Earth Sculpture; Or, The Origin of Land-forms |
From inside the book
Page 69
... basalts with thin intervening layers of tuff ( volcanic dust , etc. ) arranged in ap- proximately horizontal strata ... basalt with intervening layers of tuff . Length of section 5 miles . Krannafield Coal Stream 27 ° or even 30 ° . In ...
... basalts with thin intervening layers of tuff ( volcanic dust , etc. ) arranged in ap- proximately horizontal strata ... basalt with intervening layers of tuff . Length of section 5 miles . Krannafield Coal Stream 27 ° or even 30 ° . In ...
Page 88
... basalt . to consider the surface - forms yielded by steeply in- clined and highly folded strata . In regions long exposed to denudation all weakly built hills tend to disappear . Hence in such countries Now and anticlinal hills are of ...
... basalt . to consider the surface - forms yielded by steeply in- clined and highly folded strata . In regions long exposed to denudation all weakly built hills tend to disappear . Hence in such countries Now and anticlinal hills are of ...
Page 136
... basalt ; a , agglomerate , etc. in that quarter that we meet with the most extensive and continu- ous accumulations of Old Red Sandstone rocks . Be that as it may , we know that some time before the succeeding Carbon- iferous period re ...
... basalt ; a , agglomerate , etc. in that quarter that we meet with the most extensive and continu- ous accumulations of Old Red Sandstone rocks . Be that as it may , we know that some time before the succeeding Carbon- iferous period re ...
Page 174
... basalt have their deep - seated equivalents in the plu- tonic granites , syenites , and gabbros . That is to say , we know that the same molten mass solidifies at great depths as granite or other wholly crystalline rock , and at the ...
... basalt have their deep - seated equivalents in the plu- tonic granites , syenites , and gabbros . That is to say , we know that the same molten mass solidifies at great depths as granite or other wholly crystalline rock , and at the ...
Page 186
... basalt - plains of Western North America , which occupy a larger area than France and Great Britain , are the products of such massive eruptions , the lavas reaching an average thickness of 2000 feet . The older basalts of Iceland , the ...
... basalt - plains of Western North America , which occupy a larger area than France and Great Britain , are the products of such massive eruptions , the lavas reaching an average thickness of 2000 feet . The older basalts of Iceland , the ...
Other editions - View all
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