Age and compositional data for the newly discovered, paired and differentiated meteorites Graves Nunatak (GRA) 06128 and GRA 06129 are reported. These meteorites are feldspar-rich, with andesite bulk compositions. Their age of 4.52 Gyr demonstrates formation early in Solar System history, and their composition is most consistent with an origin as partial melts from a volatile-rich, oxidized asteroid.
- James M. D. Day
- Richard D. Ash
- Lawrence A. Taylor
