Zircon and radiometric dating Sxce vedio karachi
However, many Christians today accept the teaching of science that life has existed on earth for millions, even billions, of years.
Consider the concordia: as zircons age, they move outward along the curve.The straight line takes the zircons off the concordia. The disturbing event affects the zircons unequally, stripping all the lead from some, only part of it from others and leaving some untouched.The results from these zircons therefore plot along that straight line, establishing what is called a discordia. If a 1500-million-year-old rock is disturbed to create a discordia, then is undisturbed for another billion years, the whole discordia line will migrate along the curve of the concordia, always pointing to the age of the disturbance.Many geologists claim that radiometric “clocks” show rocks to be millions of years old.However, to read any clock accurately we must know where the clock was set at the beginning.
The two cascades are different—235U becomes 207Pb and 238U becomes 206Pb.