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Mount Mazama is a composite volcano. It is made of multiple layers of lava flows and fragmented debris. Mount Mazama had a violent eruption around 5677 B.C., which caused the main height of the volcano to collapse and cr... More »

www.reference.com Science Earth Science Volcanoes

Mount Mazama last erupted in 2290 B.C. The eruption was so severe that the volcano collapsed, forming a caldera. This means that during the eruption, the volcano sank into the ground, creating a giant crater. The crater ... More »

Crater Lake in Oregon is 1,943 feet deep, according to the National Park Service. That makes Crater Lake the deepest U.S. lake and the world's ninth deepest. More »

www.reference.com Geography Bodies of Water
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Mount Mazama last erupted in 2290 B.C. The eruption was so severe that the volcano collapsed, forming a caldera. This means that during the eruption, the volcano sank into the ground, creating a giant crater. The crater ... More »

Mount Vesuvius is a volcano that is roughly 4,300 feet tall, according to About.com's Ancient/Classical History expert. It is located in Italy, near the Bay of Naples. More »

Mount Vesuvius, a volcano off the west coast of Italy, is one of the only active volcanoes on Europe's mainland. It is part of the Campanian volcanic arc, which rests on a tectonic boundary where the African plate is bei... More »

www.reference.com Science Earth Science Volcanoes

Mount Kilauea on the Big Island of Hawaii is a shield volcano. Its continuous lava flow since 1983 is a defining characteristic of a shield volcano. More »