Rhyodacite
- Rhyodacite
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La rhyodacite est une roche volcanique extrusive de roche dont la composition constitue un intermédiaire entre la dacite et la rhyolite. C'est l'équivalent extrusif de la granodiorite. Des phénocrystes de sodium, riches en plagioclase, sanidine, quartz, et biotite ou hornblende sont typiquement placés dans un aphanitic à la lumière vitreuse à la matrice colorée intermédiaire. La rhyodacite est une roche à haute teneur en silice et se trouve souvent sous forme de dépôts volcaniques pyroclastiques explosifs.
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Rhyodacite — is an extrusive volcanic rock intermediate in composition between dacite and rhyolite. It is the extrusive equivalent of granodiorite. Phenocrysts of sodium rich plagioclase, sanidine, quartz, and biotite or hornblende are typically set in an… … Wikipedia
rhyodacite — ALASKA VOLCANO OBSERVATORY GLOSSARY An extrusive rock intermediate in composition between dacite and rhyolite … Glossary of volcanic terms
rhyodacite — rhyo·dacite … English syllables
rhyodacite — |rīō+ noun Etymology: rhyolite + dacite : a rock intermediate between rhyolite and dacite that is the extrusive equivalent of granodiorite … Useful english dictionary
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