the Mid-Atlantic Ridge (Original)

Figure 3. The antipodal arrangement of land and sea. (Reprinted with permission from Gregory [7]. Copyright by the Royal Geographical Society.)

    Another significant fact is that the triple points formed where 'plate boundaries' (i.e. seismic belts) meet coincide very closely with the vertices of an icosahedron, which, like the tetrahedron, is one of the five regular polyhedra or Platonic solids. This, too, would be a remarkable coincidence if 'plates' had really changed their shape and size to the extent postulated in plate tectonics.