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Chronological dating, or simply dating, is the process of attributing to an object or event a date in the past, allowing such object or event to be located in a previously established chronology.
This usually requires what is commonly known as a "dating method".
In the chapter on Fossils, we will discover that dating rocks by their fossils is based on circular reasoning:  Each strata is a certain age because of certain key fossils in it;  the fossils in the strata are a certain age because evolutionary theory says they should be that certain age, and also because they are in rock strata which is that same age.
Thus, fossil-strata dating methods are hopelessly foundered.
This statement is possibly surprising in view of the fact that almost any modern writer can produce a geologic timetable [based on evolutionary theory applied to "index fossils") that gives precise datings and lengths of the eras and systems and even of some of the smaller subdivisions . These figures have been obtained in various remarkable ways. ]"Ultimately, however, they are tied to three [radioactive] dates based on atomic disintegration: (1) 60 million years, the age of the pitchblende at Central City, Colorado; (2) 220 million years, the age of the pitchblende at St.
Joachimstal, Bohemia; and (3) 440 million years, the age of the uranium-bearing shale at Gullhogen, Sweden.
In other words, the change in numbers of atoms follows a geometric scale as illustrated by the graph below.other carbon isotopes in the same ratio as exists in the atmosphere.
Geochronologists do not claim that radiometric dating is foolproof (no scientific method is), but it does work reliably for most samples.
It is these highly consistent and reliable samples, rather than the tricky ones, that have to be falsified for "young Earth" theories to have any scientific plausibility, not to mention the need to falsify huge amounts of evidence from other techniques.
his document discusses the way radiometric dating and stratigraphic principles are used to establish the conventional geological time scale.
It is not about the theory behind radiometric dating methods, it is about their , and it therefore assumes the reader has some familiarity with the technique already (refer to "Other Sources" for more information).