Caldera-forming eruptions do not involce lava flows but massive plumes of ash and pumice. The material produced is usually rhyolite. After a caldera-forming eruption, however, the composition can shift, especially since eruptions can be triggered by the mixing of different types of magma.
No. Caldera and shield volcanoes are quite different. Shield volcanoes usually undergo effusive eruptions, the least violent type and produce basaltic lava. Caldera forming volcanoes erupt explosively and are the most violent. They generally produce rhyolitic lava.
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Volcanoes with high levels of water in their lava produce ash, those with dry lava produce no ash.
Depends, all volcanoes have different amounts of lava.
shield, cinder cone, composite, and dome. They produce basaltic lava, rhyolite lava and andesite lava.
No. Caldera and shield volcanoes are quite different. Shield volcanoes usually undergo effusive eruptions, the least violent type and produce basaltic lava. Caldera forming volcanoes erupt explosively and are the most violent. They generally produce rhyolitic lava.
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They produce basaltic lava.
Volcanoes with high levels of water in their lava produce ash, those with dry lava produce no ash.
No.
No. Cinder cones erupr basaltic and occasionally andesitic lava. "Granitic" lava, called rhyolitic when it is erupted, erupts primarily from composite volcanoes (also called stratovolcanoes), and some caldera volcanoes.
Volcanoes can produce lava, ash, and gas.
Depends, all volcanoes have different amounts of lava.
Lava is the liquid rock that comes out of volcanoes.
shield, cinder cone, composite, and dome. They produce basaltic lava, rhyolite lava and andesite lava.
Lava domes usually consist of rhyolite or dacite lava.
Shield volcanoes produce low-silica lava.