In 'About This Site' I have outlined that one of the premises of this website is the removal of the concept of 'Accretion' as the main planet forming process ( and its re-interpretation of the origin of the above rock shields and their subsequent continent pattern ).

It is generally understood that the Earth, and all celestial bodies, formed by accretion ( an increase in the mass of a celestial object by the collection of surrounding interstellar gases by gravity ), and have always retained their present diameters.

However, If the need for retaining a constant diameter is taken out of the equation, a free form re-assembly of these original shields can be done which allows them to determine their own diameter. This must still, of course, be done with reference to the positioning and types of fault lines and the 'surface magnetic field' ( the shields' magnetic striping )

Note: see Astro-physics sub-section ( apss ) for 'Accretion'.