Earth Sculpture; Or, The Origin of Land-forms |
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Page ix
... Extent of the old Inland Ice - Glacial character of Boulder - clay - Central Region of Glacial Erosion and Peripheral Area of Glacial Accumulation — Fluvio- glacial deposits - Loess , origin of its materials - Glaciation of North ...
... Extent of the old Inland Ice - Glacial character of Boulder - clay - Central Region of Glacial Erosion and Peripheral Area of Glacial Accumulation — Fluvio- glacial deposits - Loess , origin of its materials - Glaciation of North ...
Page 1
... extent . It is not , hard to understand how this conception arose . The earlier observers could not fail to be impressed by the evidence of former crustal disturbances which almost everywhere . stared them in the face . Here they saw ...
... extent . It is not , hard to understand how this conception arose . The earlier observers could not fail to be impressed by the evidence of former crustal disturbances which almost everywhere . stared them in the face . Here they saw ...
Page 12
... extent of , say , 500 feet , for it is obvious that the coal and fireclay ( 8 , 9 ) , and the strata amongst which they lie on the left - hand side , were formerly continuous with the corresponding beds on the other side of the fault ...
... extent of , say , 500 feet , for it is obvious that the coal and fireclay ( 8 , 9 ) , and the strata amongst which they lie on the left - hand side , were formerly continuous with the corresponding beds on the other side of the fault ...
Page 13
... extent with the main flexures and displace- ments of the underlying rocks . In many elevated tracts , however , composed of highly disturbed and contorted strata , no such coincidence of surface - feat- ure and underground structure can ...
... extent with the main flexures and displace- ments of the underlying rocks . In many elevated tracts , however , composed of highly disturbed and contorted strata , no such coincidence of surface - feat- ure and underground structure can ...
Page 25
... extent removed , while the insoluble silicate of alumina , or clay , remains be- hind . Such insoluble materials are frequently stained yellow - brown or red , owing to the pressure of iron- oxides . In this way felspathic rocks ...
... extent removed , while the insoluble silicate of alumina , or clay , remains be- hind . Such insoluble materials are frequently stained yellow - brown or red , owing to the pressure of iron- oxides . In this way felspathic rocks ...
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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