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"Chapman pushed amongst them, followed by me. We made our way to a pleasant house, built of the quarried volcanic rock, alternating with the white stone of the quarry, and covered with an almost flat roof of the blue metal. In this house we were received by the Superintendent of Quarries, a supernatural, who still retained a mechanical aptitude, brought with him from the earth.
Somma which is before us, for instance, affords a wonderful example of a mountain formed of marine deposits, and which has been raised by subterraneous fire, and those large and singular veins which you see at the base and rising through the substance of the strata are composed of volcanic porphyry, and offer a most striking and beautiful example of the generation and structure of rocks and mineral formations.
Contemporaneous lava flows interbedded with the strata show that volcanic action accompanied the downwarp, and that molten rock was driven upward through fissures in the crust and outspread over the sea floor in sheets of lava.
This, no doubt, applies in the majority of cases, but the volcanic forces do not confine themselves to these magnificent displays of energy, nor are their products limited to those above specified.
Although the foregoing relatively simple explanation of volcanic action can not be said as yet to be generally accepted by geologists, the reasons are sufficient which lead us to believe that it accounts for the main features which we observe in this class of explosions in other words, it is a good working hypothesis.
So far as the volcanic neighbor was concerned, the forty-four thousand inhabitants of Arequipa had no reason to anticipate the catastrophe which presently befell them. At five minutes past five an earthquake shock was experienced, which, though severe, seems to have worked little mischief.
Three days' camel-riding up one of the short valleys which lead towards the high table-land offered little of interest beyond arid, igneous rocks, and burnt-up, sand-covered valleys, with distorted strata on either side. Here and there, where warm volcanic streams rise out of the ground, the wilderness is converted into a luxuriant garden, in which palms, tobacco, and other green things grow.
After leaving Madonna di San Biagio, the road strikes at once into an open country, expanding on the right towards the woody ridge of Monte Fallonica, on the left toward Cetona and Radicofani, with Monte Amiata full in front its double crest and long volcanic slope recalling Etna; the belt of embrowned forest on its flank, made luminous by sunlight.
There's nothing means anything to you but your work " "And my wife, and my kiddie, and my home." The man's deep voice broke in sharply upon the light, strident tones of the angry girl. He spoke while he stirred the contents of the saucepan he had placed on the stove. But the interruption only seemed to add fuel to the girl's volcanic flood of bitter feeling.
The face of the mountain is precipitous, and is of a porous tufa full of holes. As many as sixty of these artificial caves remain; but there were at one time many more, that have been destroyed by the fall of the very friable volcanic rock.
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