[shunyadragon]

</span><blockquote><span class="smallfont">Quote:</span><hr size="1" />Originally Posted by (fogus,)
</span><blockquote><span class="smallfont">Quote:</span><hr size="1" />Originally Posted by

I have not seen on (sic) sound arguement (sic) from AIG
<hr size="1" /></blockquote><span class='postcolor'>
Well, then I will give you one. Just pulling a random article from the AiG Creation magazine, the argument in it goes thus:

1. When uranium decays into lead helium is formed
2. Zircons are candidates for uranium lead dating
3. The age of the zircons obtained by radiometric dating is 1.5 billion years.
4. By analyzing the amount of helium left in the rocks an age of less than 14,000 years is obtained. More accurately the date on these rocks have been set at roughly 5,680 years (+/- 2000 years)

Also mentioned in the article is the fact that C14 remains in diamonds (supposed to be billions of years old) (limiting the age of the earth to under 58,000, and also found in other places that it shouldn’t have.

Telling me that you haven’t seen any sound arguments from AiG is, bluntly, either deliberate ignorance or willful dishonesty. The arguments abound, and the scientific evidence for them is powerfully convincing. Unless you already subscribe to the AiG TJ and or the Creation magazine, you should, as it is unfair that I can’t give you the full article, while (as I subscribe to the Scientific American) I can read the entire article. Reading from the opposite camp often changes our views.<hr size="1" /></blockquote><span class='postcolor'>

I live in China and I have had problemsaccessing some web sites as sources of radiometric dating methods, therefore there will be some delay responding to this from the point of view of an authority on the subject. The following are some thoughts from the point of view of geochemistry.

(1) Helium has never been a serious issue in radiometric dating of Uranium and the associated isotopes and elements that are the degradation products over time. It is the unstable elements and the major degradation products that are most important in measuring age. Scientists never use just one radioactive element and the resulting products to date rocks. Potassium - Argon is just one other very reliable dating method. Scientist are cautious because of contamination and the intrusin of other age materials into the rocks over time so the always use mutiple isotope datingmethods.

The accumulation of Helium in relatively shallow geologic formations may be to
the de gasing of deeper geologic formations deeper in the earth. It is logical that the Helium would accumulate in cooler shallow formation that are under less pressure and have lower permeabilities for the transmission of inert gases. I mentioned this before, but I did not make it clear what I was referring to.