Melt
Another name for melted rock above ground
Lava
This rock is made of mostly light colored silicates
Felsic
Another name for fine grained
Aphanitic
Term used to describe an igneous rock based on the minerals it is made of
Composition
Felsic
Another name for melted rock underground
Magma
This rock is made of almost all dark colored minerals
Ultramafic
Another name for coarse grained
Phaneritic
Process when magma or lava cools and forms rocks
Crystallization
What is the composition?
Mafic
Magma is composed of solids, liquids, and _____
Volatiles or gasses
This type of rock is made of mostly dark colored minerals
Mafic
A texture where the rock cooled as gas was escaping
Vesicular
Term used to describe the a rock based on the appearance of the individual crystals
What is the texture?
Glassy
These types of rocks were formed underground
Intrusive
This rock is made of some light and dark colored minerals
Intermediate
The texture of obsidian
Glassy
Tiny voids in a rock that cooled when lava was cooling
Vesicle
What is the texture?
Vesicular
These types of rocks were formed above ground
Extrusive
This rock is the exception to the color rule of compositions. It is made of entirely silicates
Obsidian
This texture reveals that the magma and lava cooled at two different locations
Phaneritic
The large crystal formed in a porphyritic rock
Phenocryst
What is the composition?
Ultramafic