Pillow Lava

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pillow lava [′pil·ō ‚läv·ə]

(geology)

Any lava characterized by pillow structure and presumed to have formed in a subaqueous environment. Also known as ellipsoidal lava.

Pillow Lava

lava that has been extruded into water. Flows appear as series of spheres 1-5 m in diameter, which are composed of glass along the margins and crystalline rock in the center.

Pillow Lava

basic (andesitic or basaltic) lava extruded into water and consisting of a series of spheres that fit closely upon one another. A glassy hardening zone is observed on the edges of each sphere; in the center of some large spheres, divergent part ing is observed. Pillow lava is found in volcanic oceanic beds in association with keratophyres and spilites. It also occurs as part of ophiolitic complexes.

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No references found			Pillow lava flows occur in underwater vents and look like rolling globs of lava. Volcanoes by Science Weekly The pasty rock often solidifies into rounded formations dubbed pillow lava. Hints of microbes in ancient ocean rocks by Perkins, S. / Science News There it underlies extrusive pillow lava and sheeted dikes and overlies mantle peridotite; it is also believed to represent the remains of magma chambers. Indian Ocean's Atlantis Bank yields deep-Earth insight by Dick, Henry J.B. / Oceanus			pillar of cloud, pillar of fire pillar piscina pillar press pillar robbing pillar split pillar-and-breast system pillar-and-room system pillar-and-stall system pillar-stone pillarbox pillaring Pillars of Hercules Pillau pillbox pillbox antenna Pillersdorf, Franz pilling Pillnitz Pillnitz, Declaration of 1791 pillory Pillot, Jean Jacques pillotina pillow breccia pillow capital pillow lace Pillow Lava pillow structure Pillow, Fort Pillow, Gideon Pillow, Gideon Johnson pillowed pillowwork Pillsbury Co. Pillsbury State Park Pillsbury, Charles Alfred Pillsbury, Harry Nelson Pillsbury, John E. Pillsbury, John Sargent pilmer Pilna Pilniak, Boris Pilniak, Boris Andreevich Pilnyak, Boris Pilobolus Dance Theater Pilocarpine Pilocarpus pilomotor nerve Pilomotor Nerve Fibers pilomotor reflex Pilon, Germain pilosebaceous			pillory pillory pillory pillorying pillorying pillorying pillorying Pillot, Jean Jacques pillotina pillow pillow pillow pillow pillow Pillow bier pillow block pillow block Pillow block bearing pillow breccia pillow capital pillow capital Pillow case Pillow case pillow fight pillow fight Pillow Fight League Pillow fighting pillow fights pillow lace pillow lace Pillow Lava Pillow lavas Pillow lavas Pillow of a plow pillow sham pillow shams pillow slip pillow slip pillow splint Pillow structure pillow talk pillow talk Pillow to Face Pillow Tripod Joint Pillow, Fort Pillow, Gideon Pillow, Gideon Johnson pillowcase pillowcase pillowcases pillowed pillowed pillowed Pillowfight Pillowhead pillowing pillowing pillows pillows pillowslip pillowslips

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