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Volcano Ch 6

Volcanoes

QuestionAnswer
Batholith Largest intrusive igneous rock body that forms when magma being forced upward toward Earth's crust cools slowly and solidifies underground.
Caldera Large, circular-shaped opening formed when the top of a volcano collapses.
Cinder Core Volcano Steep-sided, loosely packed volcano formed when tephra falls to the ground.
Crater Steep-walled depression around a volcano's vent.
Dike Igneous rock feature formed when magma is squeezed into a vertical crack that cuts across rock layers and hardens underground.
Hot Spot The result of an unusually hot area at the boundary between Earth's mantle and core that forms volcanoes when melted rock is forced upward and breaks through the crust.
Shield Volcano Borad, gently sloping volcano formed by quiet eruptions of basaltic lava.
Sill Igneous rock feature formed when magma is squeezed into a horizontal crack between layers of rock and hardens underground.
Tephra Bits of rock or solidified lava dropped from the air during an explosive volcanic eruption; ranges in size from volcanic ash to volcanic bombs and blocks.
Vent Opening where magma is forced up flows out onto Earth's surface as lava, forming a volcano.
Volcanic Neck Solid igneous core of a volcano left behind after the softer cone has been eroded.
Volcano Opening in Earth's surface that erupts sulfurous gases, ash, and lava; can form at Earth's plate boundaris, where plates move apart or together, and at hot spots.
Composite Volcano Volcano built by alternating explosive and quiet eruptions that produce layers of tephra and lava; found mostly where Earth's plates come together and one plate sinks below the other.
Created by: kyu
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