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Bradley L. Jolliff Th measured by the Lunar Prospector mission at the surface representative of the underlying ‘‘bedrock;’ ’ all surfaces covered by old regolith (as opposed to fresh ejecta) are at least slightly contaminated. Dhofar 489 is one of 15 paired lunar-meteorite stones from Oman minary studies showed it to be a feldspathic regolith and feldspathic Apollo samples, in containing clasts of highly magnesian (high Mg/Fe) feldspathic lithologies (Takeda et al., 2003, 2004a,b, 2006). It is also composition-ally distinct in having lower concentrations of incompatible elements than any previously studied lunar meteorite (Kar-ouji et al., 2004; Takeda et al., 2006). We show here tha