Igneous Rock Classification and Characteristics Quiz

Test your knowledge on igneous rock classification, textures, minerals, and formation with these petrology quiz questions.

#1

Which of the following is an example of an intrusive igneous rock?

Basalt
Granite
Pumice
Andesite
2 answered
#2

What is the primary mineral in granite, a common intrusive igneous rock?

Quartz
Feldspar
Mica
Calcite
2 answered
#3

Which of the following is an example of an intermediate igneous rock?

Gabbro
Andesite
Rhyolite
Peridotite
2 answered
#4

What is the primary mineral in peridotite, a common ultramafic rock?

Quartz
Feldspar
Olivine
Hornblende
2 answered
#5

Which mineral is commonly found in both basalt and gabbro?

Quartz
Feldspar
Olivine
Mica
2 answered
#6

What is the main factor that determines the texture of an igneous rock?

Mineral composition
Grain size
Color
Hardness
2 answered
#7

Which type of magma is associated with explosive volcanic eruptions?

Basaltic magma
Andesitic magma
Rhyolitic magma
Ultramafic magma
2 answered
#8

Which igneous rock is known for its vesicular texture and is often associated with explosive volcanic activity?

Pumice
Andesite
Basalt
Rhyolite
2 answered
#9

What is the primary difference between plutonic and volcanic rocks?

Color
Texture
Mineral composition
Formation location
2 answered
#10

What is the primary mineral in basalt, a common extrusive igneous rock?

Quartz
Feldspar
Olivine
Mica
2 answered
#11

Which type of volcanic rock is often associated with pillow lavas and underwater eruptions?

Andesite
Pumice
Basalt
Rhyolite
2 answered
#12

What is the characteristic mineral of peridotite, a common ultramafic rock?

Quartz
Feldspar
Olivine
Hornblende
2 answered
#13

Which igneous rock is formed from the rapid cooling of lava and often has a glassy texture?

Obsidian
Diorite
Gabbro
Phyllite
2 answered
#14

Which classification system is commonly used for naming and identifying igneous rocks based on mineral composition?

Stratigraphy
Mohs Scale
Bowen's Reaction Series
QAPF diagram
2 answered
#15

What is the term for a large, discordant body of intrusive igneous rock that cuts across existing rock layers?

Batholith
Dike
Sill
Laccolith
2 answered
#16

What is the term for the fine-grained equivalent of granite?

Diorite
Rhyolite
Granodiorite
Syenite
2 answered
#17

Which mineral is commonly found in both granite and rhyolite?

Quartz
Olivine
Pyroxene
Plagioclase Feldspar
2 answered

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