Volcanoes: What They are and what They TeachC. K. Paul, 1881 - 381 Seiten |
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Seite xi
... containing liquids , in the crystals of rocks . ( After Zirkel ) . • 43 • to face p . 60 62 8. Minute liquid - cavity in a crystal , with a moving bubble . ( After Hartley ) · • 9. Cavity in crystal , containing carbonic - acid gas at a ...
... containing liquids , in the crystals of rocks . ( After Zirkel ) . • 43 • to face p . 60 62 8. Minute liquid - cavity in a crystal , with a moving bubble . ( After Hartley ) · • 9. Cavity in crystal , containing carbonic - acid gas at a ...
Seite 21
... containing water entangled in its mass . As this water passes into the state of steam it tends to escape , and in so doing puts the whole mass into violent movement . When the steam rises to the surface , bubbles are formed , and the ...
... containing water entangled in its mass . As this water passes into the state of steam it tends to escape , and in so doing puts the whole mass into violent movement . When the steam rises to the surface , bubbles are formed , and the ...
Seite 45
... contain fossils , and Professor Guiscardi , of Naples , has been able to collect several hundred species of shells , transported thus by volcanic action from the rock - masses which form the foundation of the volcano of Vesuvius . The ...
... contain fossils , and Professor Guiscardi , of Naples , has been able to collect several hundred species of shells , transported thus by volcanic action from the rock - masses which form the foundation of the volcano of Vesuvius . The ...
Seite 48
... contain from 66 to 80 per cent . of silica ; they are poor in lime , magnesia , and oxide of iron , but rich in potash and soda . The basic lavas contain from 45 to 55 per cent . of silica ; they are rich in magnesia , lime , and oxide ...
... contain from 66 to 80 per cent . of silica ; they are poor in lime , magnesia , and oxide of iron , but rich in potash and soda . The basic lavas contain from 45 to 55 per cent . of silica ; they are rich in magnesia , lime , and oxide ...
Seite 49
... contain a larger proportion of oxide of iron and other heavy oxides than the acid- lavas , the former have usually a higher specific gravity than the latter ; it is , indeed , possible in most cases to distinguish between these ...
... contain a larger proportion of oxide of iron and other heavy oxides than the acid- lavas , the former have usually a higher specific gravity than the latter ; it is , indeed , possible in most cases to distinguish between these ...
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Häufige Begriffe und Wortgruppen
active volcanoes andesites appear atmosphere augite Auvergne basaltic basic lavas canic carbonic acid cavities centre character Cheaper Edition chemical Cloth composed composition condition crater crater-rings crystalline crystals Demy 8vo denuding forces depth dykes earth's crust earth's surface enormous eruption Etna exhibit exist fact Fcap feet formation formed fragments Frontispiece gases geological periods geologists glassy globe granitic igneous Illustrations incandescent interior Island lapilli Large post 8vo lava-currents lava-streams line of fissure Lipari liquid mass melaphyres metallic meteorites microliths miles minerals Monte Nuovo ocean origin parasitic cones Poems portions present pressure price 35 produced pumice quantities rhyolites rock-masses scoria-cones scoriæ Second Edition seen sides silica slope Small crown 8vo solid steam Stromboli structure substances subterranean summit take place temperature Third Edition tion trachytic tuffs vapour vast Vesuvius volcanic action volcanic cones volcanic districts volcanic forces volcanic mountains volcanic outbursts volcanic phenomena volcanic vents vols
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