Carbon dating on
The SUERC results showed a 95% probability that the bone samples dated from around AD1430-1460, and over in Oxford the results both came out at around AD1412-1449, again with a 95% confidence. Radiocarbon dating of marine organisms can be out by up to several hundred years, and this effect can occur to a lesser degree in terrestrial life where sea-food forms part of the diet.
The mass spectrometry of the Greyfriars bone samples reveals that the individual in question had a high-protein diet including a significant proportion of seafood.
If a fossil is found between two layers of rock whose ages are known, the fossil's age is thought to be between those two known ages.
In 1946, Libby proposed this groundbreaking idea in the journal Physical Review.The small pieces of bone were combusted to produce carbon dioxide which was then put through a mass spectrometer.Testing two pieces each at two different facilities should provide consistent results – and indeed it did. The proportion of C-14 in the atmosphere, and hence in living things, is not constant but varies over the centuries, and it also varies between the atmosphere and the oceans.How old are the bones found under the Greyfriars church?Clearly they can’t be any more recent than the Dissolution of 1538.
There are several different methods for estimating the ages of fossils, including: Paleontologists rely on stratigraphy to date fossils.