Abstract: The Niutoushan (or Pulu) section, which was originally described by Du et al.(1988) as one of the stratotypes in erecting the"Daodi Formation", is located about one kilometer south of Pulu village, Yuxian county, and 1.2 km north of the Danangou section(Cai et al.,2004). Both the Niutoushan and the Danangou sections are on the east side of the highway connecting Xuanhua city to the Yuxian county seat.In addition to the Donggou section near the Qianjiashawa village, the Niutoushan section potentially represents the only other record of the Pliocene/Pleistocene boundary in the Nihewan district, as indicated by the presence of derived Mimomys cf.M. youhenicus. We remeasured the Niutoushan section to develop a more complete profile in 2005. The profile was original 43.18 m measured by Du et al.(1988). As a result of our fieldwork, the profile is now 82 m, with an additional 12 stratigraphic layers (11 to 23)(see Fig.1). Small mammals were collected from Layers 3,6,9,12,15 and 16 by screen-washing(see Table 1). The mammals from each layer represent one faunal complex with some species spanning multiple layers.

摘要： 牛头山(=铺路)剖面6个含化石层位中，第3、6、9和第12层为晚上新世，第15、16层为早更新世。晚上新世以Hypolagus, Nannocricetus mongolicus,Sinocricetus progressus, Mesosiphneus, Pliosiphneus, Pseudomeriones complicidens,Micromys tedfordi等的最后绝灭为特征；早更新世以Allophaiomys deucalion, Yangia等的出现为特征。根据岩石地层和小哺乳动物组合分析，该剖面上新世／更新世界限应在第12—13层之间。根据动物组合或动物群的对比，将牛头山剖面、钱家沙洼村的洞沟剖面与小水沟剖面、东窑子头村的大南沟剖面及稻地村的老窝沟剖面的不同层位进行了时代排序。