Chapter 5 quiz - Igneous Rocks

According to the figure, what type of rocks can include quartz?

• peridotite

• granite

• gabbro

• basalt

According to the figure, what types of minerals are ultramafic?

• feldspar and biotite

• pyroxine and olivine

• amphibole and pyronene

• feldspar and quartz

According to the map shown in the figure, which area of Earth contains the highest concentrations of quartz and feldspars?

• North America

• the west coast of the U.S.

• the Pacific Ocean

• Hawaii

Granite is an example of __________ rock.

• an extrusive igneous

• a volcanic ash

• an intrusive igneous

• a partially melted

Peridotite and dunite have __________ compositions

• felsic

• mafic

• ultramafic

• intermediate

What branch of Bowen's reaction series cools with a continuous change in composition?

• the iron-magnesium groups

• the carbonates

• the feldspars

• the silica chains

What is an example of an igneous ore deposit?

• metal-rich quartz veins

• placer deposits

• hydrothermal deposits

• porphyritic deposits

What is the last mineral to form on the left branch of Bowen's reaction series?

• pyroxene

• feldspar

• olivine

• quartz

What process explains why a molten magma often is a mix of molten rock and crystals?

• plate tectonics

• melting points

• partial melting

• Bowen's reaction series

Which is not a compositional classification of a magma?

• basaltic

• rhyolitic

• andesitic

• phaneritic