The Student's Handbook of Physical GeologyG. Bell, 1892 - 666 pages |
From inside the book
Results 1-5 of 89
Page 11
... sometimes rather more and sometimes rather less than the average , but there are many causes which would tend to produce variations in the rate at which the temperature increases downwards . One of the most important is that of the ...
... sometimes rather more and sometimes rather less than the average , but there are many causes which would tend to produce variations in the rate at which the temperature increases downwards . One of the most important is that of the ...
Page 20
... sometimes isolated mountains like Vesuvius and Etna , but are more frequently arranged as a row of cones and peaks along straight or slightly curved lines , as if they had been thrown up at intervals along the course of great linear ...
... sometimes isolated mountains like Vesuvius and Etna , but are more frequently arranged as a row of cones and peaks along straight or slightly curved lines , as if they had been thrown up at intervals along the course of great linear ...
Page 22
... sometimes issues from this , it more often breaks forth from the flanks of the dome . The lavas ejected from these openings sometimes accumulate till they form a huge mound - shaped mass many thousand feet high , and covering an immense ...
... sometimes issues from this , it more often breaks forth from the flanks of the dome . The lavas ejected from these openings sometimes accumulate till they form a huge mound - shaped mass many thousand feet high , and covering an immense ...
Page 23
... sometimes incessant and of moderate intensity for a long time , then ceasing , and a state of quiescence ensuing , which is broken by a more violent outburst . It has been noticed , indeed , that there is a distinct relation between the ...
... sometimes incessant and of moderate intensity for a long time , then ceasing , and a state of quiescence ensuing , which is broken by a more violent outburst . It has been noticed , indeed , that there is a distinct relation between the ...
Page 24
... sometimes small discharges of this kind are thrown up from points along the fissures which are rent through the mountain . The rise of the lava in the central pipe of the volcano is generally slow , sometimes rising and falling again ...
... sometimes small discharges of this kind are thrown up from points along the fissures which are rent through the mountain . The rise of the lava in the central pipe of the volcano is generally slow , sometimes rising and falling again ...
Other editions - View all
Common terms and phrases
acid action agencies altered alumina amount anticlinal augite basalt beds blocks bottom calcareous calcite called carbonate of lime carbonic acid chalk channel chemical clay cleavage cliffs coast colour consists coral cracks crystalline crystals currents débris denudation deposits depth described detrition distance district dolerite dykes earth earth's crust Edited elevation erosion eruptions fault feet felspar fissures formation formed fragments Geol Geology glacier glauconite gneiss gradually granite greensand ground hills horizontal hornblende igneous rocks iron island Jukes lakes land lava layers limestone magnesia mass material metamorphic mica miles mineral mountain occur original Orthoclase outcrop oxide particles pebbles planes porphyritic portion pressure produced quartz rain reefs ridge rise river sand sandstone schist shale shells shore side siliceous slope soil solution sometimes stones strata stratified rocks stream structure surface thickness tion tract Translated unconformity valley vertical volcanic