Geologists discover tectonic plate’s slippery underbelly

Dynamite blasts divulge runny layer roughly 100 kilometers below surface

Tectonic plate diagram

SLIP ‘N SLIDE  A layer of slippery, partially melted rock (red) may separate the Pacific tectonic plate from the underlying mantle, reducing the amount of force required to shift the massive plate, new seismic research suggests.

Tim Stern

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