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Plate Tectonics
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You might think that, by now, people would have become accustomed to the idea of natural catastrophes. We live on a planet that is still cooling and which has fissures and faults in its crust; this much is accepted even by those who think that the globe is only six thousand years old, as well as by those who believe that the earth was "designed" to be this way. Even in such a case, it is to be expected that earthquakes will occur and that, if they occur under the seabed, tidal waves will occur a
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Volcanologists have a tendency to drift westward in the United States because that's where the action is tectonically. North and Central America occupy the western portion of a big slab of the earth's crust known as the North American plate, which is shaped roughly like an inverted triangle. The bottom of the triangle is in the middle of the Atlantic Ocean halfway between South America and Africa. The top two corners are north of Siberia and northwest of Greenland. This piece of the earth's crus
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