Martian meteorites

Definition

Martian meteorites are fragments of rock ejected from the surface of Mars that have landed on Earth. They provide valuable insights into the geological history and composition of Mars.

5 Must Know Facts For Your Next Test

1. Martian meteorites are identified by their unique isotopic compositions which match measurements taken by Mars missions.
2. There are around 300 known Martian meteorites, classified into different types such as shergottites, nakhlites, and chassignites.
3. These meteorites provide evidence of volcanic activity on Mars, with some being as young as 180 million years old.
4. Martian meteorites can contain trapped gases that match the Martian atmosphere, confirming their origin.
5. Analysis of these meteorites has revealed information about water presence on Mars and past habitable conditions.

Related terms

Shergottite: A type of Martian basaltic rock formed from volcanic activity.

Nakhlite: A type of igneous rock from Mars believed to have crystallized from magma around 1.3 billion years ago.

Chassignite: A rare type of Martian meteorite consisting mainly of olivine and orthopyroxene minerals.