Modern dating methods
They said the sample was contaminated with excess argon.
Using new samples of feldspar and pumice they ‘reliably dated’ the tuff at 2.61 million years, which agreed nicely.
As earlier in life, John Woodmorappe was intensely curious. He decided to major in both geology and biology because of the pivotal role of these two disciplines in the study of origins.
Then again, he had geology in his blood, as his grandfather had been a geologist who had owned an oil well (at Boryslaw, now in the western Ukraine).
Later, this date was confirmed by two other dating methods (paleomagnetism and fission tracks), and was widely accepted.