The Student's Handbook of Physical Geology |
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Page 18
... rise and fall of water relatively to land . " He concludes that the mass of the earth " is on the whole more rigid than a con- tinuous solid globe of glass of the same diameter . " Prof. G. H. Darwin has also investigated the tidal ...
... rise and fall of water relatively to land . " He concludes that the mass of the earth " is on the whole more rigid than a con- tinuous solid globe of glass of the same diameter . " Prof. G. H. Darwin has also investigated the tidal ...
Page 23
... rising in the funnel lights up the vapour - clouds above , and produces the appearance of flames . 4. The lava rises and finds egress either from the crater or from lateral openings . 5. When the flow of lava ceases there is frequently ...
... rising in the funnel lights up the vapour - clouds above , and produces the appearance of flames . 4. The lava rises and finds egress either from the crater or from lateral openings . 5. When the flow of lava ceases there is frequently ...
Page 25
... rising lava prevents the free escape of the steam which is constantly ascending through the mass ; the steam , therefore ... rise , come to assume a spheroidal form ; these are called volcanic bombs . Smaller cindery fragments are termed ...
... rising lava prevents the free escape of the steam which is constantly ascending through the mass ; the steam , therefore ... rise , come to assume a spheroidal form ; these are called volcanic bombs . Smaller cindery fragments are termed ...
Page 31
... which forms the present summit of Etna , did not rise within the old crater , but quite outside its limits . Other cases , in which the volcanic focus has shifted its position , are not rare , CHAP . II . ] 31 VOLCANOES .
... which forms the present summit of Etna , did not rise within the old crater , but quite outside its limits . Other cases , in which the volcanic focus has shifted its position , are not rare , CHAP . II . ] 31 VOLCANOES .
Page 42
... rise to new lakes . Thus enormous masses of land were detached from each side of the deep valley or ravine of Terranuova , and blocked up the course of the river , causing the formation of a large lake . It is stated that about fifty ...
... rise to new lakes . Thus enormous masses of land were detached from each side of the deep valley or ravine of Terranuova , and blocked up the course of the river , causing the formation of a large lake . It is stated that about fifty ...
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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