Rhyodacite

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Notion

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Science and technology

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What Wikipedia says

Rhyodacite is a volcanic rock intermediate in composition between dacite and rhyolite. It is the extrusive equivalent of those plutonic rocks that are intermediate in composition between monzogranite and granodiorite. Rhyodacites form from rapid cooling of lava relatively rich in silica and low in alkali metal oxides.

Excerpt from the Wikipedia article “Rhyodacite”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Auteur inconnu, CC BY 2.0, via Wikimedia Commons.