These are radioactive elements that have a much longer half-life.
It would seem from these dates that the location of initial modern Homo sapiens evolution and the direction of their dispersion from that area is obvious. Since the early 1980's, there have been two leading contradictory models that attempt to explain.
By 115,000 years ago, early modern humans had expanded their range to South Africa and into Southwest Asia (Israel) shortly after 100,000 years ago.
There is no reliable evidence of modern humans elsewhere in the Old World until 60,000-40,000 years ago, Artifactual evidence indicates that modern humans were in Europe by at least 40,000 and possibly as early as 46,000 years ago.
Sometimes correlative dating is preferred over absolute dating, particularly with microfossils because the methods for absolute dating would destroy the fossil specimen.
The most common method of absolute dating is carbon dating.