Interstellar carbon in meteorites.

@article{Swart1983InterstellarCI,
  title={Interstellar carbon in meteorites.},
  author={Peter Koenraad Swart and Monica M. Grady and Colin T. Pillinger and Roy S. Lewis and Edward B. Anders},
  journal={Science},
  year={1983},
  volume={220 4595},
  pages={406-10}
}
The Murchison and Allende chondrites contain up to 5 parts per million carbon that is enriched in carbon-13 by up to + 1100 per mil (the ratio of carbon-12 to carbon-13 is approximately 42, compared to 88 to 93 for terrestrial carbon). This "heavy" carbon is associated with neon-22 and with anomalous krypton and xenon showing the signature of the s-process… CONTINUE READING