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13 Cards in this Set
- Front
- Back
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carbon dioxide
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a gax making up less than 1% of the atmosphere and which is toxic to humans at concentrations of several percent
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chlorine
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a naturally occurring gaseous element
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energy line
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theoretical line indicating positions at which a pyroclastic density current could reach at various distances from a volcano
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lahar
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a mudflow associated with volcanic action or involving volcanic material
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lava flow
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flowing of magma out of a ground surface
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pumice
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frothy volcanic rock dominated by gas bubbles enclosed in glass; typically pale in colour and floats on water
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pyroclastic density current (PDC)
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high-velocity, high temperature, high-density flow or surge of volcanic tephra, gases, and debris.
-responsible for many deaths in eruptions |
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sulfur dioxide
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a toxic volcanic gas
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tephra
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fine materials (dust, ash and cinders) produced by volcanic action
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tuff
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a rock formed by consolidation of volcanic tephra
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tuya volcanoes
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flat-topped volcano formed by eruption under a glacier
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volcanic weather
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weather generated during a volcanic eruption
-high temperature draws in outside air that also rises and cools -moisture in the air condenses to form rain/storms |
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welded tuff
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ash from a hot pyroclastic density current that is hot enough when deposited that particles fuse together to form a solid rock
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