Radio argon dating
The atmosphere has a mass of about 5.15 three quarters of which is within about 11 km (6.8 mi; 36,000 ft) of the surface.
The atmosphere becomes thinner and thinner with increasing altitude, with no definite boundary between the atmosphere and outer space.
How are these processes used to estimate the age of rocks?
The principle is similar to that used with Carbon-14.
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The atmosphere of Earth is the layer of gases, commonly known as air, that surrounds the planet Earth and is retained by Earth's gravity.
A radioactive form of potassium is found in minute quantities in some rocks.
"It is obvious that radiometric techniques may not be the absolute dating methods that they are claimed to be.
Age estimates on a given geological stratum by different radiometric methods are often quite different (sometimes by hundreds of millions of years).
Theoretically, Creationism remains workable within a wide range of age estimates.
Scientists have proposed numerous age estimation methods.Steven Austin rightly wonders, "Has anyone successfully dated a Grand Canyon rock? The validity of the calculated date can be no stronger than the weakest link (weakest assumption) used in the calculation.