Highlands

Definition

Highlands are elevated regions on the lunar surface, characterized by rugged terrain and a high density of impact craters. They are typically older than the lunar maria and have a bright appearance due to their composition of anorthosite rocks.

5 Must Know Facts For Your Next Test

1. The highlands make up about 83% of the Moon's surface.
2. They are heavily cratered, indicating they are among the oldest regions on the Moon.
3. Highlands are primarily composed of anorthosite, which gives them a lighter color compared to the darker maria.
4. These regions contain some of the oldest rocks in the Solar System, dating back over 4 billion years.
5. The South Pole-Aitken Basin is one of the largest and oldest impact structures located within the highlands.

Review Questions

• What percentage of the Moon's surface is covered by highlands?
• Why do highlands appear brighter than lunar maria?
• What type of rock predominantly composes the lunar highlands?

Related terms

Maria:

Large, dark plains on the Moon formed by ancient volcanic eruptions.

Impact Crater:

A depression formed when a meteoroid, asteroid, or comet strikes a planetary surface.

Anorthosite:

A type of intrusive igneous rock predominantly found in lunar highlands.