It was the case of an 18th-century sloop whose excavation was led in South Carolina (United States) in 1992.
Thus, from the oldest to the youngest, all archaeological sites are likely to be dated by an appropriate method.
Luminescence dating refers to a group of methods of determining how long ago mineral grains were last exposed to sunlight or sufficient heating.
The stratigraphy of an archaeological site can be used to date, or refine the date, of particular activities ("contexts") on that site.
For example, if a context is sealed between two other contexts of known date, it can be inferred that the middle context must date to between those dates.
In addition, because of its particular relation with past human presence or past human activity, archaeology uses almost all the dating methods that it shares with the other sciences, but with some particular variations, like the following: Seriation is a relative dating method (see, above, the list of relative dating methods).
An example of a practical application of seriation, is the comparison of the known style of artefacts such as stone tools or pottery.
The trapped charge accumulates over time at a rate determined by the amount of background radiation at the location where the sample was buried.
Stimulating these mineral grains using either light (blue or green for OSL; infrared for IRSL) or heat (for TL) causes a luminescence signal to be emitted as the stored unstable electron energy is released, the intensity of which varies depending on the amount of radiation absorbed during burial and specific properties of the mineral.Historians, for example, know that Shakespeare's play Henry V was not written before 1587 because Shakespeare's primary source for writing his play was the second edition of Raphael Holinshed's Chronicles, not published until 1587.Thus, 1587 is the post quem dating of Shakespeare's play Henry V.Dating material drawn from the archaeological record can be made by a direct study of an artifact, or may be deduced by association with materials found in the context the item is drawn from or inferred by its point of discovery in the sequence relative to datable contexts.Dating is carried out mainly post excavation, but to support good practice, some preliminary dating work called "spot dating" is usually run in tandem with excavation.Dating is very important in archaeology for constructing models of the past, as it relies on the integrity of dateable objects and samples.