Exploring Igneous Rocks and Textures

Front

What is an igneous rock?

Back

An igneous rock is formed from the solidification of molten rock material (magma or lava).

Front

What are the two main types of igneous rocks?

Back

Intrusive (plutonic) and extrusive (volcanic) igneous rocks.

Front

What is the difference between intrusive and extrusive igneous rocks?

Back

Intrusive rocks form below the Earth's surface, while extrusive rocks form on the surface.

Front

What texture do porphyritic igneous rocks have?

Back

Porphyritic rocks have both large and small crystals.

Front

What is a batholith?

Back

A batholith is a large, deep-seated intrusive body of igneous rock.

Front

What is obsidian?

Back

Obsidian is an igneous rock characterized by a glassy texture.

Front

What is the primary mineral composition of granite?

Back

Granite is primarily composed of quartz, K-feldspar, and plagioclase feldspar.

Front

What is a dike in geology?

Back

A dike is a type of intrusive igneous rock that cuts across existing rock layers.

Front

What is the texture of basalt?

Back

Basalt typically has a fine-grained texture due to rapid cooling of lava.

Front

What is pumice?

Back

Pumice is a light, porous volcanic rock that forms when lava cools quickly and traps gas bubbles.