Calibration curve for short-lived samples, 1900-3900 BC

Abstract

Both the Pretoria and the Groningen radiocarbon laboratories performed high-precision analyses on 1-4 annual tree-ring samples made available by Bernd Becker from his South German oak dendrochronological series. For the range, 1900-3350 BC, the Pretoria dates average 2.9±1.8 yr younger than the Seattle dates. In addition to demonstrating compatibility, this analysis shows that little detail is sacrificed by using 10 annual tree rings per sample, as was done in the Seattle laboratory. -from Authors