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Name
Date
Section 18.1 Magma
(continued)
Main Idea
Details
Types of Magma
Use with page 473.
Surtsey
Vesuvius
Mt. St. Helens
Mt. Unzen
Mt. Fuji
Kilauea
Etna
Parícutin
Pinatubo
Mariana
Islands
Pelé
e
Mauna Loa
Nevado del Ruiz
Galapagos
Islands
Krakatau
Kilimanjaro
Tambora
Easter
Island
Deception
Island
Identify types of volcanoes. Write basaltic, andesitic, or rhyolithic
to the left of each description.
Volcanoes that are found along continental margins. In
the figure above, circle two such volcanoes in red.
Volcanoes in which rocks in the upper mantle melt. In
the figure above, circle two such volcanoes in blue.
Viscosity
Use with page 475.
Compare the explosiveness, viscosity, and gas content of Surtsey to
Tambora.
Organize information about types of magna by completing the
table below.
Andesetic
Magma
Gas content
Silica Content
Viscosity
Explosives
204
Section 18.1 Magma
4-6%
About 50%
About 10%
Intermediate