E a transformation from a bubbly liquid to a gas

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Unformatted text preview: ning fragments of liquid. Restricted to gas-rich silicic magmas. 9 Physics of Volcanic Explosions The traditionally qualitative and observation-oriented field of volcanology began a transformation into quantitative science in about the 1970’s when modern volcanologists began asking why and how and applying physics to find the answers. Understanding volcanic eruptions involves both application of physical laws and geologic observations. Role of Gas Exsolution and Bubbles Gas acts as the propellant in all volcanic explosions. T h is g a s g e n e r a lly o r ig in a te s a s w a te r a n d C O 2 d is s o lv e d in th e m a g m a . ( H o w e v e r , o th e r s o u r c e s o f w a te r , e .g ., g r o u n d w a te r c a n b e im p o r ta n t - p a r tic u la r ly in v u lc a n ia n e x p lo s io n s ) . C o n s e q u e n tly , u n d e r s ta n d in g its d is s o lu tio n a n d s u b s e q u e n t g r o w th o f b u b b le s is k e y to u n d e r s ta n d in g e x p lo s io n s . 10 Bubble Nucleation Exsolution of gas from magma results in forma...
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