Abstract
The difference in the xenon-iodine formation intervals for the magnetite samples from the carbonaceous chondrites Orgueil, Murchison and Karoonda is less than 0.7 million years and the chondrites Bjurböle and Arapahoe began to retain xenon a few million years after the magnetites. The isotopic composition of the trapped xenon in these meteorites is identical to that of the carbonaceous chondrite Murray.
