title: Obsidian dating and East african archeology.
abstract: New experimental procedures have made it possible to establish specific hydration rates for the numerous compositional types of obsidian to be found at archeological sites in Kenya. Two rates are applied to artifacts from the Prospect Farm site, revealing a history of occupation extending back 120,000 years.
authors.forename: J W
authors.initials: JW
authors.lastname: Michels
authors.forename: I S
authors.initials: IS
authors.lastname: Tsong
authors.forename: C M
authors.initials: CM
authors.lastname: Nelson