composite volcano


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Related to composite volcano: stratovolcano, Shield volcano

composite volcano

[kəm′päz·ət väl′kā·nō]
(geology)
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Code Symbol Description 7 circle composite volcano 8 filled circle composite volcano, historically active 9 cross cinder cone 10 asterisk boca/small vent 11 star maar/explosion vent 21 hexagon dome 22 filled hexagon dome, historically active 25 grey circle caldera 26 filled grey circle caldera, historically active 35 pentagon shield 36 filled pentagon obsidian dome
A third volcano type, the stratovolcano or composite volcano, is formed when alternating eruptions of gentle and explosive lavas build up moderately sloping sides.
Poas is a basaltic-andesite composite volcano located within the Cordillera Central in Costa Rica.