Chapter 26.2 Flashcards
Define rock
A rock naturally formed mixture containing minerals, rock fragments, & volcanic glass.
How are rocks identified?
Rocks are identified by their composition & texture.
What does the texture of a rock describe about a rock?
The texture of the rock describes the size, shape, & arrangement of the rock’s components.
Where do the intrusive igneous rock form?
Intrusive igneous rock forms from molten rock material that cools & crystallizes either underground or on Earth’s surface.
What type of molten rock does intrusive igneous form from?
Igneous rock forms from within Earth’s crust called intrusive igneous rocks.
What is the name of the series that illustrates simultaneous crystallization of silicate minerals?
Magma composition
What are the 3 types of magma?
The 3 types of magma are basaltic, anseditic, & rhyolitic.
Which magma type has a low silica content?
Mafic magma
Which magma type has a high silica content?
Felsic magma
Which type of crust has an abundant amount of quartz?
Continental
Which type of crust has little to no quartz?
Oceanic
Which type of igneous rock has a coarse grained texture?
Phaneritic rock
Which type of igneous rock has a fine grained texture?
Extrusive igneous rocks.
Do fine grained rocks cool slowly or quickly?
Fine grained rocks cool quickly.
What are the 2 specific texture types for extrusive igneous rock?
Extrusive rocks can exhibit other textures.
