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The 'Wk' prefix shown here indicates that these samples were processed at the University of Waikato Radiocarbon Dating Laboratory.

The site number identifies the specific archaeological site the sample came from.

Calibrated radiocarbon dates are presented using the 2-sigma values which account for 95.4% of the probability of the date falling within that particular range.

All samples are calibrated using CALIB4.4 -the atmospheric terrestrial calibration curve of Stuiver et al. for the MR1 samples, both the atmospheric and marine calibration results are presented.

The New Zealand numbers are part of the New Zealand Archaeological Association Site Recording Scheme.

Site numbers in the United States are based on the "Smithsonian Trinomial System" where each State has its own number (e.g., WA=45), the County within the state has a two letter abbreviation (e.g., Crook County = CR), and sites within the county are given numbers consecutively as they are found and recorded (i.e., 45xxnnn).

Effective November 20, 2014, samples should be sent to the following address: Beta實驗室台北代理處 105台北市松山區敦化北路170號2樓A室 2/F-A, Hung Tai Centre, 170 Dunhua North Road, Songshan ... You only need to include the confirmation code in the packag​e​​.

Read More Published on November 3, 2014 Please be advised that our Miami radiocarbon lab and London forwarding facility will be closed during these periods (all dates inclusive): * Miami lab (USA) - November 27-30, 2014; December 24-28, 2014; and on January 1, 2015 * ...

Therefore, archaeologists have tested charcoal/shell pairs and dated historically recovered shell samples to determine what the local reservoir effects may be.The bulk of the woody material was dated, and one of the largest fragments, AA-40741 (GU-9186A), was separately dated by AMS.There is a difference between the two results but given the uncertainties associated with the sample, the magnitude of the difference is not too unreasonable.In order to compensate for these fluctuations, conventional radiocarbon ages need to be adjusted using a calibration curve.Fortunately, there are a number of computer programs that can perform this task.

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