More recently, accelerator mass spectrometry (AMS) has become widely available.
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This may be the result of growth age; in which the age of dead wood in the centre of the living tree is dated, or storage age; which refers to the amount of time elapsed from the death of the tree to its use by people (Mc Fadgen, 1982).
Many of these records provide links to documents available in open access.These materials are the most widely used material in radiocarbon dating.Since the inception of the technique in the 1950s, charcoal has been acknowledged as a most reliable material for dating (Libby, 1955).Following the theoretical insights of Dean (1978), this paper sets forth principles and procedures for relating radiocarbon dates to cultural events.Emphasis is placed on identifying and taking into account the formation processes of (1) the dated specimens and (2) the deposits that yielded them.