Volcanoes and Plate Boundaries
Inside a Volcano
Volcanic Landforms
Landforms from Magma
California Geology
100
a major volcanic belt
What is the ring of fire
100
magma collected beneath a volcano in a pocket
What is a magma chamber
100
Lava that flows gradually builds this wide, gently sloping mountain
What is a shield volcano
100
This forms when magma hardens in a volcanoes pipe
What is a Volcanic neck
200
a string of volcanic islands
What is an island arc
200
A long tube in the ground that connects the magma chamber to earths surface
What is a pipe
200
Materials build up around the vent in a steep, cone shaped hill or small mountain.
What is cinder cone
200
Magma that forces itself across rock layers hardens into this.
What is a dike
200
a huge basin with the Sierras and Coast Ranges on either side
What is the Central Valley
300
a molten mixture of rock-forming substances, gases, and water from the mantle
What is magma
300
Molten rock and gas leave the volcano through this opening
What is a vent
300
Tall cone shaped mountains in which layers of lava alternate with layers of ash
What is a composite volcano
300
When magma squeezes between horizontal layers of rock, this forms.
What is a sill
300
a material found in magma that is formed from the elements oxygen and silicon
What is Silica
400
a weak spot in the crust where molten material, or magma, comes to the surface
What is a volcano
400
The area covered by lava as it pours out of a vent
What is a lava flow
400
A huge hole left by the collapse of a volcanic mountain
What is a caldera
400
This forms when magma hardens under ground to form igneous rock.
What is intrusion
400
a type of explosive eruption that hurls out a mixture of hot gases, ashes, cinders, and bombs
What is pyroclastic flow
500
when magma reaches the surface
What is lava
500
a bowl-shaped area that may form at the top of a volcano around the central vent
What is a crater
500
A fountain of water and steam that erupts from the ground
What is a geyser
500
A massive rock that forms when a live body of magma cools inside the crust.
What is a batholith
500
a sleeping volcano
What is a dormant volcano
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