More data

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More data, and increased sophistication in the analysis of data, began to show that polar-wander curves-once thought to be in agreement worldwide -could differ some from continent to continent. Curves based on Paleozoic and Triassic rock in North America and in Europe looked much alike but, oddly, stood separate in the way that a single line will appear to be double in inebriate vision. The gap corresponds to the present width of the Atlantic Ocean. The flexplek huren breda opening of the Atlantic began in the Triassic. If the hypothesis of continental drift had long been overshadowed by the hypothesis of polar wander, the reverse would before long be true. Researchers in paleomagnetism at Cambridge University concluded that their data were showing them that both hypotheses could be correct, as later research at Princeton would confirm. The poles indeed had wandered. The continents had moved as well. The phenomenon of “apparent polar wander” had been caused, right enough, by the movement of masses of land, but concomitantly the earth had rolled-and patterns of “true polar wander” were seen to be superimposed on all the other motions of the shifting surface of the world. But what motions? If the continents had drifted, then in what manner were they drifting? Where had they come from and where were they going? What would happen if two should collide? Since they obviously were not plowing through solid basalt, how in fact did they move? It was all within a decade-1960-1968-that these questions were given answers of startling cohesion, as not only paleomagnetists but seismologists and oceanographers, geologists and geophysicists, whose specialties had been diverging through time, suddenly drew together around new flexplek huren almere outpourings of information and produced a chain of scientific papers whose interlocking insights would for most geologists fundamentally adjust their understanding of the dynamics of the earth. “It was a change as profound as when we gave up the Biblical story,” Deffeyes said as he tapped his collector into the ground. “It was a change as profound as Darwinian evolution, or Newtonian or Einsteinian physics.”

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