Discovery of dinosaur track fauna in Cretaceous from Zhongji, Shaanxi Province

In September 2017, the authors found abundant dinosaur and other tetrapod tracks on thin-layer purple red sandstone of Lower Cretaceous Luohe Formation at the northeast border of Ordos Basin in Zhongji Town, Shenmu City. They can be divided into tridactyl theropod tracks (Eubrontidae), didactyl theropod tracks (deinonychosaurian tracks), and small tetrapod tracks (Mammaliamorpha/Therapsida tracks). Such assemblage has never been found in China before and is of great significance to researches on paleoclimate, palaeoenvironment, paleogeography and stratigraphic correlation. Their detailed classification will be further studied.