Sima

Definition and stakes

Portrait of Alfred Wegener Alfred Wegener,  The Origin of Continents and Oceans (1924)

“ Geologically speaking, sealing-wax is thus of such mobility at ordinary temperatures that we cannot use it at all for the explanation of geological phenomena. If the sima has a viscosity coefficient 10,000 times as large as that of sealing-wax, then a month for the sealing-wax is equivalent to a thousand years for the sima. And this is a period of time which corresponds more with geological changes. We need not therefore draw the conclusion from Schweydar’s figures that the earth, because it has the same viscosity as steel, behaves as if it were a rigid body. ”
Source: Wikisource

Portrait of Alfred Wegener Alfred Wegener,  The Origin of Continents and Oceans (1924)

“ Further, on account of this greater mobility of the sima, the continental margins experience only a slight resistance to displacement, and therefore become neither folded nor squeezed, so that neither marginal mountain chains nor volcanoes occur. Earthquakes are also not to be expected here, since the sima, by its power to flow, is mobile enough to render all necessary movements possible, without discontinuity. ”
Source: Wikisource

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