The papers

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The papers themselves had straightforward scientific titles, some of which-perhaps only in the afterlight of their great effect -seem to resound with the magnitude of the subject: “History of Ocean Basins,” “Rises, Trenches, Great Faults, and Crustal Blocks,” “Sea-Floor Spreading and Continental Drift,” “Seismology and the New Global Tectonics.” From Berkeley, Princeton, San Diego, New York, Canberra, Cambridge (England), there were about twenty primal contributions which, taken together, can be said to have constituted the plate-tectonics revolution. Now¬†flexplek huren almere plate tectonics is widely taken for granted. When I was in high school, there was essentially no television in America, and four years later television had replaced flypaper. When I was in high school, in the nineteen-forties, the term “plate tectonics” did not exist-albeit there was one remarkably prescient paragraph in our physical-geology textbook about the motions and mechanisms of continental drift. Today, children in schoolrooms just assume that the story being taught them is as old as the hills, and was told by God himself to their teacher in 4004 B.C. The story is that everything is moving, that the outlines of continents by and large have nothing to do with these motions, that “continental drift” is actually a misnomer, that only the world picture according to Marco Polo makes much sense in the old-time browns and greens and Rand McNally blues. The earth is at present divided into some twenty crustal segments called plates. Plate flexplek huren amsterdam boundaries miscellaneously run through continents, around continents, along the edges of continents, and down the middle of oceans. The plates are thin and rigid, like pieces of eggshell. In miles, sixty deep by nine thousand by eight thousand are the dimensions of the Pacific Plate. “Pacific Plate” is not synonymous with “Pacific Ocean,” which wholly or partly covers many other plates. There are virtually no landmasses associated with some plates-the Cocos Plate, the Nazca Plate. Some plates are almost entirely land-the Arabian Plate, the Iranian Plate, the Eurasian Plate, a large part of which used to be known as the (heaven help us) China Plate. (Jokes may be invisible to some geologists. Harry Hess, who in ig6o opened out the new story with his “History of Ocean Basins,” began it with these words:

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