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To: Coyoteman
gave you existent dinosaur bones, something you said couldn't exist. True. I was not aware of those. But the article does not support your idea that they are of the same age as humans (ca. 5000 years). And this article shows they are about 69.1 ± 0.3 million years old. It also shows that: Microbeam PIXE has revealed that calcium and phosphorus are at reasonably expected concentrations in the analyzed dinosaur bone samples. However, significant amounts of iron, zinc, manganese, barium and strontium have been observed to be distributed throughout all dinosaur bone thin sections analyzed. Concentrations of many of these elements are at least an order of magnitude higher than those in modern reptilian and mammalian bones [emphasis added]. You still can't place humans and dinosaurs in the same time frame.

Those dates are assumptions by the evolutionists, believing that is when dinosaurs existed.

However, the issue of diagenesis, or the chemical changes that occur to fossil bone after it is buried (dissolution, recrystallization, replacement of bone by other minerals) raises doubts as to the value of the isotopic signal to interpret the physiology of ancient animals and the environmental constraints they lived under. The inherent assumption of stable istope anaylsis of ancient bone is that apatitic fossils are isotopically unaltered. This notion has been challenged by several scientists whose conclusions undermine current interpretations of dinosaur physiology and paleoenvironmental reconstructions based on stable isotope analysis.

77 posted on 05/27/2007 7:17:53 AM PDT by fortheDeclaration (We must beat the Democrats or the country will be ruined! -Abe Lincoln)
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To: fortheDeclaration
You use the paragraph beginning " However, the issue of diagenesis, or the chemical changes..." to show that the dating of those bones is incorrect, and that they are not about 69.1 ± 0.3 million years old.

Nice try. Read the article more closely.

Here is the pertinent passage:

A best age estimate is given at 69.1 ± 0.3 Ma using the weighted mean from K-Ar and 40Ar/39Ar analyses from several tephra units that bracket the dinosaur-bearing horizons.

They are not dating the bones, so the paragraph you quoted to show that chemical changes in the bones makes dating them inaccurate does not even apply.

They are dating tephra layers (volcanic ash) above and below the layers which contain the bones.

Conclusion: the bones are not contemporaneous with humans. They are off by about 69 million years.

78 posted on 05/27/2007 7:56:36 AM PDT by Coyoteman (Religious belief does not constitute scientific evidence, nor does it convey scientific knowledge.)
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