Dating | The Smithsonian Institution's Human Origins Program Dating | The Smithsonian Institution's Human Origins Program

Why does radiometric dating work. Unreliability of radiometric dating and old age of the earth

It is clear that there is no increase in the values as a function of time.

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Examples include the mingling of waters from two streams, the mixing of sediment from two Why does radiometric dating work source rocks, and the contamination of lava from the mantle by interactions with the crustal rocks through which it travels to the surface.

Note, however, that even a 3 percent change in the decay constants of our radiometric clocks would still leave us with the inescapable conclusion that the Earth is more than 4 billion years old.

Radioactive decay would be faster in the bodies of stars, which is where scientists assume the heavy elements formed.

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There are key assumptions that we must accept in order for the method to be reliable. An effort is presently underway to bridge the gaps so as to have a reliable, continuous record significantly farther back in time. What is especially telling Cool fm dating cost this whole story is the conclusion of the absolute truth of the conclusion based on premises that are weak, or at least not adequately demonstrated.

The weighted mean of these two measurements is This makes them appear older. But isochrons might be able to account for pre-existing daughter elements.

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Dating the Cardenas Basalt, a layer near the bottom of Grand Canyon, and a volcanic layer from near the top of Grand Canyon produced an amazing result. However, this does not necessarily correlate to years because multiple rings can grow in one year. Age estimates on a given geological stratum by different radiometric methods are often quite different sometimes by hundreds of millions of years.

And quite a few other dates are often much, much farther off.

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Underwater turbidity currents are often interpreted as varves, but they form many layers rapidly. Let us consider again the claim that radiometric dates for a given geologic period agree with each other.

It is also being claimed that the standard deviations are not too large. Ground-water and erosional water movements could produce this effect naturally. Here is one such reference, although this is to a mineral that does not exclude argon: For example, one isochron yielded a date of 10 billion years.

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If you have ever taken a tour of a cave and seen water dripping from stalactites on the ceiling to stalagmites on the floor of the cave, you have seen carbonate deposits being formed. If such [excessive] ages as mentioned above are obtained for pillow lavas, how are those from deep-sea drilling out in the Atlantic where sea-floor spreading is supposed to be occurring?

Many sedimentary uranium ores are not.

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The study by Funkhouser and Naughton 51 was on the xenoliths, not on the lava. So the yearly layers of ice can be tracked by each of these five different indicators, similar to growth rings on trees.

Morris 92 claims that free neutrons might change decay rates, but his arguments show that he does not understand either neutron reactions or radioactive decay.

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There has been no loss or gain of the parent or daughter isotopes from the rock. After this came to light, Kelvin admitted that he might just as well have set his original upper limit on the age of the Earth at 4, Ma instead of Ma.

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As a result, living things, both plants and animals, ingest very small amounts of carbon, and lake and sea sediments take up small amounts of beryllium and chlorine They concluded by suggesting some unknown nuclear process which no longer operates to have generated the Ar.