“…It was initially best known for its long paleontological sequence (Teilhard de Chardin and Piveteau, 1930;Qiu, 2000;Cai et al, 2013), but numerous Early Pleistocene archaeological sites have been discovered since the 1970s as well (You et al, 1980;Wei and Xie, 1989;Xie et al, 2006). During the past decades, more than 60 Paleolithic sites associated with Mode 1 stone tools (i.e., core and flake assemblages) have been found in the basin (Xie et al, 2006;Keates, 2010;Yuan et al, 2011;Liu et al, 2013), and a series of early sites have now been dated between the upper boundary of the Olduvai normal subchron and the Matuyama-Brunhes geomagnetic reversal (1.78-0.78 Ma) (e.g., Zhu et al, 2001Zhu et al, , 2003Zhu et al, , 2004Wang et al, 2005;Deng et al, 2006bDeng et al, , 2007Ao et al, 2010aAo et al, , 2013aLiu et al, 2010).…”