Relating to the forces and movements of matter within the Earth, especially those that cause geological changes like earthquakes and mountain formation.
From geo- (Greek 'earth') + dynamic (from Greek 'dynamis' meaning 'power' or 'force'). Coined in the 19th century as geologists sought to explain how Earth's interior generates the energy for surface changes.
Geodynamic processes are happening right now beneath your feet—the same forces that built the Rocky Mountains billions of years ago are still slowly rearranging Earth's continents at about the speed your fingernails grow.
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