His book, The Mythology of Modern Dating Methods, documents approximately 200 quotes by secular geologists indicating problems with the various dating methods.
Radiometric dating methods are the strongest direct evidence that geologists have for the age of the Earth.
Creationists admit that there is significant evidence of daughter isotopes well in excess of what could be generated by decay at contemporary observed rates within the timescale they contend to be true.
Some have proposed that the errors could be attributable to excess original daughter isotopes (though isochron dating methods minimize this) and accelerated decay caused by external phenomena.
As any first-year student of algebra soon learns, a single equation with two unknown variables cannot be solved.
In fact, the above formula is far too simple, because it assumes that the amount of daughter isotope was zero at start.
In addition to the above methods of dealing with this challenge, creationists have contended a whole raft of problems with both the older and newer methods of radiometric dating.
They cite several examples of discordant dates when multiple methods are tried on the same rock, many anecdotes of dating techniques giving obviously wrong data (including some where rock formed after 1900 was dated as being over 3 million years, such as at Mt.
While astronomers have found that magnetars emit radiation that could cause bouts of accelerated decay, and that these bouts may be more common than originally thought, the amount of heat produced by the radiation during the short period presents a problem for creationists.
A more common approach is to allow for accelerated nuclear decay during the early portion of terrestrial history, when those elements which decay naturally were buried far below the crust (or far below the waters of the global flood, in some models), therefore dealing with the heat problem.
The formula below is a proper model that admits the possibility that some daughter isotope was present when the rock formed: where D is the amount of daughter isotope present at start.