Wiktionary
n. the branch of geophysics that studies the deformation processes of planetary mantle and crust, and the resulting earthquakes and volcanism
Wikipedia
Geodynamics is a subfield of geophysics dealing with dynamics of the Earth. It applies physics, chemistry and mathematics to the understanding of how mantle convection leads to plate tectonics and geologic phenomena such as seafloor spreading, mountain building, volcanoes, earthquakes, faulting and so on. It also attempts to probe the internal activity by measuring magnetic fields, gravity, and seismic waves, as well as the mineralogy of rocks and their isotopic composition. Methods of geodynamics are also applied to exploration of other planets.
Usage examples of "geodynamics".
For that matter, legend had it that only a handful of men had ever really comprehended the geodynamics of superspace - and they were now centuries dead.