The polygonal pattern seen in both the simulations and GRAIL data most likely means that traces of heavier KREEP and ilmenite-rich basalt layers were left behind beneath the surface as those ...

The researchers found that the basalt in the sample was similar to basalt ... Types of materials mixed and formed what has ...

The basalt fragments studied in the Science paper ... Both papers noted that the samples were not rich in KREEP, an acronym that stands for potassium (chemical symbol K), rare-earth elements ...

Initial lead isotope analysis suggests that these basalts derive from distinct mantle sources: The 4.2 Ga basalt came from a KREEP-rich source, i.e., one with abundant potassium (K), rare earth ...