Chapter 10 Study for Retest

The material ejected from a _____ forms slopes approximately 30-40 degrees, and are usually 300 meters in height.

Cinder Conde

Dust, ash, cinders and lapilli fragments are ejected from a _________

Cinder Cone

Most are part of the "Ring of Fire", their flows cause the most destruction and have andesitic lava flows.

Composite Cone

Mt. Rainier

Composite Cone

_____ is also called a strat-volcano.

Composite Cone

An eroded remnant of a pipe that once fed a volcano is called a(n)

Volcanic neck

How do scientists classify intrusive igneous features?

Shape, Size

Hawaii

Shield Volcano

Mauna Loa rises 9,170 m from the ocean floor to its summit (peak).

Shield Volcano

____ has broad layers, slow moving basaltic lava, gentle eruptions.

Shield Volcano

Most volcanoes occur at either divergent plate boundaries at ocean ridges or rifts; at convergent plate boundaries at subduction zones; or at hot spots, which are not plate boundaries, but are areas where hot mantle plumes cause volcanic activity.

This is a true statement.

Some volcanoes occur at intraplate locations, in areas known as hot spots, where hot mantle plumes rise up into the crust and result in volcanic activity at the surface.

This is a true statement.

What volcanic feature is illustrated at A in Figure 10-2?

continental volcanic arc (intraplate)

What feature is labeled D in Figure 10-1?

crater

A(n) ____________________ is a sheetlike body that is produced when magma is injected into a fracture that cuts across rock layers.

dike

The four basic types of plutons are:

dikes, sills, batholiths, laccoliths

Pyroclastic material are particles of rock, MAGMA, ash, and other volcanic fragments blown from the vent of a volcano.

false

Which best describes the origin of magma?

heat, pressure, water content

The most explosive volcanoes are produced by magma with ____________________ viscosity that contains a large quantity of dissolved gases and has a high silica content.

high

The Hawaiian Islands are associated with what type of volcanism?

intraplate volcanism

One thing all volcanic eruptions have in common is that they emit large amounts of gas.

true

A lava flow with a surface of rough, jagged blocks and sharp, angular projections is called a(n)

aa

If the feature labeled F in Figure 10-2 was exposed to erosion and reached over 100 square kilometers in area, it would be classified as a __________

batholith

A large depression at the summit of a volcano, which results from the violent collapse of the top of a composite volcano or when a volcano collapses into the empty magma chamber is called a ______

caldera

The most explosive volcanic eruptions come from the ____________________ type of volcano.

composite cone

What type of volcano is illustrated in Figure 10-1?

composite cone

What feature is labeled C in Figure 10-1?

lava flow

A wide area that forms when low-viscosity basaltic lava flows from fissures is known as a _____.

lava plateau

The number of years most hot spots have lasted is _____ of years.

millions

What type of plate boundary resulted in the volcanic activity illustrated in Figure 10-2?

oceanic-continental convergent plate boundary

Which of the following is NOT considered to be a pyroclastic material?

pahoehoe

What feature is labeled A in Figure 10-1?

pipe

The accumulation of fluid basaltic lava produces a(n) ____________________ volcano.

shield

A material's ____________________ is a measure of its resistance to flow.

viscosity