Books about radiocarbon dating
If this is not the case, it is sometimes possible to correct for the fact; in other cases it makes dating impossible.
For example, marine carbon behaves quite differently from carbon in the terrestrial cycle.
Given a latitude and longitude, an appropriate correction to the date is supplied by the Marine Reservoir Database.
After about 60,000 years the quantity will be too small for our instruments to measure accurately, and the best we'll be able to say is that the sample is about 60,000 years old or more.Such dates typically agree to within 1 or 2 per cent.Although the radiocarbon dates agree closely with dendrochronology, they do not agree exactly.The testing of thermonuclear weapons produced an increase in atmospheric C they contain is infinitesimal.Fortunately it is rarely necessary to use radiocarbon methods to date very recent samples.