Earth Sculpture; Or, The Origin of Land-forms |
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Page 55
... Carboniferous down to Eocene times . At the beginning of the Carboniferous Period the district formed a portion of the sea - floor , and similar marine conditions obtained during the deposi- tion of all the succeeding systems of strata ...
... Carboniferous down to Eocene times . At the beginning of the Carboniferous Period the district formed a portion of the sea - floor , and similar marine conditions obtained during the deposi- tion of all the succeeding systems of strata ...
Page 58
... Carboniferous strata occupy the surface . DIAGRAMMATIC SECTION ACROSS COLORADO PLATEAU . C , Carboniferous strata ; 7 , younger strata ; a ... b , level formerly attained by plateau ; tt , remnants of the younger strata T. FIG . 9 . As ...
... Carboniferous strata occupy the surface . DIAGRAMMATIC SECTION ACROSS COLORADO PLATEAU . C , Carboniferous strata ; 7 , younger strata ; a ... b , level formerly attained by plateau ; tt , remnants of the younger strata T. FIG . 9 . As ...
Page 59
... Carboniferous rocks and the strata at 7 , of which they are detached outliers . The dotted line ( a - b ) indicates the level originally attained by the plateau . All the rock that formerly existed between a - b and the surface of the ...
... Carboniferous rocks and the strata at 7 , of which they are detached outliers . The dotted line ( a - b ) indicates the level originally attained by the plateau . All the rock that formerly existed between a - b and the surface of the ...
Page 67
... Carboniferous rocks , while the latter themselves were planed down to a flat expanse . This Carboniferous platform served for a long time as a base - level of erosion . The horizontal masses under which it lay buried were first deeply ...
... Carboniferous rocks , while the latter themselves were planed down to a flat expanse . This Carboniferous platform served for a long time as a base - level of erosion . The horizontal masses under which it lay buried were first deeply ...
Page 86
... Carboniferous strata ; v , volcanic rocks ; p , Permian sandstones . strongly and form escarpments , but these look away from and not towards each other . In regions which have experienced much denuda- tion , gently inclined strata ...
... Carboniferous strata ; v , volcanic rocks ; p , Permian sandstones . strongly and form escarpments , but these look away from and not towards each other . In regions which have experienced much denuda- tion , gently inclined strata ...
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Common terms and phrases
accumulation Alpine Alps anticlines basalt base-level basins become beds boulder-clay Carboniferous character cirques cliffs coast-lines coasts configuration Cretaceous crust crustal movements crystalline débris denudation deposits depressions depth detritus direction dislocations drainage elevation epigene epigene action epigene agents eroded escarpments feet fiords flow fluvio-glacial fluvio-glacial deposits folds gently geological structure glacial action glacial erosion glaciers gradually ground-moraines hills hollows horizontal strata ice-flow ice-sheet igneous rocks inclined indented infrequently irregular islands joints kind laccoliths lakes land land-forms land-surface lava less limestone low grounds materials mer de glace modified moraines mountain-chain mountain-valleys mountains névé normal faults Old Red Sandstone outcrops owe their origin plain of erosion plateau regions relatively result ridges rock-basins rock-masses sand Sandstone schistose schists Section sediment slopes Southern Uplands strata streams and rivers superficial surface surface-features synclinal tectonic tend thickness tion tracts traversed underground undulating usually valleys vertical volcanic wind