Pillow lava stacks like underwater cushions when molten rock hits the sea
When lava pours into water, the outer skin quenches into a glassy rind while molten interiors keep bulging forward, stacking rounded pillow lavas on the seafloor.
Divers and geologists recognize the shapes as proof of underwater eruptions, from mid-ocean ridges to coastal flows. Pillows can pile into thick sequences that later uplift into cliffs.
Fire meets ocean and invents a quilt of stone. Pillow lava shows eruption style is written in the shape of the rock itself.
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