The Moon Guide
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U. S. N. O.
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The phase of the Moon right now

Phase
 
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< Lunar geology

During the bombardment of the Moon, the largest impacts were powerful enough to threw pieces of the Moon out into space. Some of them found themselves in orbit around the Earth, eventually falling to the surface where they can now be  collected as meteorites. In total, around 33 kilograms of lunar rock have been collected in this way! 

The meteorites contain lots of different minerals and rock types, which can teach us about different parts of the Moon, although having said that, some meteorites are identical to others, telling us that they came from the same meteoroid that broke apart in the Earth’s atmosphere as it came down to the surface. It’s impossible to exactly pinpoint the starting point of any given meteorite because such a small number of sites were visited by the Apollo astronauts, so we only know in detail about a handful of locations. It is easy to tell if a meteorite has come from either the mare or the highlands, though, and because mare dominate the near side of the Moon, any meteorites containing mare-like compositions must have come from the near side. 

lunar meteorite
Lunar meteorite SaU 169 as it was
found in Oman

There is only one example where scientists think they have pinpointed a precise location for a lunar meteorite, but there is much controversy surrounding the claim. Meteorite SaU 169, which was found in Oman in 2002, has such a unique composition that some meteorite specialists think it came from an equally unique location on the Moon, a place near the Lalande impact crater near to the Imbrium basin. The meteorite shows evidence of four different impact events, including the formation of the Imbrium basin itself. It was also involved in two more impact events, including the formation of Lalande crater, before being ejected from the lunar surface nearly 10,000 years ago.

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Geologist on the Moon

Lunar geology

Moon rocks on Earth

Moon quakes

How the Moon was formed

Geology of the Moon's features

What is the Moon made of?

Lunar gardening

About impacts

Ray craters

Ageing wrinkles

Meandering channels

 
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