K-Ar dating calculation (video) | Khan Academy K-Ar dating calculation (video) | Khan Academy

Radiometric dating k ar, a response to “scientific” creationism

It could determine whether one should accept simple parent-to-daughter K-Ar ratios or whether some treatment needs to be applied first to get better ages. The discovery of radioactivity also had another side effect, although it was several more decades before its additional significance to geology became apparent and the techniques became refined.

It seems reasonable that gas would collect at the top of these chambers, causing artificially high K-Ar radiometric ages there. I would like to know what is the exact or approximate information content of this assertion, and whether it could be or has been tested statistically.

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Furthermore, some elements in the earth are too abundant to be explained by radioactive decay in 4. This verifies what I said about almost all of the dates used to define correct ages for geologic periods being K-Ar dates.

One example is the rocks from the Kaupelehu Flow, Hualalai Volcano in Hawaii which was known to have erupted in Finally, the overwhelming majority of measurements on the fossil bearing geologic column are all done using one method, the K-Ar method.

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These geological principles are not assumptions either. No matter what the geologic situation, these basic principles reliably yield a reconstructed history of the sequence of events, both depositional, erosional, deformational, and others, for the geology of a region.

Initial 87Sr There is really no valid way of determining what the initial amounts of Sr87 Mweb dating buzz rocks were.

The following quote is from the article by Robert H.

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Woodmorappe does not mention that the experiments in this study were designed such that the anomalous results were evident, the cause of the anomalous results was discovered, and the crystallization ages of the Liberian dikes were unambiguously determined.

Even super isochrons can yield ages that are too old, due to mixings, however. Argon—argon dating has the advantage of not requiring determinations of potassium.

I believe that life was recently created.

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Why is zircon the preferred mineral for obtainting U - Pb dates? Second, there have been sufficient tests to show that during their formation in the crust, igneous and metamorphic rocks nearly always release their entrapped 40Ar, thus resetting the K-Ar clock.

It can, and has been, tested in innumerable ways since the 19th century, in some cases by physically tracing distinct units laterally for hundreds or thousands of kilometres and looking very carefully to see if the order of events changes. Suppose X is a parent substance, Y is its daughter, and Z is a non-radiogenic isotope of the daughter.

The reconstructed history of events forms a "relative time scale", because it is possible to tell that event A occurred prior to event B, which occurred prior to event C, regardless of the actual duration of time between them.

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Furthermore, it is at least possible that anomalies are under-reported in the literature. It has been suggested that free neutrons could transform Pb first to Pb and then to Pb, thus tending to reset the clocks and throw thorium-lead and uranium-lead clocks completely off, even to the point of wiping out geological time.

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An amount of 40Ar equivalent to all the 40Ar now in the atmosphere could be generated in 4. The time scale is refined to reflect the relatively few and progressively smaller inconsistencies that are found.

Another point to note is that even after it cools, the lava or magma may still have many cracks in it, permitting argon to flow. It sometimes seems that reasons can always be found for bad dates, especially on the geologic column.

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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.

Also, Dalrymple says essentially nothing about the phanerozoic, and thus gives little evidence of the accuracy of the conventional dating scheme on fossil-bearing rocks.

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Now, the problem with this is that this excess argon 40 will probably be deposited as single atoms of argon distributed evenly within the sample. We can also consider the average abundance of argon in the crust. But it's not evident how much support this gives to radiometric dating.

Many dates give values near the accepted ones.

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Thus we can get an apparent correlation of different methods without much of a real correlation in nature. The most common rocks observed in this form are sedimentary rocks derived from what were formerly sedimentsand extrusive igneous rocks e.

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In addition, scientists typically design their experiments so that anomalous results, such as might be caused by the rare case of initial 40Ar, are readily apparent.