As we pointed out in these two articles, radiometric dates are based on known rates of radioactivity, a phenomenon that is rooted in fundamental laws of physics and follows simple mathematical formulas.Dating schemes based on rates of radioactivity have been refined and scrutinized for several decades.In a related article on geologic ages (Ages), we presented a chart with the various geologic eras and their ages.
A tree's growth rate changes in a predictable pattern throughout the year in response to seasonal climate changes, resulting in visible growth rings.
Each ring marks a complete cycle of seasons, or one year, in the tree's life.
It is also used in radiocarbon dating to calibrate radiocarbon ages.
New growth in trees occurs in a layer of cells near the bark.
Third, creationists ignore the evidence and deny that [X] exists altogether or assert that belief in a Young Earth is based on faith, not science. These ages weren't just made up — or, worse, accepted to "give evolution enough time".