The large scale structure of the earth is caused by geodynamic processes which are explained using energetic, kinematic and dynamic descriptions. While "geodynamic processes" are understood to include a large variety of processes and the term is used quite loosely, the methods of their description involve well defined fields. Energetic descriptions are involved with distribu tion of energy in our planet, typically expressed in terms of heat and tempera ture. Kinematic descriptions describe movements using velocities, strains and strain rates. Dynamic descriptions indicate how stresses and...