Rocks Classified and Described: A Treatise on LithologyLongmans, Green, and Company, 1866 - 425 páginas |
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Página 1
... mineral aggregates , consisting of minute mineral parts more or less solid and more or less intimately and firmly united , knit , or cemented together . By this definition it will be seen that we exclude the animal and vegetable ...
... mineral aggregates , consisting of minute mineral parts more or less solid and more or less intimately and firmly united , knit , or cemented together . By this definition it will be seen that we exclude the animal and vegetable ...
Página 2
... mineral may occur as an accessory in any rock , and the essential ingredients of one rock frequently occur as accessories in another rock . But although we may say with truth that the number of the accessory minerals is without limit ...
... mineral may occur as an accessory in any rock , and the essential ingredients of one rock frequently occur as accessories in another rock . But although we may say with truth that the number of the accessory minerals is without limit ...
Página 3
... mineral very frequently denotes the neighbourhood of another , and , vice versa , that the presence of some minerals forbids the simultaneous pre- sence of certain others . 6 In 1849 Breithaupt first treated this subject , and pub ...
... mineral very frequently denotes the neighbourhood of another , and , vice versa , that the presence of some minerals forbids the simultaneous pre- sence of certain others . 6 In 1849 Breithaupt first treated this subject , and pub ...
Página 14
... mineral deposits , but principally are found filling cavities and nests in various rocks , in which latter case they are to be regarded as products of exfiltration from those rocks . Chemically they are all hydrous aluminous silicates ...
... mineral deposits , but principally are found filling cavities and nests in various rocks , in which latter case they are to be regarded as products of exfiltration from those rocks . Chemically they are all hydrous aluminous silicates ...
Página 17
... mineral . Lustre vitreous , on cleavage surfaces mother - of- pearl ; the fibrous varieties silky . All degrees of trans- parency to the opaque . Cp . variable . We may give as a normal formula , R3Si2 + RSi , in which R = Mg , Ca , and ...
... mineral . Lustre vitreous , on cleavage surfaces mother - of- pearl ; the fibrous varieties silky . All degrees of trans- parency to the opaque . Cp . variable . We may give as a normal formula , R3Si2 + RSi , in which R = Mg , Ca , and ...
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
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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