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Clearly, such huge time periods cannot be fitted into the Bible without compromising what the Bible says about the goodness of God and the origin of sin, death and suffering—the reason Jesus came into the world (See Six Days? He said, This only makes sense with a time-line beginning with the creation week thousands of years ago.
Accordingly, carbon dating carefully applied to items from historical times can be useful.
This has led to new field of isotopic tracer investigations of the Earth system using Sr and Nd.
Epsilon notation is used to describe differences from chondritic evolution in 143Nd/144Nd ratio at any specified time, with positive Epsilon meaning radiogenic Nd relative to the contemporaneous chondritic ratio.
This limits the applications of the Sm-Nd radiogenic decay scheme.
Whole-rock and mineral isochrons: preconditions If all uncertainties have been correctly estimated and the preconditions do apply, then all scatter about the line can be accounted for as analytical uncertainty.Overall, the energy of the Earth's magnetic field has been decreasing, so more C is being produced now than in the past.