Category 1
An opening in the crust of the earth through which lava, ash, and gases flow; a depositional mountain built from the accumulation of the material that flows from such an opening
What is a Volcano?
sharp, fragmented, solidified lava, including ash, cinders, bombs, and blocks
What is Pyroclastic Material?
a medium-sized volcano built up of deposits of lava from quiet eruption alternating with layers of pyroclastic materials from explosive eruptions
any process or feature that involved the forcible entry of magma into a preexisting rock formation
What is Intrusive Volcanism?
having to do with molten or formerly molten earth materials
What is Igneous?
rock fragments and particles ejected by a volcanic eruption
What is Tephra?
a volcano that is currently erupting or has erupted during a recorded history
What is an Active Volcano?
an intrusive igneous feature that formed when a large volume of magma collected, cooled, and solidified within a chamber in the earth's crust
What is a pluton?
an opening in the earth's crust from which lava, ash, and gases can escape
What is a Vent?
a thick layer of igneous rock that covers a large area of the earth's surface
What is Flood Basalt?
A volcano that has not erupted within recorded history. Seismic activity beneath it may indicated that it could erupt in the future.
What is a Dormant Volcano?
the rate at which temperature rises with increasing depth into the earth's interior
What is Geothermal Gradient?
molten rock that has escaped from the earth's interior
What is Lava?
a broad, flattened, dome-shaped volcano built up by successive quiet eruptions of runny lava
What is a Shield Volcano?
A volcano that has never erupted within historical times, shows no seismic activity, and is often heavily eroded
What is an Extinct Volcano?
a hot spring that forcefully ejects hot water and steam from the ground at regular intervals
What is a Geyser?
What is a Crater?
a small, steep-sided volcano made mainly of cinder-like pyroclastic materials.
What is a Cinder Cone?
an intensity scale that rates a volcano's destructiveness and explosive power on the basis of the amount of matter that it ejects during an eruption
What is Volcanic Explosivity Index (VEI)?
The energy generated and stored in the earth that can be harnessed to generate electrical power and heat
What is Geothermal Energy?