Igneous Rocks

Front

What is an igneous rock?

Back

An igneous rock is a type of rock that forms from the solidification of magma or lava.

Front

What are the two main types of igneous rocks?

Back

The two main types of igneous rocks are intrusive (plutonic) and extrusive (volcanic).

Front

Where does magma form?

Back

Magma forms below the Earth's surface in the mantle or crust.

Front

What is the difference between magma and lava?

Back

Magma is molten rock beneath the Earth's surface, while lava is magma that has reached the surface.

Front

What is the texture of an igneous rock with a grain size less than 1 mm?

Back

The texture is typically fine-grained.

Front

What is the texture of an igneous rock with a grain size between 1-10 mm?

Back

The texture is typically coarse-grained.

Front

What does 'felsic' mean in terms of igneous rock composition?

Back

'Felsic' refers to igneous rocks that are rich in silica and light-colored minerals.

Front

What does 'mafic' mean in terms of igneous rock composition?

Back

'Mafic' refers to igneous rocks that are rich in magnesium and iron and are typically darker in color.

Front

What is an example of an intrusive igneous rock?

Back

Granite is an example of an intrusive igneous rock.

Front

What is an example of an extrusive igneous rock?

Back

Basalt is an example of an extrusive igneous rock.