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13 Cards in this Set
- Front
- Back
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Volcano |
Opening in earths surface that erupts sulfurous gasses, ash,and lava,can form at earths plates boundaries where plates move apart or together and at hot spots |
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Vent |
Opening where magma is forced up and flows out onto earths surface as lava, forming a volcano |
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Crater |
Steep-walled depression around a volcanos vent |
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Hot spot |
The result of an unusually hot area at the boundaries between earths mantle and core that form a volcano when melted rock is forced upward and breaks through the crust |
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Shield volcano |
Broad,gentle sloping volcano formed by quiet eruptions of basaltic lava |
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Tephra |
Bits of rock or solidified lava dropped from the air during an explosive volcanic eruption, ranges in size from volcanic bombs and blocks |
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Cinder cone volcano |
Steep-sided, loosely packed volcano formed when tephra falls to the ground |
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Composite volcano |
Built by alternating explosive and quite eruptions that produce layers of tephra and lava;found mostly when earths plates come together and one plate sinks below the other |
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Batholiths |
Largest intrusive igneous rock body that forms when magma being forced upward towards Earth's crust coils slowly and solidifies underground |
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Dike |
Igneous rock feature formed When magma is squeezed into a vertical crack that cuts across rock layers and hardens underground |
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Sill |
Igneous feature formed when magma is squeezed into a horizontal crack between layers of rock and hardens underground |
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Volcanic neck |
Solid ingeous core of a volcano left behind after the softer cone has been eroded |
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Caldera |
Large,circular-shaped opening formed when the top of a volcano collapses |
