Radiometric dating summary

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The uranium to lead decay series is marked by a half-life of million years. The fact that dating techniques most often agree with each other is why scientists tend to trust them in the first place. These methods are applicable to materials that are up to aboutyears old. Admittedly, this latter possibility is VERY unlikely. Using these principles, it is possible to construct an interpretation of the sequence of events for any geological situation, even on other planets e. However, rocks and other objects in nature do not give off such obvious clues about how long they have been around. Fossil succession and the geologic time scale are constrained by the observed order of the stratigraphy -- basically geometry -- not by evolutionary theory.

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Information on the independent cross-checks for radiometric dates comes mainly from these sources:

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radiometric dating

The uranium-lead system in its simpler forms, using U, U, and thorium, has proved to be less reliable than many of the other dating systems. In this case, the. There are innumerable independent tests that can identify and resolve inconsistencies in the data. Figure 3. A critique of conventional geologic time scale should address the best and most consistent data available, and explain it with an alternative interpretation, because that is the data that actually matters to the current understanding of geologic time.

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