New Study Links Yellowstone Hotspot to Vanished Farallon Plate

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A new study published in Science challenges the long-held geological model of how deep material from the Earth's interior reaches the surface far from tectonic plate boundaries. The research suggests that the Yellowstone hotspot is powered by stresses from the vanished Farallon plate, rather than a traditional mantle plume.

Why it matters

This discovery could fundamentally change how scientists understand the geological history and future volcanic hazards of the Yellowstone region. The findings indicate that the movements and disappearance of ancient oceanic plates continue to influence volcanic activity far inland, rather than the commonly accepted mantle plume model.

The details

The Farallon plate was an ancient oceanic plate that has largely disappeared beneath the North American continent. Its historical movements were instrumental in shaping the West Coast, as the plate slammed large island chains into the continent during its subduction process. According to the new research, remnants of this plate continue to impact geological processes, with the plate's vanishing act creating specific stresses that opened pathways for molten rock to reach the surface at the Yellowstone hotspot.

• The most recent caldera-forming supereruption at Yellowstone, known as the Lava Creek Eruption, took place 640,000 years ago.

What’s next

Identifying the forces that drive the Yellowstone hotspot is critical for assessing future volcanic hazards. The new research could improve forecasting efforts by transitioning the scientific paradigm from a simple mantle plume model to one that incorporates plate tectonic stresses.