Magma is composed of 3 components. Which component is the liquid portion of the magma?

Magma is composed of 3 components. Which component contains silicate crystals?

Magma is composed of 3 components. Which component is made up of dissolved gases?

Which of the following is NOT a common dissolved gas found in magam?

Which atoms link together first when a magma cools and begins to crystallize? Check all that apply.

Magma that crystallizes below the Earth's surface is termed intrusive. Another term for an intrusive igneous rock is...

Extrusive igneous rocks (also called volcanic rocks) are found...

Ferromagnesian silicates are rich in (check all that apply)...

Nonferromagnesian silicates are rich in (check all that apply)...

Which of these are ferromagnesian minerals? Check all that apply.

Which of these are nonferromagnesian minerals? Check all that apply.

Igneous Compositions: Igneous rock with light colored silicate minerals, composed largely of quartz and feldspar, and a major constituent of continental crusts.

Igneous Compositions: Igneous rock composed of dark silicates and calcium rich feldspar; makes up the ocean floor and volcanic islands.

Igneous Compositions: Igneous rock composed of 25% or more dark silicates; associated with volcanic islands arcs.

Igneous Compositions: Igneous rock composed of mostly olivine and pyroxene and which makes up most of the upper mantle.

Which of the following is a factor that affects crystal size in igneous rocks? Check all that apply.

A slow rate of magma cooling produces...

A fast rate of magma cooling produces...

Igneous Textures: Which igneous texture is associated with rapid cooling and microscopic crystals?

Igneous Textures: Which igneous texture is exceptionally coarse grained, and associated with late stage magma crystallization?

Igneous Textures: Which igneous texture is associated with voids left by the release of volatiles during the cooling process?

Igneous Textures: Which igneous texture is associated with slow cooling and large, visible, crystals?

Igneous Textures: Which igneous texture features large crystals (phenocrysts) embedded in a matrix of smaller crystals (groundmass)?

Igneous rocks are classified based on texture and ...

Identify the Igneous Rock: This is an abundant, phaneritic, rock that contains roughly 50% potassium feldspar.

Identify the Igneous Rock: This is an extrusive rock composed of light silicate minerals. It is typically light gray or pink in color.

Identify the Igneous Rock: This felsic rock has noticeable voids, floats in water, and is frequently found with obsidian.

Identify the Igneous Rock: This intrusive intermediate rock is coarse grained and similar to granite, but lacks visible quartz crystals. Its extrusive equivalent is andesite.

Magma is generated in what part of the Earth?

The greatest amounts of magma are produced at what kind of plate boundaries?

Temperatures in the upper crust increase with depth. This is known as the Geothermal Gradient. The rate of temperature increase in this gradient is about...

The idea that reducing the pressure on rocks lowers their melting temperature, and that hot mantle rocks will ascend to regions of lower pressure to induce the melting process is known as...

Adding water can lower the melting temperature of mantle rocks and trigger partial melting. This process commonly occurs where?

Which of the following is not a way to generate magma?

What "tool" is used by geologists to determine the order in which minerals crystallize in a magma, based on their melting temperature?

Earlier-formed minerals are denser than the liquid portion of a magma. These minerals sink to the base of the magma chamber. This process is called...

While migrating through the Earth's crust, a magma may incorporate some of the surrounding rock. This process is called...

When two chemically different magmas ascend through the crust, the less dense magma body will overtake the more dense and slower rising one. This process is called...

Secondary magmas can form from a parent magma, and usually do so as the magma begins to cool and crystalize. This process is called...

Most magmas that erupt are ______ magmas. These are frequently the result of melting rocks at an ocean ridge and are called primary (or primitive) magmas.

Magmas that form when mafic magma ponds beneath continental crust are __________ magmas.

A magma that is the result of the differentiation of mantle-derived mafic magmas is a __________ magma.

Identify the type of pluton shown.

Identify the type of pluton shown.

Identify the type of pluton shown.

Another term for a tabular and discordant pluton is...

Another term for a tabular and concordant pluton is...

This process occurs when intrusive igneous rocks cool, shrink, and then fracture to produce pillar like structures with 6 sides.

A suspended block of country rock that can be found INSIDE a pluton is called a...