Rocks Classified and Described: A Treatise on LithologyLongmans, Green, and Company, 1866 - 425 páginas |
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Página 2
... COAL , some SULPHURETS , and some IRON Ores . The number of the accessory ingredients is very much greater , and indeed almost unlimited ; that is to say , under certain circumstances almost every known mineral may occur as an accessory ...
... COAL , some SULPHURETS , and some IRON Ores . The number of the accessory ingredients is very much greater , and indeed almost unlimited ; that is to say , under certain circumstances almost every known mineral may occur as an accessory ...
Página 50
... coal districts , and in alum - shales ( Bonn , Dresden ) ; sometimes is found as an efflorescence in numerous places in the United States . 72. Native Alum . - Chemically speaking there are several subspecies . Crystallographically all ...
... coal districts , and in alum - shales ( Bonn , Dresden ) ; sometimes is found as an efflorescence in numerous places in the United States . 72. Native Alum . - Chemically speaking there are several subspecies . Crystallographically all ...
Página 68
... coal . Cubic form very 109. Fluor ( Fluor - spar ) .- Monometric . frequent . Crystals single or in groups , attached , also massive , in coarse granular and radiated aggregates , or amorphous and earthy . Cleavage octahedral , perfect ...
... coal . Cubic form very 109. Fluor ( Fluor - spar ) .- Monometric . frequent . Crystals single or in groups , attached , also massive , in coarse granular and radiated aggregates , or amorphous and earthy . Cleavage octahedral , perfect ...
Página 70
... Coal for- mation , and elsewhere . Very frequently in veins of ore ( in the gneiss of Freiberg , in the Devonian strata of the Harz , in mountain limestone of Derbyshire and Cumberland , in granite of Linares ) ; also in nests and ...
... Coal for- mation , and elsewhere . Very frequently in veins of ore ( in the gneiss of Freiberg , in the Devonian strata of the Harz , in mountain limestone of Derbyshire and Cumberland , in granite of Linares ) ; also in nests and ...
Página 72
... coal . It is no less frequent in metalliferous veins . Pyrites is sometimes formed by the action of a solution of copperas on organic substances , and this will account for its often being found in the form of fossils . Wöhler has ...
... coal . It is no less frequent in metalliferous veins . Pyrites is sometimes formed by the action of a solution of copperas on organic substances , and this will account for its often being found in the form of fossils . Wöhler has ...
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Términos y frases comunes
accessory ingredient aggregates Alps amygdaloidal aphanite argillaceous augite basalt beds bitumen brown Browncoal CALCAIRE 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 earthy Edition felsitic felspar fibrous fine-grained foliated formation fossils Fracture conchoidal frequently fuses garnet geodes geol geological Germ gneiss grains granite granular granulite grav 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 sandstone Saxony schists sedimentary rocks serpentine shale silica slaty soluble sometimes strata sulphuric surface syenite texture trachyte transition translucent transmutation Transparent usually varieties veins vesicular cavities volcanic Woodcuts
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