Igneous Rock Identification and Characteristics

Front

What is a rock with pyroclastic texture?

Back

Tuff is a rock formed from volcanic ash and debris that has been compacted together.

Front

What is the intrusive rock of the basalt family?

Back

Gabbro is an intrusive igneous rock that is chemically equivalent to basalt.

Front

What is an intrusive rock that looks like granite but doesn't have any quartz?

Back

Syenite is an intrusive igneous rock that is similar to granite but lacks quartz.

Front

What is a felsic rock with intrusive texture?

Back

Granite is a common felsic intrusive igneous rock composed mainly of quartz and feldspar.

Front

What is an ultramafic rock that is dark green and rich in olivine and pyroxene?

Back

Peridotite is an ultramafic rock that contains a high percentage of olivine and pyroxene.

Front

Define igneous rock.

Back

Igneous rock is formed through the cooling and solidification of magma or lava.

Front

What is the difference between intrusive and extrusive igneous rocks?

Back

Intrusive rocks form from magma that cools slowly beneath the Earth's surface, while extrusive rocks form from lava that cools quickly on the surface.

Front

What is the texture of a rock that cools quickly?

Back

Arock that cools quickly typically has a fine-grained texture due to rapid crystallization.

Front

What is the primary mineral composition of basalt?

Back

Basalt is primarily composed of plagioclase feldspar and pyroxene.

Front

What is the significance of the term 'felsic'?

Back

Felsic refers to igneous rocks that are rich in lighter-colored minerals such as quartz and feldspar.