Deep Beneath The Pacific Ocean, Earth's Crust Is Tearing Itself Apart

Strange features of a collision point between pieces of Earth's crust are evidence that the structure may be nearing its end, new analysis suggests.

A careful analysis of the complex boundary where four tectonic plates meet reveals that one of the slabs is tearing itself apart. This process is likely part of the normal life cycle of what's known as a subduction zone, preventing the plates from endlessly pushing into each other and erasing geological history.

"Getting a subduction zone started is like trying to push a train uphill – it takes a huge effort," says geologist Brandon Shuck of Louisiana State University. "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."

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