Recent questions tagged earth

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A small, igneous rock body emplaced at shallow depths by uplift and arching of the overlying, older strata is a ________

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Which type of basaltic lava flow has its surface covered with sharp-edged, angular blocks and rubble?

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________ tend to increase the explosive potential of a magma body beneath a volcano.

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________ the big volcanoes of Hawaii.

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________ the volcanoes of southwestern Alaska and the Aleutian Islands.

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________ small basaltic cones built during one, short, eruptive episode.

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________ large, fairly steep-sided cones composed of lavas and pyroclastic layers.

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Which statement about the May, 1980, eruption of Mount St. Helens is false?

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________ massive, gently sloping volcanoes built of successive, basaltic lava flows.

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________ are usually the most abundant gases emitted during basaltic volcanism.

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Which of the following phenomena accompanied the year without a summer (1816) in parts of North America and northern

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Pockets of magmas can be formed by the melting of deep continental crust heated by the intrusion of other magmas.

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Which of the following best describes seamounts and islands of the deep ocean basins?

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Why would a plume of solid silicate rock rising slowly from deep in the mantle begin melting as it neared the base of

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Which of the following is associated with deep mantle hot spots?

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Which was the most powerful, explosive volcanic eruption of historic time?

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The ________ ocean basin is rimmed by the most subduction zones.

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The 1991 Pinatubo eruption in the Philippines caused brilliantly colored sunrises and sunsets to be seen for the next

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________ magma is the most abundant type of erupted at oceanic spreading centers.

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What fate befell the 'Lost City of Atlantis' mentioned in Plato's writings?

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Which natural phenomenon occurs for many years after major explosive volcanic eruptions such as Tambora and Pinatubo?

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Volcanic bombs originate ________.

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________ is a major dissolved volatile constituent in both magmas and volcanic gases?

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Which type of basaltic lava flow has a fairly smooth, unfragmented, ropy surface?

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In 1980, ________ was the first Cascade Range volcano to erupt since Mt. Lassen, California, in 1915-16.

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