Plate divergence is a tectonic phenomenon in which lithospheric plates move apart along divergent plate boundaries, driven primarily by mantle convection, slab pull, and ridge push forces. This separation promotes decompression melting of the underlying asthenosphere, generating mafic magmas that ascend to form new oceanic crust at mid-ocean ridges or intraplate rift systems on continents. The process is characterized by extensional stress fields, normal faulting, and symmetric seafloor spreading, often accompanied by linear volcanic and seismic activity. Plate divergence plays a central role in lithosphere recycling, global heat loss, and the long-term evolution of ocean basins and continental configurations.
Great things can come from failure when it comes to geology. The Midcontinent rift formed about 1.1 billion years ago and runs smack in the middle of the United States at the Great Lakes. The rift failed to completely rupture, ...
Earth Sciences
Feb 4, 2026
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The King's Trough Complex is a several-hundred-kilometer-long, canyon-like system of trenches on the North Atlantic seafloor. Its formation was long thought to be the result of simple stretching of the oceanic crust. An international ...
Earth Sciences
Jan 29, 2026
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Carbon released from Earth's spreading tectonic plates, not volcanoes, may have triggered major transitions between ancient ice ages and warm climates, new research finds.
Earth Sciences
Jan 20, 2026
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The mid-ocean ridge runs through the oceans like a suture. Where Earth's plates move apart, new oceanic crust is continuously formed. This is often accompanied by magmatism and hydrothermal activity. Seawater seeps into the ...
Earth Sciences
Jan 6, 2026
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Magnetic data collected in the late 1960s has been brought back to life by a research team including a Keele scientist, who have used it to learn more about how the continent of Africa is stretching and splitting apart.
Earth Sciences
Nov 20, 2025
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The tectonic plates under Africa and Asia are slowly drifting apart, as the Gulf of Suez that separates these two land masses continues to widen at a rate of about 0.26–0.55 millimeters per year.
Tulane University researchers, collaborating with an international team of scientists, have discovered why some parts of Earth's crust remain strong while others give way, overturning long-held assumptions about how continents ...
Earth Sciences
Nov 5, 2025
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Madagascar's landscape tells a story of deep time: ancient rifting and geological tilting sculpted the island's dramatic topography and steered its rivers, setting the stage for the evolution of its extraordinary biodiversity.
Earth Sciences
Oct 23, 2025
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A new study published in the Proceedings of the National Academy of Sciences provides scientists with a powerful new tool for monitoring and predicting tectonic activity deep beneath the seafloor at mid-ocean ridges—vast ...
Earth Sciences
Oct 14, 2025
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Off the southern coast of Chile, three tectonic plates meet at a point known as the Chile Triple Junction. Two are oceanic plates, the Nazca and the Antarctic, which are separating in an active spreading center, creating ...
Earth Sciences
Aug 18, 2025
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