With unprecedented clarity, scientists have directly observed a subduction zone—the collision point where one tectonic plate dives beneath another—actively breaking apart.
With unprecedented clarity, scientists have directly observed a subduction zone—the collision point where one tectonic plate dives beneath another—actively breaking apart. The discovery, reported in Science Advances, sheds new light on how Earth’s surface evolves and raises fresh questions about future earthquake risks in the Pacific Northwest.
Subduction zones are the sites of Earth’s most powerful tectonic events. They drive continents across the globe, unleash devastating earthquakes and volcanic eruptions, and recycle the planet’s crust deep into the mantle.
But they don’t last forever. If they did, continents would endlessly collide and stack up, erasing oceans and wiping out the record of Earth’s past. The big question geologists have wrestled with is: how exactly do these mighty systems finally shut down?
“Getting a subduction zone started is like trying to push a train uphill—it takes a huge effort,” said Brandon Shuck, an assistant professor at Louisiana State University and lead author of the study. “But once it’s moving, it’s like the train is racing downhill, impossible to stop. Ending it requires something dramatic—basically, a train wreck.” Shuck conducted the research while he was a postdoctoral research fellow at the Lamont-Doherty Earth Observatory, which is part of the Columbia Climate School.
Read More: Columbia Climate School
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