Economic Geology: Or, Geology in Its Relations to the Arts and ManufacturesW. Blackwood and sons, 1874 - 336 páginas |
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Página 12
... common hæmatite , or red oxide of iron — G = 4.5 − 5.5 ; H = 5.5-6.5 - means that its specific weight is from four and a half to five and a half times greater than that of water , and that in hardness it stands between five and a half ...
... common hæmatite , or red oxide of iron — G = 4.5 − 5.5 ; H = 5.5-6.5 - means that its specific weight is from four and a half to five and a half times greater than that of water , and that in hardness it stands between five and a half ...
Página 18
... common coal , jet , lignite , peat .- ( Coal in its numerous varieties . ) HYDROCARBONS— ( simple ) — naphtha , petroleum , maltha , elaterite , asphalt , albertite , ozocerite , hatchetine ; ( oxygenated ) succinite ( amber ) , ambrite ...
... common coal , jet , lignite , peat .- ( Coal in its numerous varieties . ) HYDROCARBONS— ( simple ) — naphtha , petroleum , maltha , elaterite , asphalt , albertite , ozocerite , hatchetine ; ( oxygenated ) succinite ( amber ) , ambrite ...
Página 21
... Common Salt ( chloride of sodium ) is found in incrustations in desiccated sea - beaches , and in the sites of dried - up lakes . It occurs abundantly in the solid crust as rock - salt , and is held in solution by all sea - water and ...
... Common Salt ( chloride of sodium ) is found in incrustations in desiccated sea - beaches , and in the sites of dried - up lakes . It occurs abundantly in the solid crust as rock - salt , and is held in solution by all sea - water and ...
Página 27
... common occurrence in the geography of the system . Though superficially unat- tractive , it is rich in mineral and metallic products - coals , lime- stones , fire - clays , building - stones , ironstones , and ores of lead , zinc ...
... common occurrence in the geography of the system . Though superficially unat- tractive , it is rich in mineral and metallic products - coals , lime- stones , fire - clays , building - stones , ironstones , and ores of lead , zinc ...
Página 33
... peat may lie upon clay , sand upon clay , common humus on sandy clay , and clay may rest upon shingly C debris ; while in many of our alluvial flats ( SOILS AND SUBSOILS . 33 Soils of Disintegration Soils of Transport.
... peat may lie upon clay , sand upon clay , common humus on sandy clay , and clay may rest upon shingly C debris ; while in many of our alluvial flats ( SOILS AND SUBSOILS . 33 Soils of Disintegration Soils of Transport.
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