Dating paper

The use of 14C in meteorite dating is solely based on its production by cosmic rays (and for terrestrial samples, with its production in the atmosphere).

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Periods of heavy rain and lots of sunshine will make larger gaps of growth in the rings, while periods of drought might make it difficult to count individual rings. When a given quantity of an isotope is created (in a supernovae, for example), after the half-life has expired, 50% of the parent isotope will have decomposed into daughter isotopes.Increasingly, the other techniques are used, such that probably no one technique dominates for meteorite dating.Rb-Sr is a good example for explaining the process, however.However recent archaeological evidence suggests paper was in use in China two hundred years earlier.In any event China was way ahead of the rest of the world.

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