Volcanoes ch.6
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| Magma | molten mixture of rock forming sub., gases and water deep in earths crust
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| Silica | The more of this that magma contains, the thicker the magma is
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| Pyroclastic flow | this happens when an explosive eruption hurls ash, cinders, bombs and gases out of a volcano
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| Shield | wide gently sloping mtn.made of hardened
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| Volcanic neck | This forms when magma hardens in a volcanoes pipe and later is exposed
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| Volcanoe | A weak spot in the crust where magma comes through
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| Pahoehoe and aa are produced during | Quite eruptions
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| Geysor | Hot water and steam that erupts from the ground
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| Batholith | mass of rock formedwhen a large body of magma colled inside earth's crust
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| Caldera | When the top of a volcanic mtn. collapses this forms
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| Hot spot | area where magma melts through the crust in the middle of a plate
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| Magma chamber | Inside a volcano, magma collects inside the pocket
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| potassium/ volcanic ash | soils are fertile because of this
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| Shield volcanoes | Layers of thin running lava that flow over a wide area before they cool and harden can build up.
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| active | volcanoes that show signs of eruption or future eruption
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Created by:
J.A
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