Graph showing the Neodynium isotope differences between Oklo samples and normal natural abundance. Atomic weight is shown on the bottom axis, percent abundance along the vertical axis.
| | Graph showing the Neodynium isotope differences between Oklo samples and normal natural abundance. Atomic weight is shown on the bottom axis, percent abundance along the vertical axis. |
Adapted from Cowan's 1976 Scientific American article on Oklo.