Carbon 14 dating fossils

Petrification happens when the organic material is slowly replaced by minerals. Making a fossil is tricky and the conditions have to be just right.

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We found exactly that in almost 50 samples taken from throughout the geologic column.For example, preliminary analyses of fossil bones reveal carbon-13 to carbon-12 ratios very similar to ratios found in modern bones, despite the fact that carbon-13 is very rare.What are the odds that contaminating processes from different locations would coincidentally produce the precise carbon-13 to carbon-12 ratios that mimic fresh bones?No measurable amounts should exist in samples older than about 100,000 years because radiocarbon atoms would decay into nitrogen-14 before then.However, we keep finding carbon-14 in materials designated as tens or even hundreds of millions of years old.

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