By Henry R. Frankel
Answer of the sixty-year debate over continental glide, culminating within the triumph of plate tectonics, replaced the very cloth of Earth technology. This four-volume treatise at the continental float controversy is the 1st whole heritage of the foundation, debate and sluggish popularity of this innovative concept. according to wide interviews, archival papers and unique works, Frankel weaves jointly the lives and paintings of the scientists concerned, generating an available narrative for scientists and non-scientists alike.
Vol.1: Wegener and the Early Deba
Vol.2: Paleomagnetism and affirmation of Drift
Vol.3: creation of Seafloor Spreading
Vol.4: Evolution into Plate Tectonics
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Additional info for The Continental Drift Controversy. Introduction of Seafloor Spreading
The predominant term is, of course, of degree n = 1, expressing the fact that the continents are concentrated in a single hemisphere. The terms n = 2 and those greater than n = 5 are relatively weak, the terms n = 3, 4 and 5 being strong. Terms of odd degree have opposite signs at antipodal points; therefore Prey’s analysis simply gives mathematical expression to the fact, which seemed of significance to an older generation of geologists, that the continents are antipodal to oceans . . This geophysical fact that only 3 per cent of the area of continent is antipodal to continent demands explanation.
Chadwick, Chamalaun, and Roberts were applied mathematicians. However, although Opdyke already had retrained as a paleomagnetist, he was and remains a geologist, and his work in paleoclimatology was as a geologist using paleomagnetic data not, as MacDonald said, a geophysicist turning to geology. MacDonald, however, was right about the source of the new support for mobilism, originated as it was by paleomagnetists and by oceanographers who had by then begun to make contributions. But, if he also was implying that no key workers in either field were geologists or had been trained in the subject, he was wrong.
Prey took values of the height of the land above and the depths of the ocean below sea-level, counting the latter negative, and expressed them as a Comp. : 1 Date:17/2/12 Time:18:02:26 Page Number: 22 22 Title Name: Frankel Extension and reception of support for mobilism: 1960–1966 series of spherical harmonics. The predominant term is, of course, of degree n = 1, expressing the fact that the continents are concentrated in a single hemisphere. The terms n = 2 and those greater than n = 5 are relatively weak, the terms n = 3, 4 and 5 being strong.