Cation ratio dating

It has many applications including archaeological palynology, Quaternary palynology, and stratigraphic palynology.' There are links to each of these topics.

Frink) 'Because interpretation is so complex, all radiocarbon dates included in an archaeological publication must be presented in a standard manner. Archaeologists must know exactly what is being dated and, in the case of samples from excavations, their precise stratigraphic relationship to the site.A central problem in archaeological research has been the Chronometrie dating of petroglyphs (rock engravings).Recent improvements in the understanding of the chemistry of rock varnish (or patina) that develops on rock surfaces in arid regions has resulted in the development of a calibrated dating technique, cation-ratio (CR) dating.The nature of charcoal and wood samples is very important - twigs or nuts are ideal, because they only contain carbon-14 taken in during a short growing season, whereas the central portion of a large tree will obviously give a date decades (or even centuries) earlier than its use for fuel or construction.' (p.119-21) Calibration program"We are pleased to announce the HTML version of the radiocarbon program CALIB 4.2. Please refer to the on-line CALIB 4.1 manual for details about the calibration datasets and calculations.

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