Earlier observation of very low noble-gas ages for Seres, which is inconsistent with its saturation activity...trapped Kr and Xe in these chondrites, excepting Seres, are very similar to compositions determined earlier...earlier for ordinary chondrites. The Xe in Seres is enriched in light isotopes and is similar to solar...similar meteorites having longer ages. The last meteorite, Seres, showed a nominal “Ne, The 3He or 21Ne method...production an age > 2 x lo6 y. However, this meteorite had sufrate of 3He, and ‘lNec (subscript c represents |