Accuracy of radiocarbon dating dating someone with depression yahoo
Scientists insist that Earth is 4.6 billion years old C14 dating was being discussed at a symposium on the prehistory of the Nile Valley.
A famous American colleague, Professor Brew, briefly summarized a common attitude among archaeologists towards it, as follows:"If a C14 date supports our theories, we put it in the main text.
Young earth creationists therefore claim that radiometric dating methods are not reliable and can therefore not be used to disprove Biblical chronology.
Although radiometric dating methods are widely quoted by scientists, they are inappropriate for aging the entire universe due to likely variations in decay rates.
Carbon dating, with its much lower maximum theoretical range, is often used for dating items only hundreds and thousands of years old, so can be calibrated in its lower ranges by comparing results with artifacts who's ages are known from historical records.
Scientists have also attempted to extend the calibration range by comparing results to timber which has its age calculated by dendrochronology, but this has also been questioned because carbon dating is used to assist with working out dendrochronological ages.
For example, with Uranium-lead dating with the crystallization of magma, this remains a closed system until the uranium decays.As it decays, it disrupts the crystal and allows the lead atom to move.Likewise, heating the rock such as granite forms gneiss or basalt forms schist.This can also disrupt the ratios of lead and uranium in the sample.In order to calibrate radiometric dating methods, the methods need to be checked for accuracy against items with independently-known dates.