End-triassic extinction (Introduction)

by Balance_Maintained , U.S.A., Saturday, March 23, 2013, 07:15 (4264 days ago) @ David Turell

Bowring says the technique is good for directly dating rocks up to 35 million years old, but beyond that, it's unclear how reliable the technique can be. His team used astrochronology to estimate the age of the sedimentary rocks and then tested those estimates against high-precision dates from 200-million-year-old rocks in North America and Morocco...-..the geochronology and astrochronology techniques gave the team precise estimates for the onset of volcanism 200 million years ago...and revealed three bursts of magmatic activity over 40,000 years—-..The painstaking technique enabled the team to date the rocks to within approximately 30,000 years..-Hrmmmm methinks something is not quite right here... They used radiometric dating, which is near useless in volcanic rock due to complex processes that occur in the formation of them, astrochronology, which is only useful up to about 35my, and some how managed to come up with 'precise' dates? -Problems with radiometric dating in volcanic rock

--
What is the purpose of living? How about, 'to reduce needless suffering. It seems to me to be a worthy purpose.