On the Origin of Continents and Ocean Floors

From the concept of permanence the fundamental question arises as to how the distribution of continental and oceanic sectors came into being. Three groups of theories are discussed: (1) theories starting with a primary surface layer of basaltic composition; (2) theories starting with the resonance theory of the moon's origin and considering the result of such a hypothetical happening on a sialic surface layer of continental thickness; and (3) theories considering the influence of convection currents on a surface layer of sialic composition.