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The computer program Isoplot was used to plot isochrons and calculate isochron ages from the other radioisotope analyses.

The best isochron plots, where all the variation from the line of best fit to the data incorporates all the analytical errors, yielded an Rb-Sr isochron age of 1240±84 Ma, an Sm-Nd isochron age of 1655±40 Ma, and a Pb-Pb isochron age of 1883±53 Ma.

These were originally basalt lava flows several meters to tens of meters thick.

In some outcrops pillow structures have been preserved, testimony to the basalt lavas having originally erupted and flowed under water onto the Creation Week ocean floor.

Both laboratories use standard, best-practice procedures on state-of-the-art equipment.

The model K-Ar ages for each of the samples ranged from 405.1±10 Ma to 2574.2±73 Ma.

It is also claimed that the original basalt lavas were erupted between 17 Ma, based on U-Pb dating of "original" zircon grains in metamorphosed felsic (granitic) volcanic layers within the Brahma and Rama Schists.

Obviously, if radioisotope decay was accelerated, say during the Genesis Flood, then the radioisotope decay "clocks" could never be relied upon to "date" rocks as many millions of years old.

Most people believe that when the different radioisotope dating methods are used on the same rock unit they all yield the same age.

However, the radioisotope dating of these Grand Canyon rocks clearly demonstrates that the disagreement, or isochron discordance, is pronounced.

Even when the calculated error margins are taken into account the different radioisotope dating methods yield completely different "ages" that cannot be reconciled—1240±84 Ma (Rb-Sr), 1655±40 Ma (Sm-Nd), and 1883±53 Ma (Pb-Pb) (see diagram).

None of the obtained isochron "ages" corresponds to the "date" for any recognized event, neither the original lava eruptions nor the subsequent metamorphism.

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  1. Feb 1, 2010. Sequence Group of conformable layers lying between unconformities. Unconformities are. Beginning in 1911, Arthur Holmes began a long career of applying the concept of radiometric dating to rocks, and is given credit for ironing out the technical issues that hampered earlier attempts. After a century of.

  2. Sep 30, 2014. geological layers of sedimentary rock, exposed along the highway, Salt River Canyon, Arizona Unlike people, you can't really guess the. If a rock has been partially melted, or otherwise metamorphosed, that causes complications for radiometric absolute age dating as well. Like the other kind of dating.

  3. Jan 6, 2011. The textbooks focus on relative dating, based on the layering of the rocks, and radiometric dating. Relative ages are assigned to rocks based on the idea that rock layers lower in the strata were deposited before rock layers that are higher. Creationists do not necessarily disagree with this concept, but it can.

  4. Radiometric dating is used to estimate the age of rocks and other objects based on the fixed decay rate of radioactive isotopes. Learn about half-life and how it is used in different dating methods, such as uranium-lead dating and radiocarbon dating, in this video lesson.

  5. Jul 17, 2012. The layers of volcanic rock are extremely important to reconstructing the history of the Turkana Basin because they allow scientists to calculate the age of hominin fossils found in the region. The volcanic material in tuff is well-suited for radiometric dating, which uses known decay rates for specific unstable.

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