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The tree-ring calibration range, our calibration agrees well with the European sediments (3) and generally with marine calibrations obtained by combined U/Th and 14C dating of corals (4,5). with 1-p bars = Lake Suigetsu, , ~ and O correspond to U-series based 14C calibration on corals." The results from just one source could possibly be readily contested, but in this case the scientists have correlated the results from multiple sources including that of Lake Gosciaz (Poland), German oak and pine tree ring chronologies and also calibrations from coral data.Many in the scientific community are proposing the result of the above study as a "calibration" to radiometric C14 data, see Appendix A.Using this match, we defined the absolute time scale for the Lake Suigetsu varves chronology.The 29,100 yr Lake Suigetsu chronology then covers the absolute age range from 8830 to 37,930 cal BP. Matching of the 29,100-yr long floating varve chronology from Lake Suigetsu to the absolute chronology.
The rest of the year, dark clay sediments settle on the bottom.Figure PE-4 shows the best match between the tree-ring and the Lake Suigetsu chronologies, estimated by minimizing the weighted sum of squared differences between the 14C ages of macrofossils and the tree-ring calibration curve.