title: African Homo erectus: old radiometric ages and young Oldowan assemblages in the Middle Awash Valley, Ethiopia.
abstract: Fossils and artifacts recovered from the middle Awash Valley of Ethiopia's Afar depression sample the Middle Pleistocene transition from Homo erectus to Homo sapiens. Ar/Ar ages, biostratigraphy, and tephrachronology from this area indicate that the Pleistocene Bodo hominid cranium and newer specimens are approximately 0.6 million years old. Only Oldowan chopper and flake assemblages are present in the lower stratigraphic units, but Acheulean bifacial artifacts are consistently prevalent and widespread in directly overlying deposits. This technological transition is related to a shift in sedimentary regime, supporting the hypothesis that Middle Pleistocene Oldowan assemblages represent a behavioral facies of the Acheulean industrial complex.
authors.affiliation: Department of Anthropology, University of California, Berkeley 94720.
authors.forename: J D
authors.initials: JD
authors.lastname: Clark
authors.forename: J
authors.initials: J
authors.lastname: de Heinzelin
authors.forename: K D
authors.initials: KD
authors.lastname: Schick
authors.forename: W K
authors.initials: WK
authors.lastname: Hart
authors.forename: T D
authors.initials: TD
authors.lastname: White
authors.forename: G
authors.initials: G
authors.lastname: WoldeGabriel
authors.forename: R C
authors.initials: RC
authors.lastname: Walter
authors.forename: G
authors.initials: G
authors.lastname: Suwa
authors.forename: B
authors.initials: B
authors.lastname: Asfaw
authors.forename: E
authors.initials: E
authors.lastname: Vrba
mesh_terms: D000818:Animals; D005002:Ethiopia; D005580:Fossils; D005844:Geology / Q000266:history; D049690:History, Ancient; D015186:Hominidae / Q000033:anatomy & histology*; D006801:Humans; D012886:Skull / Q000033:anatomy & histology