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There are three main assumptions that must be made to accept radiometric dating methods.
These must be accepted on faith in uniformitarian and naturalistic frameworks.
If certain things are known, it is possible to calculate the amount of time since the parent isotope began to decay.
For example, if you began with 1 gram of carbon-14, after 5,730 years you would be left with 0.50 g and only 0.25 g after 11,460 years.
The textbooks focus on relative dating, based on the layering of the rocks, and radiometric dating.The Bible gives us a much more reliable history of the earth as it was recorded by God.When someone mentions scientific dating methods, the first thing to come to mind for most people is carbon dating.There is also a difference in the timescale used to explain the layers.Determining the relative age of a rock layer is based on the assumption that you know the ages of the rocks surrounding it.