Detailed comparison with short piston cores shows that the sampling does not cause significant loss of varves - typically 0-2 cm to a maximum of 3 cm, corresponding to ca. 20,000 cal BP) were estimated by varve counting of a single core, the ages quoted should be considered as minimum ages, the error increasing with depth.
Based on the results of some duplicated countings of selected subsamples and independent counting of different subsamples collected from the same horizon, we estimate that the counting error is less than 1.5%, corresponding to 150 yr for 10,000 varve years.
"In order to build up a calendar time scale (i.e., varve chronology) for the Suigetsu (SG) core, a total of 85 subsamples were taken in a section of SG extending from 10.43 to 30.34 m below the top sediment, each ca.
25 cm in length, including a 1.5 cm overlap with neighbouring subsamples.
The sedimentation or annual varve thickness is relatively uniform, typically 1.2 mm per yr for present conditions in Lake Suigetsu which is located near the coast of the Sea of Japan.
Recently scientists took a 75-m long continuous core from the center of the lake for close analysis including AMS 14C measurements on more than 250 terrestrial macrofossil samples of the annual laminated sediments.
Continuous lines show the German oak and pine chronologies fixed by comparison with the varve chronology of Lake Suigetsu.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.Also the data seems to indicate no more that a 16.7 percent error due to deviation of C14 in the atmosphere for the past 40,000 years. plus or minus 627 years, a plus or minus 5.7 percent error range.The above Table 2 from Palaeo 122(1996)p.114 summarizes published data concerning one proposed event, the termination of the Younger Dryas period, and illustrates the range of dating errors from various sources including tree rings, lake varves, coral dating and the Greenland ice cores. Conclusion: The apparent close correlation of the dating results from multiple sources appears to be strong evidence for an earth much older than 10,000 years!At the extremes there is a range from 10,447 to 11,700 year B. And evidence that properly conducted C14 radiometric dating can approach reasonable accuracy, possibly within better than 10 percent.Also C14 dating affirms Scripture/Scripture affirms C14 dating!The combined 14C and varve chronologies from Lake Suigetsu are used to calibrate the 14C time scale beyond the range of the absolute tree-ring calibration.Figure 2 shows an atmospheric 14C calibration for the complete 14C dating range (less than 45 ka). Atmospheric radiocarbon calibration for almost the complete 14C dating range (less than 45 ka cal BP) reconstructed from annually laiminated sediments from Lake Suigetsu (Japan).Most information on the past 30,000 years or so is from sites or specimens that have been dated using radiocarbon (14C).However, the radiocarbon age scale that would be calculated from first principles (based on the decay rate of the 14C isotope, assuming that 14C was at the same level of abundance as it is at present) is not always reliable, because there have been fluctuations in the rate of production in 14C at the top of the atmosphere.