Sayh al Uhaymir
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Sayh al Uhamir is a meteorite found in the Sayh al Uhaymir region of Oman, originating from the Moon. It collided with the Earth 9.7 ± 1.3 kya.
It is complete, a light gray-greenish rounded stone, dimensions 70x43x40mm and mass 206 grams, found on January 16, 2002, in the central desert of Oman at 20° 34.391'N and 57° 19.400' E.
According to geologist Edwin Gnos and coworkers, the meteorite's origin can be pinpointed to the vicinity of the Lalande impact crater; isotopic analysis shows a complex history of four distinct lunar impacts: "Crystallization of the impact melt occurred at 3909 ± 13 Ma, followed by exhumation by a second impact at 2800 Ma, which raised the sample to a regolith position at unconstrained depth. A third impact at 200 Ma moved the material closer to the lunar surface, where it mixed with solar-wind–containing regolith. It was launched into space by a fourth impact at <0.34 Ma" (Science 2004, vol 305, pp657-9, July 2004).