The moon's youngest rocks are approximately as old as Earth's oldest rocks. Affects from early events that had an impact on both Earth and the moon can now only be observed on the moon. The moon and Earth were made out of the same materials in different proportions. The moon is void of life. No living organisms, fossils or native organic compounds were found.
All moon rocks are basalts, anorthosites or breccias.
Water was not necessary for their formation. An ocean of magma existed on the moon in its earlier years. Remnants of rocks that floated to the ocean's surface are still found on the surface. Asteroid impacts created basins, later filled by lava from the magma ocean. The moon is asymmetrically formed.