In particular, the impact of current environmental change on the nature of Earth Surface Processes is hardly predictable.
Our samples are now pre-treated at the University of Canterbury.
Cosmogenic nuclides are isotopes that are produced by interaction of cosmic rays with the nucleus of the atom.
The cosmogenic nuclides measured by AMS at PRIME Lab are radioactive isotopes of the elements beryllium, carbon, aluminum, chlorine, calcium, and iodine.
Because the isotopes we're using have a short half-life, it follows that if a rock has been buried for a few million years the quantities of these isotopes will be negligible.
But when the rock becomes exposed on the surface, and so exposed to cosmic rays, these cosmogenic isotopes will begin to accumulate in the rock.