Earth Sculpture; Or, The Origin of Land-forms |
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Page 5
... as consisting of a series of larger and smaller lenticular sheets , irregularly distributed over ' See Appendix for Table of Geological Systems . the earth's surface . The various systems thus fre quently INTRODUCTORY 5.
... as consisting of a series of larger and smaller lenticular sheets , irregularly distributed over ' See Appendix for Table of Geological Systems . the earth's surface . The various systems thus fre quently INTRODUCTORY 5.
Page 6
... various origin , some of them being primarily of igneous and others of aqueous formation . Those which form the nuclei of the youngest mountain chains are sometimes of relatively recent age , while those occupying such broad tracts as ...
... various origin , some of them being primarily of igneous and others of aqueous formation . Those which form the nuclei of the youngest mountain chains are sometimes of relatively recent age , while those occupying such broad tracts as ...
Page 8
... various kinds of sediment 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 ...
... various kinds of sediment 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 ...
Page 19
... various origin -igneous , derivative , and metamorphic . It is now necessary to consider their composition and structure , for , according as these differ , rocks are variously affected by epigene agents , some yielding rapidly , others ...
... various origin -igneous , derivative , and metamorphic . It is now necessary to consider their composition and structure , for , according as these differ , rocks are variously affected by epigene agents , some yielding rapidly , others ...
Page 20
... various ferro - magnesian silicates , such as mica , py- roxene , hornblende , and olivine ( aluminous silicates of magnesia , lime , iron - oxides , etc. ) , and quartz ( silica , silicic acid ) . The crystalline igneous rocks occur ...
... various ferro - magnesian silicates , such as mica , py- roxene , hornblende , and olivine ( aluminous silicates of magnesia , lime , iron - oxides , etc. ) , and quartz ( silica , silicic acid ) . The crystalline igneous rocks occur ...
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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