ࡱ> xzw{ bjbjzz *{8N Zx$^%%:P=ovP0   (%%kX  : Volcanic Terminology Term DefinitionConvergent plate boundaryPyroclastic material which is over 64mm in size, often associated with explosive eruptionsDivergent plate boundaryMaterial which is erupted from a volcanic cone into the the atmosphere.Crustal deformationPyroclastic material between the sizes of 2-64mm.ViscosityVolcanic mudflows which are formed to due mixing of pyroclastic material with water/ice.LavaMagma which has slightly cooled from its mantle temperature and is often low in viscosity and gas.BasaltTransformation of the Earths crust leading to a change in its shape or cracks forming within.Fire fountainsTectonic plates which move apartPyroclastic flowMagma which have cooled to 700-900 degrees C which often contain fewer crystals associated with its origin in the mantle. Linked to explosive volcanoes.LaharA style of eruption, of low level explosivity, which fires magmatic material up to couple of hundred meters in the air.Acidic magmatic materialA rock type often linked to divergent plate boundaries and hotspots which is formed at 1000-1200 degrees C. Eruption columnAn eruption style associated with low levels of explosivity and low viscous lava flows.Basic magmatic materialA measurement of a fluids resistance to flow. TephraTectonic plates which move towards each otherAshA stationary volcanic plume associated with the formation of ocean islands. These characteristically erupt basaltic materialLapilliMagmatic material which is erupted onto the surface and flows over the surfaceBombsHighly evolved, acidic product associated with the most dangerous eruptionsHotspotNamed after the South American mountain range, where volcanoes erupting this material is common, these rocks are more evolved than basalt.AndesiteA large turbulent gas cloud travelling down the flanks of the volcano, carrying pyroclasts, at high speeds and temperatures.EffusiveThe plume of pyroclastic material created in the atmosphere as a consequence of the eruptionRhyolitePyroclastic material below 2mm in size, associated with explosive eruptionsSpectroscopyA linear feature of divergence, associated with basaltic volcanism.StratovolcanoA scientific method involving the study of light, specifically radiated material, through wavelength.Fissure A large, steep volcanic edifice, associated with convergent plate boundary volcanism. Composed of lava and pyroclastic material, linked to explosive volcanism. Correct answers: Term DefinitionConvergent plate boundaryTectonic plates which move towards each otherDivergent plate boundaryTectonic plates which move apartCrustal deformationTransformation of the Earths crust leading to a change in its shape or cracks forming within.ViscosityA measurement of a fluids resistance to flow. LavaMagmatic material which is erupted onto the surface and flows over the surfaceBasaltA rock type often linked to divergent plate boundaries and hotspots which is formed at 1000-1200 degrees C. Fire fountainsA style of eruption, of low level explosivity, which fires magmatic material up to couple of hundred meters in the air.Pyroclastic flowA large turbulent gas cloud travelling down the flanks of the volcano, carrying pyroclasts, at high speeds and temperatures.LaharVolcanic mudflows which are formed to due mixing of pyroclastic material with water/ice.Acidic magmatic materialMagma which have cooled to 700-900 degrees C which often contain fewer crystals associated with its origin in the mantle. Linked to explosive volcanoes.Eruption columnThe plume of pyroclastic material created in the atmosphere as a consequence of the eruptionBasic magmatic materialMagma which has slightly cooled from its mantle temperature and is often low in viscosity and gas.TephraMaterial which is erupted from a volcanic cone into the the atmosphere.AshPyroclastic material below 2mm in size, associated with explosive eruptionsLapilliPyroclastic material between the sizes of 2-64mm.BombsPyroclastic material which is over 64mm in size, often associated with explosive eruptionsHotspotA stationary volcanic plume associated with the formation of ocean islands. These characteristically erupt basaltic materialAndesiteNamed after the South American mountain range, where volcanoes erupting this material are common, these rocks are more evolved than basalt.EffusiveAn eruption style associated with low levels of explosivity and low viscous lava flows.RhyoliteHighly evolved, acidic product associated with the most dangerous eruptionsFissureA linear feature of divergence, associated with basaltic volcanism.SpectroscopyA scientific method involving the study of light, specifically radiated material, through wavelength.StratovolcanoA large, steep volcanic edifice, associated with convergent plate boundary volcanism. Composed of lava and pyroclastic material, linked to explosive volcanism.     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