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_______ igneous rocks are composed of dark-colored minerals rich in magnesium and iron.

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

Discuss how large eruptions like Mt. Pinatubo in 1991 and Tambora in 1815 affected Earth’s climate.

The phenomenon of the Earth’s magnetic pole being in different locations in the past is known as _______.

In the figure below, _______ is the process that occurs when newly formed crystals are lighter than magma and float to the top of the magma chamber  

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

The island depicted in the diagram acts as                     .                    

In the figure below, rocks at a temperature of _______ have pressures of approximately 5000mpa.  

Atoms with the same atomic number but different mass numbers are called

Crystals of the same type (i.e. quartz) all have a similar shape with flat crystals and specific angles between crystal faces. What controls this predictable geometry?