Fig. 1 in Floian, Early Ordovician, trilobites from the Olongbluk Terrane, northwest China

Fig. 1. The Ordovician palaeogeographic units of the Qilian and Qaidam regions (modified from Zhu et al. in press) (A), location of the Shihuigou section of Delingha, north Qinghai Province (B), and photograph of the middle part of the Duoquanshan Formation at the Shihuigou section and percentage data of trilobites from the sample SHG215a (C).