Economic Geology: Or, Geology in Its Relations to the Arts and ManufacturesW. Blackwood and sons, 1874 - 336 páginas |
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Página 11
... compact , vitreous , & c . The columnar aspect of the basalt of the Giant's Causeway is its structure ; a chip from any of the columns exhibits its internal crystalline texture . The outward portion of a rock , exposed to and acted upon ...
... compact , vitreous , & c . The columnar aspect of the basalt of the Giant's Causeway is its structure ; a chip from any of the columns exhibits its internal crystalline texture . The outward portion of a rock , exposed to and acted upon ...
Página 12
... Compact , 1.870 ,, 2.288 Amianthus , 0.315 to 1.000 " Crystallised , 2.311 ,, 2.900 Arragonite , 2.900 Asphalt , .905 to 1.220 Heliotrope , Honeystone , Mellite , 2.629 ,, 3.000 · 1.650 Azure - stone , • 2.850 Hornblende , 3.250 to ...
... Compact , 1.870 ,, 2.288 Amianthus , 0.315 to 1.000 " Crystallised , 2.311 ,, 2.900 Arragonite , 2.900 Asphalt , .905 to 1.220 Heliotrope , Honeystone , Mellite , 2.629 ,, 3.000 · 1.650 Azure - stone , • 2.850 Hornblende , 3.250 to ...
Página 17
... ( compact hydrous ) opal , with it FELSPAR GROUP - Anorthite , Labradorite , hyalophane albite , oli goclase , orthoclase . — Amorphous felstones , pitchstones , and obsid ians . ) CLAY GROUP - Kaolin , halloysite , smectite , bole ...
... ( compact hydrous ) opal , with it FELSPAR GROUP - Anorthite , Labradorite , hyalophane albite , oli goclase , orthoclase . — Amorphous felstones , pitchstones , and obsid ians . ) CLAY GROUP - Kaolin , halloysite , smectite , bole ...
Página 19
... compact and homogeneous texture . Slate is often applied indiscriminately to all hard , laminated , argillaceous rocks , that can be readily split up ; hence slaty sandstone , mica - slate , clay- slate , & c . It would be better ...
... compact and homogeneous texture . Slate is often applied indiscriminately to all hard , laminated , argillaceous rocks , that can be readily split up ; hence slaty sandstone , mica - slate , clay- slate , & c . It would be better ...
Página 20
... compact silicious rocks and minerals of various colours , exhibiting smooth or con- choidal fractures . Flint is nodules of impure silica of various colours , and usually found in chalk and limestone strata . Chert is the name given to ...
... compact silicious rocks and minerals of various colours , exhibiting smooth or con- choidal fractures . Flint is nodules of impure silica of various colours , and usually found in chalk and limestone strata . Chert is the name given to ...
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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
abundant admixture agricultural alumina amount antimony arsenic artificial arts and manufactures basalts beds bismuth bituminous blocks borax Britain calcareous carbonate carbonic acid Carboniferous cements chalk chemical chiefly chloride clay coal colour compact composition consists containing copper crust crystalline crystals deposits Derbyshire districts durable earth employed engineer extensively felspar fire-clay formations gems geologist Geology gold granites greenstones grits gypsum hard heat hence hydraulic 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 preparation purposes pyrites quarries quartz require rocks saline salts sand sandstones schists serpentines shales silica Silurian silver soda sodium soft soils specific gravity springs stones strata stratified structure substances sulphate sulphide sulphuric acid surface tertiary texture thickness tints tion tons usually varieties various vary veins volcanic yellow yield zinc