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The Nature of Volcanoes

Volcanoes are built by the accumulation of their own eruptive products—lava, bombs (crusted over ash flows), and tephra (airborne ash and dust). A volcano is most commonly a conical hil…

Volcanoes

Mount Vesuvius and other volcanoes of the world by Ben Snowden Mount Vesuvius' 1944 eruption Other Volcanoes Mount St. Helens (Washington State) Mount Etna (Sicily) Mount K…

Volcano

Director: Mick JacksonWriters: Jerome Armstrong and Billy RayDirector of Photography:Theo van de SandeEditors:Michael Tronick and Don BrochuMusic:Alan SilvestriProduction Designer:Jackson Dego…

Volcanoes of the World

The Nature of VolcanoesRecent Volcanic ActivityThe Deadliest Volcanic EruptionsPrincipal Types of VolcanoesEarth's Greatest Volcanic FieldSource: U.S. Dept. of the Interior, Geological Survey …

Shield Volcanoes

Shield volcanoes are built almost entirely of fluid lava flows. Flow after flow pours out in all directions from a central summit vent, or group of vents, building a broad, gently sloping con…

Composite Volcanoes

Composite volcanoes, sometimes called stratovolcanoes, are typically deep-sided, symmetrical cones of large dimension built of alternating layers of lava flows, volcanic ash, cinders, blocks,…

Submarine Volcanoes

Submarine volcanoes and volcanic vents are common features on certain zones of the ocean floor. Some are active at the present time and, in shallow water, disclose their presence by blasting …

Principal Types of Volcanoes

Source: U.S. Dept. of the Interior, Geological Survey Cinder Cones Composite Volcanoes Shield Volcanoes Lava Domes Submarine Volcanoes …

Most Active Volcano

The Question: Which U.S. state has the largest active volcano? The Answer: Hawaii's Mauna Loa is not only the largest active volcano in the coun…