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Rock Textures
Definitions
Rock Identification
Rock Color
Other
100
What texture do rocks composed of large crystal grains have?
Coarse-Grained Igneous Rocks
100
This type of rock forms when molten rock cools and becomes a solid.
Igneous Rock
100
What is a rock formed from the cooling and solidification of magma beneath Earth's surface?
Intrusive Igneous Rocks
100

Dark colored igneous rocks are which?

Low in silica

100
Lava that cools quickly will form extrusive igneous rocks that have (large crystals/small crystals).
What are small crystals?
200
What texture do many extrusive igneous rock that are composed of small crystal grains that cannot be seen by the unaided eye have?
Fine-Grained Igneous Rocks
200
Molten rock on Earth's surface is called______.
What is lava?
200
What is a rock that forms from the cooling and solidification of lava at Earth's surface?
Extrusive Igneous Rock
200

Light colored igneous rocks are which?

High in silica

200
Magma that cools slowly will form intrusive igneous rocks that have (large crystals/small crystals).
What are large crystals?
300
What is the rapid cooling process that produces a rock full of gas pockets called?
Vesicular
300
Molten rock beneath Earth's surface is called ______.
Magma
300
A fine grained, dark, extrusive igneous rock.
What is Basalt or Diabase?
300

Diorite has both light and dark colors in it and will have what type of composition?

Both high and low silica

300
A rock with small crystals would be an (intrusive/extrusive)igneous rock.
EXTRUSIVE
400
Igneous rocks that cool super fast, and have no crystals have what kind of texture?
Glassy
400

Give the name of a rock that is rich in silicon and aluminum and that is generally light in color?

Granite

400
This rock is light in color, extrusive, and vesicular and does not form crystals
What is Pumice?
400

Igneous rocks often contain this mineral

Silica

400
A rock with large crystals would be an (intrusive/extrusive)igneous rock.
INTRUSIVE
500

This rock appears to be black, is low in silica and has a glassy texture.

Obsidian

500

Give the name of a rock rich in magnesium and iron and that is generally dark in color?

Basalt

500
This Rock's mineral composition includes only Pyroxene and Olivine.
What is Peridotite?
500

Basalt is a dark colored rock so what would its silica content be. 

Low

500
Granite, rhyolite, and pumice have the same composition, but look very different because_____________________ ______________________.
Granite: intrusive igneous rock, slow cooling time produced large crystals Rhyolite:began cooling within Earth producing large/medium sized crystals and then rose to the surface and cooled quickly producing small crystals (extrusive) Pumice:extrusive igneous rock, fast cooling time produced small crystals