rhyolite magma

GLOSSARY OF VOLCANIC TERMS
A magma which contains greater than 68% silica by weight.

Glossary of volcanic terms. - University of Wisconsin Oshkosh. . 2001.

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  • rhyolite — ALASKA VOLCANO OBSERVATORY GLOSSARY Volcanic rock (or lava) that characteristically is light in color, contains 69% silica or more, and is rich in potassium and sodium. GLOSSARY OF VOLCANIC TERMS A volcanic rock containing greater than 68% silica …   Glossary of volcanic terms

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