Journal
RADIOCARBON
Volume 56, Issue 2, Pages 573-579Publisher
UNIV ARIZONA DEPT GEOSCIENCES
DOI: 10.2458/56.17634
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In the best case, radiocarbon measurements allow artificial objects to be dated with a precision of 10 calendar years when conventional wiggle-matching onto the IntCal09 calibration curve is applied. More precise dating can only be achieved by using annually resolved C-14 calibration data, particularly in timespans when there are rapid changes in atmospheric C-14 concentration. The recently observed jump in atmospheric C-14 concentration of 1.5% between AD 774 and 775, though expected to be rare, is a good example for such a rapid change. We demonstrate by example that is possible to precisely C-14 date the cutting year of a timber in the historically important and well-preserved Holy Cross chapel of the convent St. John the Baptist in Val Mustair, Switzerland.
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