@article {316086,
	title = {Chronology of the Acheulean to Middle Stone Age transition in eastern Africa},
	journal = {Science},
	year = {2018},
	month = {2018/03/15},
	abstract = {<p>The origin of the Middle Stone Age (MSA) denotes the transition from a highly persistent mode of stone toolmaking, the Acheulean, to a period of increasing technological innovation and cultural indicators associated with the evolution of Homo sapiens. Here we use 40Ar/39Ar and U-series dating to calibrate the chronology of Acheulean- and early MSA-rich sedimentary deposits in the Olorgesailie Basin, South Kenya Rift. We establish the age of late Acheulean tool assemblages from 615 to 499 ka, after which a large technological and faunal transition occurred, with definitive MSA lacking Acheulean elements beginning most likely by ~320 ka, but at least by 305 ka. These results establish the currently oldest repository of MSA in eastern Africa.</p>
},
	url = {http://science.sciencemag.org/content/early/2018/03/14/science.aao2216.abstract},
	author = {Deino, Alan L. and Behrensmeyer, Anna K. and Brooks, Alison S. and Yellen, John E. and Sharp, Warren D. and Potts, Richard}
}
