Beyond that point, chapter by chapter, he leapfrogs his prehistoric report by orders of magnitude of years, tackling potassium-argon dating
and the ages of fossil hominids, molecular dating and divergence times for mammalian lineages, meteorites and the age of the solar system, and the use of color-magnitude diagrams for assessing ages of collections of stars.
Using potassium-argon dating
, (15) initial dates were around 2.
Geophysicist Michael McWilliams of Stanford University dated the Brunhes-Matuyama transition at 780,000 years ago using the argon-argon technique, a variation of the standard potassium-argon dating
An earlier paper on potassium-argon dating
in B'Or Ha'Torah 15 pointed out how defects could totally vitiate any possibility of a closed system.
While the most frequently quoted age for the traps falls around 60 million to 65 million years old, he says, other estimates, determined primarily from potassium-argon dating
, range from 80 million to 30 million years old.