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20 Cards in this Set

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SAID OF A VOLCANO THAT DOES NOT SHOW SIGNS OF ERUPTING IN THE NEAR FUTURE
DORMANT VOLCANO
VOLCANO THAT IS ERUPTING OR HAS SHOWN SIGNS OF ERUPTING IN THE NEAR FUTURE
ACTIVE VOLCANO
A STEEP, CONE-SHAPED HILL OR MOUNTAIN MADE OF VOLCANIC ASH, CINDERS, AND BOMBS PILED UP AROUND A VOLCANO'S OPENING
CINDER CONE VOLCANOES
A BOWL-SHAPED AREA THAT FORMS AROUND A VOLCANO'S CENTRAL OPENING
CRATER
A HOT, FAST-MOVING TYPE OF LAVA THAT HARDENS TO FORM SMOOTH, ROPE-LIKE COILS
PAHOEHOE
THE OPENING THROUGH WHICH MOLTEN ROCK IS SHARPLY DIFFERENT FROM THE SURROUNDING ROCK
VENT
A WIDE, GENTLY-SLOPING MOUNTAIN MADE OF LAYERS OF LAVA AND FORMED BY QUIET ERUPTIONS
SHIELD VOLCANO
A MASS OF ROCK FORMED WHEN A LARGE BODY OF MAGMA COOLED INSIDE THE CRUST
BATHOLITH
SAID OF A VOLCANO THAT IS UNLIKELY TO ERUPT AGAIN
EXTINCT
THE MOLTEN MIXTURE OF ROCK-FORMING SUBSTANCES, GASES, AND WATER FROM THE MANTLE
MAGMA
A LONG TUBE THROUGH WHICH MAGMA MOVES FROM THE MAGMA CHAMBER TO EARTH'S SURFACE
PIPE
A SLAB OF VOLCANIC ROCK FORMED WHEN MAGMA SQUEEZES BETWEEN LAYERS OF ROCK
SILL
A MATERIAL THAT IS FORMED FROM THE ELEMENTS OXYGEN AND SILICON; FOUND IN MAGMA
SILICA
A WEAK SPOT IN THE CRUST WHERE MAGMA HAS COME TO THE SURFACE
VOLCANO
A SLAB OF VOLCANIC ROCK FORMED WHEN MAGMA FORCES ITSELF ACROSS ROCK LAYERS
DIKE
AN AREA WHERE MAGMA FROM DEEP WITHIN THE MANTLE MELTS THROUGH THE CRUST ABOVE IT
HOT SPOT
THE EXPULSION OF ASH, CINDERS, BOMBS, AND GASES DURING AN EXPLOSIVE VOLCANIC ERUPTION
PYROCLASTIC FLOW
THE POCKET BENEATH A VOLCANO WHERE MAGMA COLLECTS
MAGMA CHAMBER
LIQUID MAGMA THAT REACHES THE SURFACES; ALSO THE ROCK FORMED WHEN LIQUID MAGMA HARDENS
LAVA
THE LARGE HOLE AT THE TOP OF A VOLCANO FORMED WHEN THE ROOF OF A VOLCANO'S MAGMA CHAMBER COLLAPSES
CALDERA