Sisk Matthew L, Shea John J
Interdepartmental Doctoral Program in Anthropological Sciences, Stony Brook University, Stony Brook, NY 11794-4364, USA.
J Hum Evol. 2008 Sep;55(3):486-500. doi: 10.1016/j.jhevol.2008.05.016. Epub 2008 Aug 9.
The middle-late Pleistocene Kibish Formation of the Lower Omo Valley (Ethiopia) contains some of the oldest dated Homo sapiens fossils. Archaeological excavations at the Omo Kibish between 2002 and 2003 recovered numerous stone tools from extensive horizontal exposures of two sites, KHS (dated to 195+/-5 kyr) and BNS (dated to at least 104+/-7 kyr). Analysis of artifact distributions, lithic-debris densities, and refitting artifact sets sheds light on site-formation processes. Both localities reveal weak patterns of differentiation, and BNS seems to have a preferred refit orientation.
埃塞俄比亚下奥莫河谷的中晚更新世基比什组包含一些年代最久远的智人化石。2002年至2003年间在奥莫基比什进行的考古发掘，从KHS（年代测定为195±5 kyr）和BNS（年代测定至少为104±7 kyr）这两个地点广泛的水平暴露层中出土了大量石器。对 artifacts 分布、石屑密度和可拼接 artifact 组合的分析揭示了遗址形成过程。两个地点都显示出微弱的分化模式，并且BNS似乎有一个首选的拼接方向。
