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Updated: May 31, 2025
Westward of this main range, the metamorphic schists are foliated, though less plainly, in the same direction, which is likewise common to the zone of old erupted trappean rocks, forming the outermost islets.
Although difficult to know well, he had the general reputation of being easy to get along with. But a few times he had erupted into action as might a spring uncoiling from tight pressure, and that action was usually preceded by just such quiet statements as the one he had just made to Boyd. Boyd, however, was never one to be defeated in a first skirmish of wills. "Why not?" he demanded now.
This, according to Von Buch, holds good in a remarkable manner both at the Lipari Islands and on the Peak of Teneriffe; at this latter place obsidian has never flowed from a less height than 9,200 feet. Obsidian, also, appears to have been erupted from the loftiest peaks of the Peruvian Cordillera.
He can't even guess who may be the ruler of China from one day to another. Yesterday it was an old woman, today a dictator, tomorrow the mob; who can foretell what shape the lava erupted from a volcano will take? Bet you a new hat, Mr. Forbes, that the minute the embassy heard of Mrs. Lester's murder they put two and two together and kept a sharp eye on these mansions and on your house.
None of these rocks contain large crystals of feldspar, or have the harsh fracture peculiar to trachyte. These feldspathic lavas and tuffs are the uppermost or those last erupted; innumerable dikes, however, and great masses of molten rock, have subsequently been injected into them.
Something had happened there a few thousand centuries before, and in a moment of evident spleen and vexation the earth had vomited up that pile of rock debris, and Jolly Roger good humoredly told himself and Peter that it was an act of Providence especially intended for them, though planned and erupted some years before they were born.
The invasion of a region by volcanic forces is attended by movements of the crust heralded by earthquakes. A fissure or a pipe is opened and the building of the cone or the spreading of wide lava sheets is begun. VOLCANIC CONES. The shape of a volcanic cone depends chiefly on the materials erupted.
Then from overhead came a savage rush and shriek, a flash of light that showed vivid even amidst the confusion of light, a harder, more vicious crash than all the other crashing reports, and the shrapnel ripped down along the line of the German trench that erupted struggling, hurrying knots of men.
Then I could make out the thuds and squeals of bullets that hit wood and iron in the wheels and under-construction of the wagon. Whoever it was that was shooting, the aim was too low. When I started to rise, my mother, evidently just in the act of dressing, pressed me down with her hand. Father, already up and about, at this stage erupted into the wagon. "Out of it!" he shouted. "Quick!
We are thus reminded of the relative position in most recent volcanic districts of the trachytic and basaltic lavas, the latter from their greater weight having sunk to a lower level in the earth's crust, and having consequently been erupted at a later period over the lighter and upper lavas of the trachytic series.
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