The Student's Handbook of Physical Geology |
From inside the book
Results 1-5 of 86
Page 9
... less than 26.5 miles . That is to say , that the polar axis is almost exactly 26 miles shorter than an equatorial axis or line passing through the centre of the earth from one side of the equator to the other : or , again , as ...
... less than 26.5 miles . That is to say , that the polar axis is almost exactly 26 miles shorter than an equatorial axis or line passing through the centre of the earth from one side of the equator to the other : or , again , as ...
Page 12
... less than the average , but there are many causes which would tend to produce variations in the rate at which the temperature increases downwards . Some of the earliest observations on the internal tem- perature of the earth were made ...
... less than the average , but there are many causes which would tend to produce variations in the rate at which the temperature increases downwards . Some of the earliest observations on the internal tem- perature of the earth were made ...
Page 15
... less oxidizable metals than are found at the surface . The densities of the principal metals are as follows : Metal . Platinum Gold . Mercury Lead Sp . Gr . 21.5 Metal . Silver 19.3 Copper . 13.6 Iron 11.3 Zinc Sp . Gr . 10.5 8.9 7.8 ...
... less oxidizable metals than are found at the surface . The densities of the principal metals are as follows : Metal . Platinum Gold . Mercury Lead Sp . Gr . 21.5 Metal . Silver 19.3 Copper . 13.6 Iron 11.3 Zinc Sp . Gr . 10.5 8.9 7.8 ...
Page 18
... less than 800 or 1,000 miles at the present time , and that it had probably united itself to the internal nucleus . He bases his opinion on the ground that the movements of precession and nutation could not be as they are , unless the ...
... less than 800 or 1,000 miles at the present time , and that it had probably united itself to the internal nucleus . He bases his opinion on the ground that the movements of precession and nutation could not be as they are , unless the ...
Page 29
... less irregular in thickness , but dipping uniformly on all sides away from the vent , with an incli- nation corresponding exactly to the external slopes of the mountain . " The eruptions of Vesuvius seem very rarely to have taken place ...
... less irregular in thickness , but dipping uniformly on all sides away from the vent , with an incli- nation corresponding exactly to the external slopes of the mountain . " The eruptions of Vesuvius seem very rarely to have taken place ...
Other editions - View all
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