Geology of the Moon

circular depression in a solid astronomical body formed by the impact of a smaller object

structure and composition of the Moon

thumb|300px|Thorium concentrations on the Moon, as mapped by [[Lunar Prospector. Thorium correlates with the location of KREEP.]] KREEP, an acronym built from the letters K (the atomic symbol for potassium), REE (rare-earth elements) and P (for phosphorus), is a geochemical component of some lunar impact breccia and basaltic rocks. Its most significant feature is somewhat enhanced concentration of a majority of so-called "incompatible" elements (those that are concentrated in the liquid phase during magma crystallization) and the heat-producing elements, namely radioactive uranium, thorium, an

overview of the internal structure of the Moon

method for planetary surface chronology

surface shaking on interstellar bodies in general

according to the giant impact hypothesis, the molten magma that once covered large parts of the Moon as a result of the large amount of energy liberated during the formation of the Moon

lunar impact crater

large area of molten rock on the surface of a planet

seismology