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Figure 2: The movement of tectonic plates across the Earth's surface. cross section of a tectonic plate Cross-sectional diagram showing three tectonic plates at ocean ridges, transform faults, and a subduction zone. The image illustrates rising magma forming rift and subduction volcanoes, convection currents in the mantle, and features such as ocean trenches, extinct and hot-spot volcanoes, and the movement of plates above a molten core and low-velocity mantle layer. World map showing the principal tectonic plates that make up Earth's lithosphere, with plate boundaries outlined in red and major plates labeled, including the Pacific, North American, South American, African, Eurasian, Indo-Australian, Antarctic, Nazca, Cocos, and Caribbean plates. Triangles mark notable geological features such as volcanoes along plate boundaries. The Earth's crust is a jigsaw puzzle of huge rigid plates in constant relative motion. The plates are bounded by three types of features: ridge axes, where new seafloor is created in mid-ocean; transform faults, where plates slide past one another; and subduction zones, where plates overlap, with one plate sliding under the other.
Explore Ethiopia's untapped geothermal and hydropower resources
Study how the convection currents and other forces play a role in the movement of Earth's tectonic plates
How and where does magma form on Earth?
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Videos

Explore Ethiopia's untapped geothermal and hydropower resources
Learn about Ethiopia's untapped resources of geothermal and hydroelectric power,...
Video: Contunico © ZDF Studios GmbH, Mainz
Study how the convection currents and other forces play a role in the movement of Earth's tectonic plates
The roles that convection currents and other forces play in the movement of Earth's...
Video: © MinuteEarth (A Britannica Publishing Partner)
How and where does magma form on Earth?
At the margins of Earth's plates, where two plates pull apart or one plate dives...
Video: Encyclopædia Britannica, Inc.

Images

Figure 2: The movement of tectonic plates across the Earth's surface.
Encyclopædia Britannica, Inc.
cross section of a tectonic plate
A tectonic plate in cross section featuring subduction zones, oceanic and continental...
© Merriam-Webster Inc.
volcanism and plate tectonics
Stratovolcanoes tend to form at subduction zones, or convergent plate margins, where...
Encyclopædia Britannica, Inc.
Figure 4: Principal plates that make up the Earth's lithosphere. Very small plates...
Encyclopædia Britannica, Inc.
The Earth's crust is a jigsaw puzzle of huge rigid plates in constant relative motion....
Encyclopædia Britannica, Inc.