All Tertiary acid lavas are included under rhyolites.
2.
Volcanoes with acid lava tend to erupt much more violently ( eg Mount Etna, Mount St . Helens . . . ) than volcanoes with basic lava, where a gentle eruption lasting months at a time ( eg Kilauea on Hawai'i, the ( talk ) 08 : 51, 8 December 2005 ( UTC)
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