English: Suhongtu site, partial quarry map, locality map, and orientation data. A. Map of the central and northern portions of site showing the position of 12 of 13 skeletons. Skeletons 3 and 4 enlarged in Fig. 3. B. Fossil locality (41°17’ 10”N, 103°52’38”E) located 90 km northwest of Bayan Mod, InnerMongolia, China. C. Rose−diagram showing trends for skeletons (black, numbers denote skeleton count) and ripples (white). D. Mirror rose−diagram of elongated, isolated elements (n=13). Trends of skeletons have a strong, non−random (p<0.002) alignment to southeast. Flow direction of ripples is roughly perpendicular to that of elongate elements.