KARSTEN SCHNEIDER / SCIENCE PHOTO LIBRARY KARSTEN SCHNEIDER / SCIENCE PHOTO LIBRARY
Global tectonics, north-western Atlantic. Satellite-based model of a close-up of an Earth globe showing the Atlantic part of the Eurasian and African plates, two of the seven primary tectonic plates that make up the Earth's crust. Phenomena observed at the plate boundaries (yellow) include earthquakes, volcanic activity, mountain-building, and oceanic trench formation. The movement of the tectonic plates over the millions of years of geologic time drives the creation, destruction and drifting of the continents. The movement of the tectonic plates is thought to be driven by convection currents in the underlying mantle.
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