Conventional vs ams radiocarbon dating
The age below 30.45 m depth is obtained by assuming a constant sedimentation in the Glacial (0.62 mm yr-1).
In order to reconstruct the calendar time scale, we compared the Lake Suigetsu chronology with calibration curves obtained from recently revised absolute German oak and the floating German pine calibration curves (2).
At the bottom of Lake Suigetsu, thin layers of microscopic algae have been piling up for many years.
The alternating layers of dark and light count the years like tree rings.
"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.
To allow detailed observation of the sediments, the well-cleaned surfaces of sediments were scanned with a digital camera.
Also C14 dating affirms Scripture/Scripture affirms C14 dating!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.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.
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Using this match, we defined the absolute time scale for the Lake Suigetsu varves chronology.