Economic Geology Or Geology in Its Relations to the Arts and ManufacturesBlackwood & Sons, 1874 - 336 páginas |
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Palavras e frases frequentes
abundant abundantly admixture alum alumina amount antimony arsenic artificial arts and manufactures basalts beds bismuth bituminous blocks Britain calcareous carbonate carbonic acid Carboniferous cements chalk chalybeate chemical chiefly chloride clay coal colour compact composition consists containing copper crust crystalline deposits Derbyshire districts durable earth employed engineer extensively felspar fire-clay fissures formations geologist Geology gold granites greenstones grits gypsum hard heat hydraulic igneous ingredients iron ironstones known lignites lime limestones lustre magnesia manganese manures marbles masses material metamorphic mineral and metallic mortar nature obtained occasionally occur Oolite ornamental oxide peat pigments polishing porphyries potash powder preparation purposes pyrites quarries quartz require rocks saline salts sand sandstones schists shales silica Silurian silver soda sodium soft soils specific gravity springs stones strata stratified structure substances sulphate sulphide sulphuric acid surface tertiary texture thickness tion tons usually varied varieties various veins volcanic yellow yield zinc
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