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Pillow Lava Technical Terms
Pillow Lava: A general term for lava displaying pillow structure (discontinuous, close-fitting, bun-shaped or ellipsoidal masses, generally < 1 m in diameter); considered to have formed in a subaqueous environment; such lava is usually basaltic or andesitic. Compare – `a`a lava, block lava, pahoehoe lava. SW, GG, & GS