , insolation doubtless shares in the disintegration of rocks , but the most conspicu- ous ...
Page 28
... wind . The same process takes place on a larger scale in the prizing open of joints and the rending asunder of rocks and rock - masses . Hence in Arctic regions and at high levels in temperate and southern latitudes the wholesale ...
... wind . The same process takes place on a larger scale in the prizing open of joints and the rending asunder of rocks and rock - masses . Hence in Arctic regions and at high levels in temperate and southern latitudes the wholesale ...
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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