Rocks Classified and Described: A Treatise on LithologyLongmans, Green, and Company, 1866 - 425 páginas |
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Página v
... probably be found , I am alone responsible . Never- theless , I hope that this work may in some measure supply a want which has been long felt in our geological literature . I trust that allowance will be made for the difficulties of a ...
... probably be found , I am alone responsible . Never- theless , I hope that this work may in some measure supply a want which has been long felt in our geological literature . I trust that allowance will be made for the difficulties of a ...
Página vii
... be introduced ; for Science marches with uninterrupted steps towards new fields of discovery , and every year alters its aspect . In a system of Lithology , however , most of the names which are in use will probably remain , and one.
... be introduced ; for Science marches with uninterrupted steps towards new fields of discovery , and every year alters its aspect . In a system of Lithology , however , most of the names which are in use will probably remain , and one.
Página viii
... probably remain , and one chief object of this book is to define these so as to render intelligible the ideas which each name should convey ; and both Author and Translator are actuated by the desire and ambition of arriving , as far as ...
... probably remain , and one chief object of this book is to define these so as to render intelligible the ideas which each name should convey ; and both Author and Translator are actuated by the desire and ambition of arriving , as far as ...
Página 11
... e.g. dolerite , basalt , gabbro ( Isle of Skye ) , hypersthenite , and many lavas of Etna . Saussurite ( jade ) is probably only an impure labradorite , bearing somewhat the same relation to it as felstone to FELSPAR . 11.
... e.g. dolerite , basalt , gabbro ( Isle of Skye ) , hypersthenite , and many lavas of Etna . Saussurite ( jade ) is probably only an impure labradorite , bearing somewhat the same relation to it as felstone to FELSPAR . 11.
Página 14
... probably lapis lazuli . 10. Sodalite . - Monometric in dodecahedrons ; cleavage , accordingly , also massive . Fracture conchoidal to uneven . H. = 5.5-6 . S.G. = 2.26 . Colour yellowish , greenish- white , greenish - grey , and blue ...
... probably lapis lazuli . 10. Sodalite . - Monometric in dodecahedrons ; cleavage , accordingly , also massive . Fracture conchoidal to uneven . H. = 5.5-6 . S.G. = 2.26 . Colour yellowish , greenish- white , greenish - grey , and blue ...
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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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