| No devitrification textures are noted in either the exogenic or terrestrial varieties. |
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| Feldspars are added as orthoclase in order to reduce the devitrification of the glass. |
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| The presence of glass 4 billion years old on the Moon indicates that water is crucial to the rate of devitrification. |
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| These structures may be evidence of early nucleation and devitrification that preceded that in the surrounding host rhyolite. |
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| High-viscosity silica gel produced by the hydration and devitrification of volcanic ashes can eventually concentrate in any open space, such as the cast of a limb. |
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| All melt inclusions and matrix glasses chosen were completely glassy, i.e. they had not undergone any devitrification and did not contain microlites or microphenocrysts. |
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| We, also, attempted to illustrate the relationship between devitrification of the rigid amorphous fraction and crystallization kinetics. |
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| Disideologization, devitrification, pluralization of the view of facts is occurring, Mircev comments. |
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| The large range in U may be related to devitrification and alteration of the rhyolite groundmass. |
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| Loss of alkalies in volcanic glass by post-depositional alteration and devitrification has been well documented. |
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