Symmetry of the Earth's planetary relief

The order in structure of planetary relief is characterized by the following symmetrical attitudes of forms: antisymmetry of the north and south hemisphere (polar antisymmetry), underlined by availability of antianalogical forms; symmetry of cone in the Laurasian continental massif in the north hemisphere; symmetry of axis of the 4th order in the south hemisphere. In the West Pacific region the summation of private dissymetries of planetary relief structure occurs. The Earth's equatorial belt has a system of sinistral oroclines. Symmetrical peculiarities of planetary relief structure may allow us to suppose that the main process of the Earth's development during the Post-Gondwanian epoc (middle-Jurassic-Cenozoic period) was anisotropic expansion, mainly in the south hemisphere. Other tectonic processes, including lithospheric plate displacements, occur simultaneously with the normal process of the Earth's expansion.