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Etna is one of the largest continental volcanoes. The base of the volcano is about 36 by 24 miles (60 x 40 km). Below
an elevation of about 9,500 feet (2,900 m) Etna is a shield. The upper 1,200 feet (400 m) is a stratovolcano made of several
coalesced vents. Much of the surface of the volcano is covered by historic lava flows. Most eruptive products are made of
andesite. The eruption rate of Etna is about one-sixth that of Kilauea
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