Montana relative age dating
From this they estimate the amount of helium that should be produced, and from these they can calculate how much helium is being added to the atmosphere over a given amount of time.They also know how much helium is currently in the atmosphere.It also strongly suggests that something happened around 4,500 to Note also that it is possible for trees to produce more than one growth ring per year, which would shorten the above estimated ages of these trees.Also, with regard to fossil tree rings, the author has been unable to find any documented instances of fossil trees having more than about 1500 rings.
Taken together, they suggest that the earth is quite young -- probably less than 10,000 years old.
Therefore scientists must make a guess with regard to what they believe the original conditions might have been.
The shorter the time involved, the more likely that a specific process has been constant, and unaltered by external influences.
All of the proposed theories as to where it came from have serious problems.
It is a complete mystery unless it was designed that way from the beginning.