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Page 2
... common things , came themselves to be made in the heart of the old solid earth . Then began the science of Geology , the systematic study of the way in which the world is built up , and of the natural changes which go on within it and ...
... common things , came themselves to be made in the heart of the old solid earth . Then began the science of Geology , the systematic study of the way in which the world is built up , and of the natural changes which go on within it and ...
Page 7
... common mineral name . A mole- cule of our typical orthoclase contains 2 atoms of potassium , 2 of aluminium , 6 of silicon , and 16 of oxygen . But in most specimens of orthoclase there are some molecules in which two THE MATERIALS OF ...
... common mineral name . A mole- cule of our typical orthoclase contains 2 atoms of potassium , 2 of aluminium , 6 of silicon , and 16 of oxygen . But in most specimens of orthoclase there are some molecules in which two THE MATERIALS OF ...
Page 8
... common . Again and again their proper form can be seen ; their molecules are clearly capable of building up six - sided plates . This structure is so common that it can- not be accidental ; and careful measures show that the angles of ...
... common . Again and again their proper form can be seen ; their molecules are clearly capable of building up six - sided plates . This structure is so common that it can- not be accidental ; and careful measures show that the angles of ...
Page 9
... common minerals are coloured by some trifling impurity ; a sort of stain runs through them , as it were , and in their pure condition they are colourless . Metallic ores , however , usually have characteristic colours ; thus Iron ...
... common minerals are coloured by some trifling impurity ; a sort of stain runs through them , as it were , and in their pure condition they are colourless . Metallic ores , however , usually have characteristic colours ; thus Iron ...
Page 11
... common occurrence have a specific gravity be- tween 2 and 3.5 . Meerschaum , used for the bowls of pipes , is as low as 1.5 , while Gold is as high as 19.3 , and a native alloy of Platinum and Iridium actually reaches 23 . In the ...
... common occurrence have a specific gravity be- tween 2 and 3.5 . Meerschaum , used for the bowls of pipes , is as low as 1.5 , while Gold is as high as 19.3 , and a native alloy of Platinum and Iridium actually reaches 23 . In the ...
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Common terms and phrases
alluvial alluvium Alps andesite augite banks basalt become beds beneath blocks calcium carbonate Chalk character CHARLES GRIFFIN chemical clay cliffs coast colour cone Cretaceous Crown 8vo crust crystalline crystals denudation deposits dykes earth Engineer Eocene escarpment EXETER STREET feet felspars flint flow folded fossils Fully Illustrated Geol Geology glacier glass gneiss grains granite Handsome Cloth hills hollow Hornblende igneous iron Juras Jurassic lake Lake Bonneville land Large 8vo lava layers Leith Hill limestone LONDON lower marine mass material Mesozoic mica miles minerals Miocene mountain occur orthoclase oxide pebbles plain plane Plates Pliocene Practical produced Professor pyroxene quartz region Revised rhyolite ridge rise river rock round salts sand sandstone SECOND EDITION seen shells side silica slope specific gravity steep stones STRAND strata stream structure summit surface TEXT-BOOK unconformity upper valley volcanic Wealden wind
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