other isotope pairs cover intermediate time periods between the spans for carbon 14 and uranium.
Some radiometric dating methods depend upon knowing the initial amount of the isotope subject to decay.
Geology, University of Delaware 1971 Stafford, Thomas W., Jr.
(1982) Isolation of proline and hydroxyproline from fossil bone.
However, it quickly became clear that something wasn’t quite right.
‘As is always the case, a new dating technique comes along and everyone latches onto it,’ explains Walker.
Based at the University of Wales Trinity St David, he has devoted his career to studying the Quaternary period – the last 2.6 million years and the so-called ‘age of humans’.There are about two dozen decay pairs used for dating.Uranium 235 decay to lead has a half-life of 713 million years, so it is well suited to dating the universe. T., Zabel, T., Donahue, D., Duhamel, R., Brendel, K., Haynes, C. (1984) Holocene age of the Yuha burial: direct radiocarbon determinations by accelerator mass spectrometry. (1987) Study of bone radiocarbon dating accuracy at the University of Arizona NSF accelerator facility for radioisotope analysis.