Exam 6: Volcanoes and Igneous Rocks

When magma is injected horizontally between layers and solidifies,a(n)_______ forms.

The eruption of _______ in 1815 resulted in the "year without a summer".

The most violent volcanic eruptions in history are classified as _______ eruptions.

Aside from lava flows,what are some additional hazards associated with volcanoes.

Intermediate sized tephra is called _______.

Hawaiian eruptions are extremely violent and produce large pyroclastic flows.

Mt.St.Helen's erupted on May 18,1980 and blanketed most of the northwestern United States with ash.

Fine grained igneous rocks have a(n)_______ texture.

According to the figure below,an increase in depth results in an increase in melting temperature.

Basaltic magma has a high amount of dissolved gases and is very explosive.

The figure below is an igneous rock with what kind of texture? Hint: Do not be confused by the holes.

In the figure below,rocks at a depth of 300km will have associated pressures of about _______.

In the figure below,albite crystals will melt slower as a result of an increase in temperature rather than an increase in pressure.

_______ is the separation of melted materials from the remaining solid material during the course of melting.

In the figure below,what is the correlation between temperature and pressure?

Igneous rocks high in feldspars and silicates are known as felsic rocks.

How does the presence of water affect the melting temperature of a rock?

Molten rock that reaches Earth's surface is known as _______.

Rocks usually melt _______as fast under the seafloor as under the continents.

A volcanic pipe is a remnant of a channel that once fed magma to the vent.