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Originally posted by rhinoceros
Originally posted by edmc^2
Evolutionists liked this idea because it seems to support their premise but of course we know that it DOES NOT.
Radiometric dating - How does it work?.
Uranium-Lead dating provides a good example of this. Zircon (zirconium silicate (ZrSiO4) is a common mineral in igneous rocks such as granite. When magma cools and crystallizes, zircon crystals formed will often contain trace amounts of uranium in place of zirconium. Lead, however, will be strongly rejected by the crystallizing zircon, as has been demonstrated in laboratory experiments.
As uranium decays over millions of years, it eventually turns into lead. Uranium-238 decays to lead-206 with a half-life of 4.47 billion years, and uranium-235 decays to lead-207 with a half-life of 704 million years. Measuring the proportion of lead to uranium thus provides a very accurate date when the rock solidified. Since there are two uranium isotopes and two lead isotopes with two different half lives, this method of dating also checks itself, providing two calculable ages for each sample.
What you're, however, proposing is that the rock solidifies and then much later engulfs animal remains? Really? How exactly would that work? There's a beach in Portugal where you can see dinosaur bone remains inside gigantic stones. Are you saying that there's a way that these bones made it inside the stones millions of years after they solidified? You should go there someday to see with your own eyes. I don't really see the point of this line of argument anyway. Clearly you're not arguing for young Earth since you acknowledge that at least the rocks themselves are millions to billions of years old. Also, quite the coincidence that e.g. rocks from the Pompei ruins don't date to millions of years, huh?edit on 23-7-2012 by rhinoceros because: (no reason given)
Rocks at the surface of the Earth are of many different ages, ranging from over 3 billion years old to less than 1 million years old. Because under ordinary circumstance matter can neither be created or destroyed, the new, younger rocks must have originated from older crustal material - older rocks. Older rocks are destroyed by weathering processes and the remains are recycled into new rocks. This cycle from old rocks to new rocks is called the rock cycle.