Granite

Definition

Granite is a coarse-grained igneous rock composed mainly of quartz, feldspar, and mica. It forms from the slow crystallization of magma beneath Earth's surface.

5 Must Know Facts For Your Next Test

1. Granite is one of the most abundant rocks in Earth's continental crust.
2. It plays a crucial role in understanding the geological history and structure of Earth.
3. The presence of granite on Earth provides evidence for plate tectonics and the recycling of crustal material.
4. Granite's mineral composition makes it highly resistant to weathering and erosion, contributing to the formation of mountain ranges.
5. In planetary science, studying granite helps scientists compare Earth's geology with other terrestrial planets.

Review Questions

• What are the primary minerals that make up granite?
• How does granite form, and where is it typically found?
• Why is granite significant in understanding Earth's geological history?

Related terms

Igneous Rock: Rocks formed through the cooling and solidification of magma or lava.

Plate Tectonics:

The theory explaining the movement of Earth's lithospheric plates.

Continental Crust: The thick part of Earth's crust that forms the large landmasses.