Figure 2: Lithologies and interpreted depositional facies of the Honggou section.

The Honggou section was subdivided into Lulehe, Xia Ganchaigou, Shang Ganchaigou, Xia Youshashan, Shang Youshashan and Shizigou Formations. Expanded columns illustrate major facies for each stratigraphic unit within the Honggou section. Facies code abbreviations are described in Supplementary Table 1.