Rocks Classified and Described: A Treatise on LithologyLongmans, Green, and Company, 1866 - 425 páginas |
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Página 9
... varieties which contain soda colour the flame yellow . In microcosmic salt it is only soluble with difficulty , leaving behind a skeleton of silica . With cobalt solution the fused edges are coloured blue . Not susceptible to the action ...
... varieties which contain soda colour the flame yellow . In microcosmic salt it is only soluble with difficulty , leaving behind a skeleton of silica . With cobalt solution the fused edges are coloured blue . Not susceptible to the action ...
Página 17
... varieties richest in iron are partially decomposed by muriatic acid ; other varieties are little affected by that acid . ( a ) Tremolite ( Grammatite , Calamite ) . — Of light colour , semi - translucent . Iron not an essential ...
... varieties richest in iron are partially decomposed by muriatic acid ; other varieties are little affected by that acid . ( a ) Tremolite ( Grammatite , Calamite ) . — Of light colour , semi - translucent . Iron not an essential ...
Página 18
... varieties of tremolite and actinolite . In the variety known as Mountain leather the fibres are closely interlaced ... varieties manganese . Imperfectly decom- posed by acids . The following mineralogical varieties are distinguished ...
... varieties of tremolite and actinolite . In the variety known as Mountain leather the fibres are closely interlaced ... varieties manganese . Imperfectly decom- posed by acids . The following mineralogical varieties are distinguished ...
Página 38
... varieties containing much iron are fusible . All varieties are easily decomposed by sulphuric acid . The most beautiful crystals of chrysolite are said to come from granitic rocks of Upper Egypt . Fayalite , a variety very rich in iron ...
... varieties containing much iron are fusible . All varieties are easily decomposed by sulphuric acid . The most beautiful crystals of chrysolite are said to come from granitic rocks of Upper Egypt . Fayalite , a variety very rich in iron ...
Página 56
... varieties are fibrous , granular , compact . The cleavage of the crystals is rhombohedral , very perfect . The angle of the cleavage rhombohedron is the most charac- teristic distinguishing feature of the different species , which can ...
... varieties are fibrous , granular , compact . The cleavage of the crystals is rhombohedral , very perfect . The angle of the cleavage rhombohedron is the most charac- teristic distinguishing feature of the different species , which can ...
Outras edições - Ver tudo
Rocks Classified and Described: A Treatise on Lithology Bernhard von Cotta Visualização integral - 1878 |
Rocks Classified and Described: A Treatise on Lithology Bernhard von Cotta Visualização integral - 1866 |
Rocks Classified and Described: A Treatise on Lithology Bernhard von Cotta Visualização integral - 1865 |
Palavras e frases frequentes
aggregates Alps amygdaloidal aphanite appear argillaceous augite basalt beds bitumen brown Browncoal calcareous calcspar carbonate character chemical chlorite clay clay-slate Cleavage coal colour Colourless columnar compact composition compound conchoidal to uneven consists contains Crown 8vo crystalline schists crystals decomposed deposits diabase diorite dolerite dolomite earth Edition felsitic felspar fibrous fine-grained foliated formation fossils Fracture conchoidal frequently fuses garnet geodes geol geological Germ gneiss grains granite granular grav greenstones grey gypsum hornblende igneous rocks imbedded iron Jahrb labradorite lavas leucite lime limestone Lustre vitreous magnesia magnetic iron-ore marl mass massive matrass matrix melaphyre metamorphic mica mica-schist mineral muriatic acid occurs oligoclase opaque origin orthoclase oxide plutonic porphyritic pyrites pyroxene quartz quartz-porphyry resinous rock-salt sandstone Saxony schists sedimentary rocks serpentine shale silica slaty soluble sometimes strata sulphuric surface syenite texture trachyte transition translucent transmutation Transparent tufa usually varieties veins vesicular cavities volcanic Woodcuts
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