Rocks Classified and Described: A Treatise on LithologyLongmans, Green, and Company, 1866 - 425 páginas |
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Página 134
... history , much in the same way as at the present time , and has always brought forth like products . What has become of those older products corresponding to the lavas and basalts of the present age ? Doubtless a great part may have ...
... history , much in the same way as at the present time , and has always brought forth like products . What has become of those older products corresponding to the lavas and basalts of the present age ? Doubtless a great part may have ...
Página 163
... historical account of the mode in which it has been used by different authors . We think the divergence of their readings will be a sufficient justification , if any be needed , for the way in which we propose that the term should in ...
... historical account of the mode in which it has been used by different authors . We think the divergence of their readings will be a sufficient justification , if any be needed , for the way in which we propose that the term should in ...
Página 374
... not be out of place here . If the views now prevalent respecting the earth's history are correct , the igneous rocks must be regarded as the most original , or rather the only original formations . 374 PROCESSES OF ROCK FORMATION :
... not be out of place here . If the views now prevalent respecting the earth's history are correct , the igneous rocks must be regarded as the most original , or rather the only original formations . 374 PROCESSES OF ROCK FORMATION :
Página 384
... history than elsewhere is usual . Eocene deposits contain firm clay - slate , which is used for roofing purposes ; the Miocene browncoals of the Mo- lasse formation appear already to have almost become ordinary black coal , & c . On the ...
... history than elsewhere is usual . Eocene deposits contain firm clay - slate , which is used for roofing purposes ; the Miocene browncoals of the Mo- lasse formation appear already to have almost become ordinary black coal , & c . On the ...
Página 387
... history . They are the oldest rocks of which we have knowledge , since we find them overlaid by all the sedimentary rocks , and broken through by every kind of igneous rock . But the question arises , upon what foun- dation can these ...
... history . They are the oldest rocks of which we have knowledge , since we find them overlaid by all the sedimentary rocks , and broken through by every kind of igneous rock . But the question arises , upon what foun- dation can these ...
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Términos y frases comunes
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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