Radiometric dating answers com

Carbon-14 decays almost completely within 100,000 years of the organism dying, and many fossils and rock strata are hundreds of times older than that.To date older fossils, other methods are used, such as potassium-argon or argon-argon dating.The half-life , specific to each nuclide, can be accurately measured on a pure sample, and is known to be independent of the chemical composition of the sample, temperature and pressure.Through analysis, a bone fragment is determined to contain 13% of its original carbon-14.The three basic types of rocks are igneous, sedimentary, and metamorphic. Sedimentary rocks are types of rock that are formed by the deposition of material at the Earth's surface and within bodies of…

The key is to measure an isotope that has had time to decay a measurable amount, but not so much as to only leave a trace remaining.The half-life of carbon-14 is approximately 5,730 years. Since the quantity represents 13% (or 13/100ths) of , it follows that This is based on the decay of rubidium isotopes to strontium isotopes, and can be used to date rocks or to relate organisms to the rocks on which they formed.It suffers from the problem that rubidium and strontium are very mobile and may easily enter rocks at a much later date to that of formation.YEC biblical literalists are necessarily bound to the dogmatic religious conclusion that the Earth is of a certain age based on a particular literal interpretation of the Genesis creation myth.They tie themselves in logical knots trying to reconcile the results of radiometric dating with the unwavering belief that the Earth was created ex nihilo about 6,000 to 10,000 years ago.

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