Osl dating method
If you know X, and you can measure A and B, then it is easy to find C.
The problem is you have to assume X is a constant to determine C.
Fossils are usually dated by the layer they are found in (Biostratigraphy), and the layer is dated by the index fossil they contain.
This is known as the logical fallacy of begging the question (or circular reasoning) because the age of the layer/fossil is assumed before it is dated.
This indicates these zircons must be 4,000 – 14,000 years old and not billions of years old like the Sr in the rock increases. Several samples from the same rock formation are taken and the ratios are plotted. Scientists generally thought the top layer was only a million years old but the Rb-Sr method failed to produce the correct results.
samarium-neodymium dating uses the same basic method as rubidium-strontium dating the same defects also apply.
This is the basis of the entire geological column we have today.Carbon-14 to Nitrogen-14 - Potassium-40 to Argon-40 - Uranium-238 to Lead-206 - Rubidium-87 to Strontium-87 - Samarium-147 to Neodymium-143 - Biostratigraphy - Cosmogenic Nuclide Dating - Palaeomagnetism - Optically Stimulated Luminescence - Thermoluminescence Dating Evolutionary dating methods are often unreliable and inconsistent.Blind experiments have revealed that if the age of a fossil is known, then radiometric dating does not work.Biostratigraphy is the primary way that all fossils are dated.If radiometric or other dating methods do not give the correct date they are discarded, and the fossil is dated based off of what layer it is in.