FIGURE 2. North China biochronology (1, above) and the stratigraphy and general biozonation applied to Yushe Basin, Shanxi Province (2, below). The Yushean mammal age supplants the Pliocene Jinglean and Youhean; Nihewanian is shown to be late Pliocene, in part. The classic biozones of Teilhard de Chardin and Trassaert (1937) have lithostratigraphic correlates. In the Nan Zhuang Gou area, the Gaozhuang and Mazegou formations, separated by a short hiatus, correspond to their Zone II. Gaozhuang and Mazegou assemblages differ at the species and generic levels. Wavy lines indicate depositional hiatuses. Figure modified from Flynn et al. (1997). Outcrop in middle of upper photo 0.5 km long.