The Student's Handbook of Physical GeologyG. Bell and Sons, 1884 - 514 pages |
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Page 4
... remains , as they occur in a fossil state , is even more necessary for a geologist than a knowledge of inorganic substances . The cause of this necessity may be briefly stated as follows . When portions of the earth's crust came to be ...
... remains , as they occur in a fossil state , is even more necessary for a geologist than a knowledge of inorganic substances . The cause of this necessity may be briefly stated as follows . When portions of the earth's crust came to be ...
Page 25
... remains in the fissures and cavities where the com- bination takes place , the water is evaporated , and the sul- phuric acid forms sulphates by combining with lime , iron , soda , and other substances . 2. Fragmental Products . - The ...
... remains in the fissures and cavities where the com- bination takes place , the water is evaporated , and the sul- phuric acid forms sulphates by combining with lime , iron , soda , and other substances . 2. Fragmental Products . - The ...
Page 26
... heat , so , when the crust has once formed , the internal portion of the lava- stream always remains hot for a long period of time . The process of solidification is , therefore , a very gradual 26 [ SEC . I. INFLUENCE OF INTERNAL CAUSES .
... heat , so , when the crust has once formed , the internal portion of the lava- stream always remains hot for a long period of time . The process of solidification is , therefore , a very gradual 26 [ SEC . I. INFLUENCE OF INTERNAL CAUSES .
Page 35
... remains of the plug of lava in the crater ) , surrounded by shoals of scoriæ and sand . During the gradual building up of such a submarine volcano , the lava - streams and fragmental materials which are ejected into deep water , are ...
... remains of the plug of lava in the crater ) , surrounded by shoals of scoriæ and sand . During the gradual building up of such a submarine volcano , the lava - streams and fragmental materials which are ejected into deep water , are ...
Page 36
... remains are liable to be enclosed . and will testify by their presence to the conditions under which the stratified masses have been accumulated . Many of the solitary volcanic islands which occur in the midst of the Pacific and Indian ...
... remains are liable to be enclosed . and will testify by their presence to the conditions under which the stratified masses have been accumulated . Many of the solitary volcanic islands which occur in the midst of the Pacific and Indian ...
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Common terms and phrases
accumulated acid action alumina amount angles anticlinal augite basalt beds blocks bottom calcareous called carbonate of lime chalk chemical clay cleavage cliffs coal coast colour consist containing coral cracks crystalline crystals deposits depth described detrition distance district dolerite Dolomite dykes earth elevation erosion fault feet felspar fissures Foraminifera formation formed fragments frequently Geol glacier glauconite gradually granite greensand ground hills horizontal hornblende igneous rocks iron island joints Jukes lake land lava layers less Leucite limestone magnesia mass material matter metamorphic metamorphic rocks mica miles mineral mountain occur origin Orthoclase outcrops oxides particles pebbles planes porphyritic portion present pressure produced quartz rain reef river salt sand sandstone shale shells shore side silicate silicate of alumina slope solid solution sometimes stone strata stratified rocks stream structure substances sulphate surface thickness tide tion tuffs valley vertical volcanic waves