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GILBERT J S Sparks R S J Future research directions on the physics of explosive
Woods A W Observations and models of volcanic eruption columns
DRUITT T H Pyroclastic density currents
approximately atmosphere becomes behaviour bubble calculated close cloud collapse concentration conduit constant controlled crystal decompression decrease degassing dense density dependence deposits described developed diffusion Dingwell dispersal distance dome dynamics effects energy equation eruption column et al example experimental experiments explosive fluid flux foam fraction fragmentation function Geological Geophysical Research given growth height ignimbrite important increase initial Journal Journal of Geophysical lateral lava layer liquid magma mass material measured mechanism melt mixture motion Mount St Helens natural nucleation observed occurs particles phase physical plume predicted pressure processes properties pumice pyroclastic flows radius range ratio relatively Research rhyolite rise samples scale shows silicic Society Sparks studies surface surface tension surges temperature tion transport turbulent units values velocity vent vesicularity viscosity volatile volcanic volcanic eruptions volume walls Wilson Woods