Download - 7th Grade Ch. 3 Sec. 4 Volcanic Landforms
Ch. 3 Sec. 4 Volcanic
Landforms
landforms from
lava & ash
shield volcano
cinder cone
volcano
composite volcano
lava plateau caldera
shield volcano
• Quiet eruptions • Gently sloping mountain
Mauna LoaEarth's Largest Volcano
cinder cone volcano• explosive eruptions
• ash, cinders & bombs
• cone-shaped hill
Paricutin in Mexico
composite volcano • tall cone
shaped mount.• quiet eruptions
(lava) alternate w/ explosive eruptions (ash)
lava plateau• layers of thin, runny lava build up high level area
calderacaldera•huge hole left huge hole left by collapse of by collapse of
volcanic mount.volcanic mount.
soils from lava & ash•fertile (rich) soil•plants grow well
Landforms From
magma
Volcanicneck dike sill batholith Dome
mountain
Volcanic neck• When magma hardens in volcano’s pipe
dike•Magma that forces itself across rock layers
sill•magma squeezes between horizontal layers of rock
batholith• large mass of rock forms when magma cools in crust
Dome mountain
• hardened magma
• forms when uplift pushes batholith toward surface
geothermalactivity
hot springs geyser geothermal
energy
hot springs• formed when
groundwater is heated by nearby body of magma or hot rock underground
geyser•Fountain of water & steam that erupts from ground
geothermal energy•water heated by underground source creates steam energy
•What is this volcano made of? How do geologists classify a volcano made of these materials? •What is the feature labeled A in the diagram? What is the feature labeled B? How do these features form? •What is the feature labeled C in the diagram? If this feature becomes plugged with hardened magma, what could happen to the volcano? Explain. •What is the feature labeled D in the diagram? What can you infer about this feature if the volcano becomes dormant?