Igneous Rock Flashcard

Front

What are igneous rocks formed from?

Back

Igneous rocks are formed from magma and lava.

Front

What is a felsic, extrusive glassy igneous rock that is frothy due to many vesicles?

Back

Pumice.

Front

What category of igneous rock has mineral crystals that are large enough to identify without a microscope?

Back

Phaneritic/intrusive.

Front

According to Bowen's reaction series, which mineral forms at the hottest temperature?

Back

Olivine.

Front

What is the name of an igneous rock that partially forms inside the Earth then abruptly erupts?

Back

Porphyry.

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 igneous rocks form inside the Earth, while extrusive igneous rocks form on the Earth's surface.

Front

What is the texture of igneous rocks that cool quickly on the surface?

Back

Aphanitic texture.

Front

What is the texture of igneous rocks that cool slowly underground?

Back

Phaneritic texture.

Front

What is the significance of vesicles in igneous rocks?

Back

Vesicles are gas bubbles that form in lava as it cools, indicating rapid cooling.