Radiocarbon dating calculation

It is clear that the sedimentary rock was deposited and folded before the dyke was squeezed into place.

Carbon-14 is produced in the upper atmosphere when cosmic rays bombard nitrogen atoms.Working with several collaboraters, Libby established the natural occurrence of radiocarbon by detecting its radioactivity in methane from the Baltimore sewer.In contrast, methane made from petroleum products had no measurable radioactivity.As explained below, the radiocarbon date tells us when the organism was alive (not when the material was used).This fact should always be remembered when using radiocarbon dates.

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