Economic Geology: Or, Geology in Its Relations to the Arts and ManufacturesW. Blackwood and sons, 1874 - 336 páginas |
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Página 20
... appear in various colours . 66 Calc - tuff and Calc - sinter are precipitates or deposits from calcareous waters , and appear as porous , incrusting , stalactitic , and stalagmitic masses . Marl is a loose application for all friable ...
... appear in various colours . 66 Calc - tuff and Calc - sinter are precipitates or deposits from calcareous waters , and appear as porous , incrusting , stalactitic , and stalagmitic masses . Marl is a loose application for all friable ...
Página 62
... appearing in the cross fracture like cuneiform letters . It is found in Banffshire , in the Urals , and other localities , but from its rarity and small size is used only for minor ornaments . Generally speaking , the granites are too ...
... appearing in the cross fracture like cuneiform letters . It is found in Banffshire , in the Urals , and other localities , but from its rarity and small size is used only for minor ornaments . Generally speaking , the granites are too ...
Página 63
... appear in many tints - red , flesh - coloured , fawn - coloured , black , bluish - black , and bluish- green ; and both varieties may contain , in subordinate quanti- ties , other crystals than those enumerated above . Some fine ...
... appear in many tints - red , flesh - coloured , fawn - coloured , black , bluish - black , and bluish- green ; and both varieties may contain , in subordinate quanti- ties , other crystals than those enumerated above . Some fine ...
Página 70
... appear in tints varying from the purest white to creamy yellow , are fine and rather soft in texture , but harden on exposure to the weather . The white rock of Cullalo ( used in Fettes Hospital , Edinburgh ) is an excellent stone , and ...
... appear in tints varying from the purest white to creamy yellow , are fine and rather soft in texture , but harden on exposure to the weather . The white rock of Cullalo ( used in Fettes Hospital , Edinburgh ) is an excellent stone , and ...
Página 71
... appear in various tints - light - red , brownish - grey , white , and whitish- yellow - are of varied texture and consistency , and , in conse- quence , of as varied durability . Many of the lower beds are soft , mottled , and worthless ...
... appear in various tints - light - red , brownish - grey , white , and whitish- yellow - are of varied texture and consistency , and , in conse- quence , of as varied durability . Many of the lower beds are soft , mottled , and worthless ...
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Economic Geology: Or, Geology in Its Relations to the Arts and Manufactures David Page Visualização integral - 1874 |
Economic Geology: Or, Geology in Its Relations to the Arts and Manufactures David Page Visualização integral - 1874 |
Economic Geology: Or, Geology in Its Relations to the Arts and Manufactures David Page Visualização integral - 1874 |
Palavras e frases frequentes
abundance admixture agricultural alumina amount antimony arsenic arts and manufactures basalts beds bismuth bituminous blocks Britain calcareous carbonate carbonic acid Carboniferous cements chalk chemical chiefly chloride clay clayey coal colour compact composition consists containing copper crust crystalline crystals deposits districts durable earth employed engineer felspar fire-clays formations geologist Geology gold granites gravels Greensand greenstones grits gypsum hard heat hence hornblende igneous ingredients iron ironstones known largely lignites lime limestones lustre magnesia manganese manures marbles marls masses material metamorphic mineral and metallic mortar nature obtained occasionally occur Oolite ornamental oxide peat phosphate pigments polish porphyries potash preparation purposes pyrites quarries quartz require rocks saline salts sand sandstones schists serpentines shales silica Silurian silver soda sodium soft soils specific gravity stones strata stratified structure subsoils substances sulphate sulphide sulphuric acid surface tellurium tertiary texture thickness tion tons usually varieties various vary veins volcanic yield zinc