In any fossil site, dating the site is essential to understanding the site’s significance, because chronological data permits comparisons with materials from other sites, and ultimately enables regional settlement patterns, migration, or evolutionary rates to be determined. A dating method’s ability to date significant fossil materials directly rather than just dating associated sedimentary or rock units adds to its archaeological and paleontological utility. Electron spin resonance (ESR) dating can provide chronometric ages for vertebrate teeth throughout the Pleistocene and late Pliocene. For mollusc shells and coral, ESR’s effective dating range spans much of the Pleistocene.