Measured radiocarbon dating organic materials
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.The reference blank consists of more than 50 14C-free plant materials collected from the deep layer of the same core (corresponding to an age of ca. The Lake Suigetsu floating varve chronology consists of 29,100 varves.The sedimentation or annual varve thickness is relatively uniform (typically 1.2 mm yr-1 during the Holocene and 0.62 mm yr-1 during the Glacial)."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.One of the products of the continuing cycles of the seasons can be found on the bottoms of some lakes.
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).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.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!