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In practice, there are sufficient variations in these conditions that it is necessary to correct a sample’s raw radiocarbon age by comparing it with the standard calibration curve.

Carbon-14 dating depends on the amount of atmospheric carbon-14 relative to carbon-12.

A final assumption is that the various rates of flow of carbon-14 among the respective geophysical reservoirs must be constant, and the residence time of carbon-14 in the various reservoirs must be short relative to its half-life. (Riverside, CA: La Sierra University Press, 1997), 183. Carbon-14 dating models and experimental implications. Origins 24(2, 1997):50-64 [16] The deep ocean waters are estimated to take about 1000 years to circulate back to the surface: Aitken, MJ.

If these three conditions are met, the initial concentration of C in the sample can be estimated.

These effects are corrected for by comparing samples from different locations. C in coal and oil is much less than in the present environment. This gives a ratio of 300:1 for pre-Flood biosphere carbon to present biosphere carbon. If a significant portion of the coal and oil represents organisms that were deposited in a global flood, then the pre-flood atmosphere must have contained much less C over time resulting in wobbles and deviation from expected levels in the standard calibration curve based on samples of known age? [10] Note the wobbles in the curves in Pearson, GW et al. Evidence for correlations between nuclear decay rates and Earth-Sun distance – et al. This differs by a factor of only two from the figure of 143:1 proposed by Brown (Brown, RH. Violations of this assumption can frequently be identified.Three additional assumptions are necessary in radiocarbon dating in order to estimate the initial concentration of C could be caused by changes in the intensity of the cosmic radiation or in the strength of the earth’s magnetic field.

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