OW. I just heard Aron Ra say they used “potassium-lead” dating (to date Cretaceous amber from Burma) .
Since he was just talking about zircons, it would have been either uranium-lead or thorium-lead. But more to the point, potassium cannot possibly decay into lead.
Owlmirror says
OW. I just heard Aron Ra say they used “potassium-lead” dating (to date Cretaceous amber from Burma) .
Since he was just talking about zircons, it would have been either uranium-lead or thorium-lead. But more to the point, potassium cannot possibly decay into lead.
Owlmirror says
And, indeed, the reference the paper [Mummified precocial bird wings in mid-Cretaceous Burmese amber] uses is titled:
Shi, G. et al. Age constraint on Burmese amber based on U-Pb dating of zircons. Cret. Res. 37, 155–163 (2012).
Owlmirror says
Whoops. Looks like I goofed up which paper they were referencing.
It was actually A mid-Cretaceous enantiornithine (Aves) hatchling preserved in Burmese amber with unusual plumage (preprint PDF).
But it used the same reference for the dating method as the paper I linked above @#2.
Sean Boyd says
He doesn’t believe? But…but…there’s a big gay landlocked ARK and everything!