Definitions (1)
A major belt of volcanoes located in the Pacific Rim.
What is The Ring of Fire
A sleeping volcano that is currently inactive but expected to awake in the near future.
What is a dormant volcano
A bowl-shaped area that forms at the top of a volcano around the central vent.
What is the crater
A steep, cone-shaped hill or small mountain that results from materials building up around the vent.
What are quiet and explosive.
A molten mixture of rock-forming substances
What is magma
The landform created as magma hardens in a volcano's pipe and the surrounding rock later wears away.
What is a volcanic neck
A long tube that extends from the Earth's crust through the top of the volcano.
What is the pipe
A mass of rock formed when a large body of magma cools inside the crust.
What is a batholith
An element present in large quantities in an explosive eruption. It makes the magma "sticky" and creates a "corking" effect in the vent.
What is silica
The hole left when a volcano collapses
What is a caldera
An area where material from deep within Earth's mantle rises through the crust and melts to form magma.
What is a hot spot
A place where magma collects
Magma that squeezes between horizontal rock layers and hardens
What is a sill
The force of this state of matter forces magma from the chamber.
A volcano built from lava flowing out to create a wide, gentle sloping mountain.
What is a shield volcano
An instrument used to detect slight surface changes in elevation and tilt caused by magma moving underground.
What is a tiltmeter
The opening in the top of the volcano where magma leaves.
What is the vent
The pushing up of a magma from below the surface creates this landform.
What is a dome mountain
A stage of volcanic eruption that means the volcano is NOT likely to erupt ever again.
What is extinct
Magma that forces itself across rock layers on a diagonal and hardens.
What is a dike
The mixture of hot gases, ash, cinders, and bombs that flow down the sides of a volcano when it erupts explosively.
What is pyroclastic flow
The spread of lava as it pours out of the vent.
What is lava flow
Tall, cone-shaped mountains in which layers of lava alternate with layers of ash.
A high elevation, flat landform that results from repeated floods of lava.
What is a lava plateau