Economic Geology: Or, Geology in Its Relations to the Arts and ManufacturesW. Blackwood and sons, 1874 - 336 páginas |
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Página 8
... soft , superficial or deep - seated -sands , sandstones , clays , shales , peats , coals , limestones , ironstones , lavas , basalts , granites . Whatever their mineral character , these rocks are found to occur in two main positions ...
... soft , superficial or deep - seated -sands , sandstones , clays , shales , peats , coals , limestones , ironstones , lavas , basalts , granites . Whatever their mineral character , these rocks are found to occur in two main positions ...
Página 9
... soft and fragment- ary in texture , and frequently imbed the remains of plants and animals . The eruptive rocks , on the other hand , however originating , make their appearance from below , are amor- phous , or occasionally columnar ...
... soft and fragment- ary in texture , and frequently imbed the remains of plants and animals . The eruptive rocks , on the other hand , however originating , make their appearance from below , are amor- phous , or occasionally columnar ...
Página 10
... soft " in b ບ ບ a Simple fissure ; b Fault ; c Soft dyke ; d Hard dyke ; vv Veins . the former instance , and " hard " in the latter - intersecting and interrupting the continuity of the sedimentary strata . Again , when these rents ...
... soft " in b ບ ບ a Simple fissure ; b Fault ; c Soft dyke ; d Hard dyke ; vv Veins . the former instance , and " hard " in the latter - intersecting and interrupting the continuity of the sedimentary strata . Again , when these rents ...
Página 13
... soft , • 7.833 Sulphur , native , tempered , 7.825 fused , • 3.033 1.990 Tellurium , 5.700 to 6.110 Talc , Tin , 7.295 Topaz , Tungstein , • Uranium , Zinc , Mica , 2.650 2.934 Woodstone , Mineral Tallow Naphtha , 17.400 Tourmaline ...
... soft , • 7.833 Sulphur , native , tempered , 7.825 fused , • 3.033 1.990 Tellurium , 5.700 to 6.110 Talc , Tin , 7.295 Topaz , Tungstein , • Uranium , Zinc , Mica , 2.650 2.934 Woodstone , Mineral Tallow Naphtha , 17.400 Tourmaline ...
Página 21
... soft , sectile mineral , readily splitting up into thin transparent plates , and is a chemical compound of silica , mag- nesia , and potash . The glistening scaly crystals in ordinary granites are mica . Mica - schist and Mica - slate ...
... soft , sectile mineral , readily splitting up into thin transparent plates , and is a chemical compound of silica , mag- nesia , and potash . The glistening scaly crystals in ordinary granites are mica . Mica - schist and Mica - slate ...
Outras edições - Ver tudo
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