A quantitative understanding of crystallization and solidification is central to appreciating a variety of phenomena at the interface between volcanology and petrology. Interpretation of magmatic processes from the textures of erupted lavas and pyroclasts in turn depends upon understanding how textures evolve during cooling, decompression, and devolatilization. Crystal size, shape, and compositional distribution depend upon the underlying phase equilibria, mass transport processes, and kinetics of reactions at interfaces. Applications of kinetics in physical volcanology include estimating intra-eruptive magma residence times using crystal growth rates (e.g., Mangan 1990); interpreting perturbations in the melt composition or thermal state from microtextures (e.g.,...

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