The book ... Volcanoes And Earthquakes was written by author Edwin J Edwin James Houston Here you can read free online of ... Volcanoes And Earthquakes book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is ... Volcanoes And Earthquakes a good or bad book?
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An excellent opportxmity for seeing them is afiforded in the walls of the Val del Bove. Sir Charles Lyell, the English geologist, who has care* fully studied Mt. Etna, asserts that this mountain began to be formed during a geological period known as the Tertiary Age, through a crater that opened on the floor of the Mediterranean Sea. The material thus thrown out collected around the crater and produced a mountainous pile that gradually emerged above the level of the sea, and on fresh materials ...continuing to be thrown out, at length reached its present height. It would appear that at some former time in its history, there were two vents near the top of the mountain, the second crater being formed immediately under the Val del Bove. Soon, how- ever, the second and lower crater was closed, the upper one alone remaining active. The moimtain, therefore, continued to be slowly raised in the air by the materials brought out through this opening. Then came the great explosive eruption during which the side of the mountain was blown off to form the great chasm of the Val del Bove.
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