"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).And it does not work on rocks or thoroughly mineralized fossils; it is only useful for relatively well-preserved organic materials such as cloth, wood, and other non-fossilized materials.Other methods must be used to estimate the age of rocks and minerals.The speed of the disintegration process is measured.A portion of the material is ground up and a measurement is made of the ratio of radioactive “parent” atoms to the decomposition products.
Argon is a colorless and odorless noble gas with the atomic number of 18 and the chemical symbol Ar.
Age estimates which are obviously wrong or contradictory are sometimes produced.
A popular and supposedly foolproof method was used on two lava flows in the Grand Canyon that should be ideal for radioactive age estimation. Young basalt rock at the Canyon's top produced an age estimate 270 million years older than ancient basalt rock at the Canyon's bottom.
Theoretically, Creationism remains workable within a wide range of age estimates.
Scientists have proposed numerous age estimation methods.