VOLCANO an opening in the earth's surface
VULCAN the name ancient Roman gods gave to volcanoes
MAGMA melted rock inside the earth
CONDUIT channel in a fractured part of the rock
LAVA magma that has escaped
PAHOEHOE folded sheets of rock
TEPHRA rock fragments
GAS pours out of volcanoes in larage quantities
ERRUPTIONS flowing magma and lava from volcano
DUST volcanie particles less than 1/100 inch
ASH volcanic fragments less than 1/3 inch in diameter
DOMES - mounds of lava
CENTRAL VENT opening which lave and magma blast from
CHAMBER the reservoir from which volcanic material errupts
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