title: Earliest presence of humans in northeast Asia.
abstract: The timing of the earliest habitation and oldest stone technologies in different regions of the world remains a contentious topic in the study of human evolution. Here we contribute to this debate with detailed magnetostratigraphic results on two exposed parallel sections of lacustrine sediments at Xiaochangliang in the Nihewan Basin, north China; these results place stringent controls on the age of Palaeolithic stone artifacts that were originally reported over two decades ago. Our palaeomagnetic findings indicate that the artifact layer resides in a reverse polarity magnetozone bounded by the Olduvai and Jaramillo subchrons. Coupled with an estimated rate of sedimentation, these findings constrain the layer's age to roughly 1.36 million years ago. This result represents the age of the oldest known stone assemblage comprising recognizable types of Palaeolithic tool in east Asia, and the earliest definite occupation in this region as far north as 40 degrees N.
authors.affiliation: Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100101, China. rxzhu@mail.c-geos.ac.cn
authors.forename: R X
authors.initials: RX
authors.lastname: Zhu
authors.forename: K A
authors.initials: KA
authors.lastname: Hoffman
authors.forename: R
authors.initials: R
authors.lastname: Potts
authors.forename: C L
authors.initials: CL
authors.lastname: Deng
authors.forename: Y X
authors.initials: YX
authors.lastname: Pan
authors.forename: B
authors.initials: B
authors.lastname: Guo
authors.forename: C D
authors.initials: CD
authors.lastname: Shi
authors.forename: Z T
authors.initials: ZT
authors.lastname: Guo
authors.forename: B Y
authors.initials: BY
authors.lastname: Yuan
authors.forename: Y M
authors.initials: YM
authors.lastname: Hou
authors.forename: W W
authors.initials: WW
authors.lastname: Huang
mesh_terms: D000818:Animals; D001106:Archaeology; D005075:Biological Evolution; D002681:China; D005580:Fossils; D019015:Geologic Sediments; D015186:Hominidae; D006801:Humans; D013995:Time