title: Dates for the middle stone age of East Africa.
abstract: Three potassium-argon age determinations on sanidine from crystalrich pantellerite and volcanic ash in the Main Rift Valley of central Ethiopia indicate that the Middle Stone Age of East Africa began prior to 180,000 years ago. This suggests that the technological developments which characterize the Middle Stone Age have a far greater antiquity than previously estimated.
authors.forename: F
authors.initials: F
authors.lastname: Wendorf
authors.forename: R L
authors.initials: RL
authors.lastname: Laury
authors.forename: C C
authors.initials: CC
authors.lastname: Albritton
authors.forename: R
authors.initials: R
authors.lastname: Schild
authors.forename: C V
authors.initials: CV
authors.lastname: Haynes
authors.forename: P E
authors.initials: PE
authors.lastname: Damon
authors.forename: M
authors.initials: M
authors.lastname: Shafiqullah
authors.forename: R
authors.initials: R
authors.lastname: Scarborough