Radiometric Dating Radiometric Dating

Radiometric dating notes, a response to “scientific” creationism

Thus it is clear that argon enters rock easily. Well, standard scientific procedure is to collect more data to test the possible explanations -- is it the time scale or the data that are incorrect? It is clear that there is no increase in the values as a function of time.

For most geological samples like this, radiometric dating "just works". But what is this age based on?

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He states that geologists are aware of this problem, and make allowances for it. The Bearpaw Formation is a marine unit that occurs over much of Alberta and Saskatchewan, and it continues into Montana and North Dakota in the United States, although it adopts a different name in the U.

Besides the papers mentioned here, there are hundreds, if not thousands, of similar papers providing bracketing ranges for fossil occurrences. Many dates give values near the accepted ones. Specifically, he proposes an age of We have already mentioned dendrochronology tree ring dating above.

But then it is claimed that we can detect leaching and heating. By correlating the rings with dead wood found near the trees and beams from local buildings, a chronology of 11, rings has been suggested.

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It was based on the idea that Radiometric dating notes significant source of novel heat energy was affecting the Earth. The earth is supposed to be nearly 5 billion years old, and some of these methods seem to verify ancient dates for Dating scan for pregnancy of earth's igneous rocks.

Geologic time is divided up into periods, beginning with the Precambrian, followed by the Cambrian and a number of others, leading up to the present. And quite a few other dates are often much, much farther off. There is no way for a geologist to choose what Radiometric dating notes value a radiometric date will yield, or what position a fossil will be found at in a stratigraphic section.

An hourglass can be used to tell time only if we know how much sand was in each chamber at the beginning, that there was no sand added or removed from either chamber, and that the sand falls at a constant rate.

The different types of layers are summarized in Table III. I doubt it very much. If a lava flow lies above geologic period A and below B, then allowable ages are anything at least as large as A and no larger than B. Because this type of decay involves a particle outside the nucleus, the decay rate may be affected by variations in the electron density near the nucleus of the atom.

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Here is another quote from Woodmorappe about isochrons, since some people think that mixing scenarios or other age-altering scenarios are unlikely: It has been claimed that this can be accomplished by preheating samples under vacuum or by leaching them briefly with hydroflouric acid, or both Also, samples taken a few feet apart can give ages that differ by many hundreds of millions of years.

The presence of fission tracks and radiohalos in crystals demonstrates that hundreds of millions of years worth of radioactive decay has occurred in a very short period. Look again at the isochron for the meteorite Juvinas Figure 3.

There are well over forty different radiometric dating methods, and scores of other methods such as tree rings and ice cores.

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A challenge to this interpretation came in the form of Lord Kelvin's William Thomson's calculations of the heat flow from the Earth, and the implication this had for the age -- rather than hundreds of millions of years, the Earth could be as young as tens of million of years old.

What I am more interested in is the fossil-bearing geologic column of Cambrian and later age. A Triassic, Jurassic and Cretaceous time scale.

Over a long period of time, adsorbed argon will tend to diffuse into the rock, and thus it will be possible for even more argon to be deposited on the surface, increasing K-Ar ages even more. This is from a paper by Austin available at ICR.

It is impossible to know to what degree the parent and daughter products have been added to or removed from the rocks over the alleged millions or billions of years. Geochronologists are aware that excess argon may accumulate on mineral surfaces and the surface argon would be removed before analysis.

He simply gives the correct value for the K-Ar system.

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This dating method relies on measuring certain isotopes produced by cosmic ray impacts on exposed rock surfaces. As one answer to his critics, Kelvin produced a completely independent estimate -- this time for the age of the Sun.

Dinosaurs were found after the first occurrence of land plants, insects, and amphibians.