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Users may wish to round ranges to the nearest decade or century depending on the scale of the total range and the sample standard deviation. In the examples below, the cal age ranges are reported to the nearest year. However, it may be more appropriate to round the cal age ranges to the nearest 10 years for samples with standard deviations ( ± error in the age) greater than 50 years. The cal ages may be reported as follows:
| Sample | 14C age yr BP | 95.4 % (2s) cal age ranges | relative area under distribution | calibration data |
|---|---|---|---|---|
| test2 | 3650±50 | cal BP 4142-4128 | 0.02 | (Reimer et al, 2004) |
| cal BP 4092-3842 | 0.98 |
Alternatively, the extremes of the 1 sigma or 2 sigma ranges may be given. For instance, in the above example the 2 sigma ranges could be reported as cal BP 4142-3842 and the probability would be implied. In all cases, one should report the radiocarbon age with standard error, the calibration dataset used, and any special options used such as a moving average of the curve or the percent marine carbon for the mixed curve. The program should be referenced as Stuiver and Reimer, 1993 (version 5.0) and the calibration dataset as found on the results output (e.g. Hughen et al., 2004) Complete references are found in the References
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