Three facts about radiometric dating
There is evidence that energy from the Earth's accumulation caused the surface to be molten.
Further, the processes of erosion and crustal recycling have apparently destroyed all of the earliest surface.
When living things die, they stop taking in carbon-14, and the radioactive clock is "set"!
This causes the data points to separate from each other.
The higher the uranium-to-lead ratio of a rock, the more the Pb-206/Pb-204 and Pb-207/Pb-204 values will change with time.
If the solar system formed from a common pool of matter, which was uniformly distributed in terms of Pb isotope ratios, then the initial plots for all objects from that pool of matter would fall on a single point.
Over time, the amounts of Pb-206 and Pb-207 will change in some samples, as these isotopes are decay end-products of uranium decay (U-238 decays to Pb-206, and U-235 decays to Pb-207).
This lower limit is at least concordant with the independently derived figure of 4.55 billion years for the Earth's actual age.
The most direct means for calculating the Earth's age is a Pb/Pb isochron age, derived from samples of the Earth and meteorites.
Radioactive elements are unstable; they breakdown spontaneously into more stable atoms over time, a process known as radioactive decay.
Radioactive decay occurs at a constant rate, specific to each radioactive isotope.
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.
It is founded on unprovable assumptions such as 1) there has been no contamination and 2) the decay rate has remained constant.Tags: Adult Dating, affair dating, sex dating