Gilbert

Definition

Gilbert is a prominent lunar impact crater located on the Moon's near side. Named after American geologist Grove Karl Gilbert, it provides insights into the geological history of the Moon's surface.

5 Must Know Facts For Your Next Test

1. Gilbert has a diameter of approximately 108 kilometers.
2. The crater is situated in the southeastern part of the Mare Australe region.
3. Gilbert features a complex structure with terraced walls and a central peak.
4. The crater’s age is estimated to be around 3.9 billion years, placing it in the Nectarian period.
5. It is often used as a reference point for studying impact events and lunar stratigraphy.

Review Questions

• What is the approximate diameter of the Gilbert crater?
• In which region of the Moon can Gilbert be found?
• Why is Gilbert significant for understanding lunar geological history?

Related terms

Impact Crater: A circular depression on a planet or moon caused by the collision with a meteorite or other celestial body.

Nectarian Period: A time span on the Moon from about 3.92 to 3.85 billion years ago, characterized by numerous large impact events.

Central Peak: A mountain or group of mountains that forms at the center of larger impact craters due to rebound of the surface following an impact event.