Kreep basalt main content.

Kreep basalt

Part of Hall of Meteorites.

D.4.2.3. Kreep basalt hero.jpg

Exhibition Text

Another type of mare basalt, this moon rock is of a particular type called KREEP. Such rocks are rich in potassium (represented by K in the periodic table of elements), rare earth elements (REE) and phosphorous (P). As the magma ocean solidified, these KREEP components remained in the molten portion, becoming more concentrated. This heavier KREEP magma sank to the lower crust, where it solidified, until it was melted by rising basalt lava.

Collection Information


Apollo 14

NASA 60015

For Educators

Topic: Astronomy

Subtopic: Planets

Keywords: Meteorites, Astrophysics, Rare earth metals, Potassium, Basalt, Magmas, Astrogeology, Lunar geology, Phosphorus

Audience: General