The Student's Handbook of Physical GeologyG. Bell and Sons, 1884 - 514 pages |
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Page 5
... surface is being modified . Again , before we can attempt to construct any history of the formation of the earth's crust we must be acquainted with the leading facts and conclusions of Palæontology , as that branch of the science is ...
... surface is being modified . Again , before we can attempt to construct any history of the formation of the earth's crust we must be acquainted with the leading facts and conclusions of Palæontology , as that branch of the science is ...
Page 9
... surface of this sphere would lie at the depth of 70,000 feet below the actual surface at the equator . Now the deepest soundings in the ocean are less than 30,000 feet , and the highest mountain in the world , viz . , Mount Everest in ...
... surface of this sphere would lie at the depth of 70,000 feet below the actual surface at the equator . Now the deepest soundings in the ocean are less than 30,000 feet , and the highest mountain in the world , viz . , Mount Everest in ...
Page 13
... surface temperature in this instance to be 49 ° F. , these observations show an average increment of 1 ° for every 54 feet of depth . While , then , there is some variation in the rate of this increase at different places , it is an ...
... surface temperature in this instance to be 49 ° F. , these observations show an average increment of 1 ° for every 54 feet of depth . While , then , there is some variation in the rate of this increase at different places , it is an ...
Page 15
... surface . For if the density increased in direct proportion to the pressure , i.e. if the density was doubled by doubling the pressure , it has been calculated that at the centre of the globe cold steel would be compressed into a fourth ...
... surface . For if the density increased in direct proportion to the pressure , i.e. if the density was doubled by doubling the pressure , it has been calculated that at the centre of the globe cold steel would be compressed into a fourth ...
Page 17
... surface . It does not follow , however , as a necessary consequence that the materials which exist at these great depths would be melted at the same temperature that would fuse them at the surface , since the enormous pressure which ...
... surface . It does not follow , however , as a necessary consequence that the materials which exist at these great depths would be melted at the same temperature that would fuse them at the surface , since the enormous pressure which ...
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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 carbonic acid chalk chemical clay cleavage cliffs coal coast colour consist containing coral cracks crystalline crystals denudation deposits depth described detrition distance district dolerite dykes earth earth's crust elevation erosion excavated fault feet felspar fissures Foraminifera formation formed fragments Geol glacier glauconite gradually granite greensand ground hills horizontal hornblende igneous rocks island joints Jukes lake land lava layers less limestone magnesia mass material matter metamorphic metamorphic rocks mica miles mineral mountain observed occur origin Orthoclase outcrops particles pebbles planes porphyritic portion present pressure produced quartz rain reef river salt sand sandstone shales shells shore side siliceous Silurian slope solid solution sometimes stones strata stratified rocks stream structure sulphate surface synclinal thickness tide tion Trans valley vertical volcanic waves