Earth Sculpture; Or, The Origin of Land-forms |
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Page 32
... gradually removed ; while in other cases the contour of the ground has been nota- bly affected by the collapse of underground channels and chambers . But if the results of the chemical action of meteoric water be most evident in places ...
... gradually removed ; while in other cases the contour of the ground has been nota- bly affected by the collapse of underground channels and chambers . But if the results of the chemical action of meteoric water be most evident in places ...
Page 35
... gradually deepened and widened . Some of the transported material is held in solution , part is carried in mechanical suspension , and another portion is pushed and rolled forward on the bed . It is the solid ingredients , of course ...
... gradually deepened and widened . Some of the transported material is held in solution , part is carried in mechanical suspension , and another portion is pushed and rolled forward on the bed . It is the solid ingredients , of course ...
Page 41
... gradually piled up , layer upon layer , on the floor of the sea . Every bed of sedimentary rock , in short , is evidence of denudation . Further , it has been ascertained that in the build- ing up of the various great geological systems ...
... gradually piled up , layer upon layer , on the floor of the sea . Every bed of sedimentary rock , in short , is evidence of denudation . Further , it has been ascertained that in the build- ing up of the various great geological systems ...
Page 46
... gradually developed . The history of the denudation of a land - surface is in truth often highly complicated and hard to read . Many factors have aided in determining the final re- sults of erosion , and it is not always possible to ...
... gradually developed . The history of the denudation of a land - surface is in truth often highly complicated and hard to read . Many factors have aided in determining the final re- sults of erosion , and it is not always possible to ...
Page 55
... impossible that so thick a mass of materials could accumulate in a shallow sea . The explanation , however , is simple enough - sub- sidence kept pace with sedimentation . Slowly and gradually the LAND - FORMS IN HORIZONTAL STRATA 55.
... impossible that so thick a mass of materials could accumulate in a shallow sea . The explanation , however , is simple enough - sub- sidence kept pace with sedimentation . Slowly and gradually the LAND - FORMS IN HORIZONTAL STRATA 55.
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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