Chapter 7 - Section 4 - Volcanic Landforms Flashcards
What are the three main types of volcanoes?
Shield volcano
Cinder Cone Volcanoes
Composite Volcanoes
What features form as a result of magma hardening beneath Earth’s surface?
batholith
What can geothermal energy be used for?
to generate electricity.
After millions of years, what landform forms from hardened magma in the pipe of an extinct volcano?
volcanic neck
What are some features found in areas of geothermal activity?
hot springs
geysers
What causes a geyser to erupt?
rising hot water and steam become trapped underground
Pressure builds until the mixture suddenly sprays above the surface as a geyser.
shield volcano
A wide, gently sloping mountain made of layers of lava and formed by quiet eruptions.
cinder cone
A steep, cone-shaped hill or small mountain made of volcanic ash, cinders, and bombs piled up around a volcano’s opening.
composite volcano
A tall cone-shaped mountain in which layers of lava alternate with layers of ash and other volcanic materials.
caldera
The large hole at the top of a volcano formed when the roof of a volcano’s magma chamber collapses.
volcanic neck
A deposit of hardened magma in a volcano’s pipe.
dike
A slab of volcanic rock formed when magma forces itself across rock layers.
sill
A slab of volcanic rock formed when magma squeezes between layers of rock
batholith
A mass of rock formed when a large body of magma cools inside the crust.
geothermal activity
The heating of underground water by magma.
