Definition of "lavas" []

• Plural form of lava. (noun)

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• "Let those who have the opportunity to examine, say, what are to be found in proper lavas, that is, those of the erupted kind."
• "Hot springs rising through alkaline siliceous rocks, such as lavas, often deposit silica in a white spongy formation known as"
• "It is to these materials that the name of "lavas" is properly applied."