Ziliujing Formation

The Ziliujing Formation is a geological formation in China, It is Early Jurassic in age. It is part of the stratigraphy of the Sichuan Basin. The dinosaur Gongxianosaurus and indeterminate theropod material are known from the Dongyuemiao Member of the formation, as well as dinosaur footprints, Zizhongosaurus and indeterminate prosauropods from the Da'anzhai Member. The basal sauropod Sanpasaurus is known from the Maanshan Member. The basal ornithschian Archaeocursor is known from the formation. A possible unnamed stegosaur and the pliosauroid plesiosaur Sinopliosaurus are also known from this formation but they were found an indeterminate member. An unnamed teleosaurid known from a complete skull has also been found in the formation, pending a formal description. The deposition environment during the Da'anzhai Member in the lower Toarcian is thought to have been that of a giant freshwater lake encompassing the whole of the Sichuan basin, around 3 times larger than Lake Superior, coeval with the Toarcian Oceanic Anoxic Event around 183 Ma. The Sinemurian-Pliensbachian boundary event has been recorded on the top of the Dongyuemiao Member, while lower parts of this member are of Earliest Sinemurian age.

Paleofauna

Dinosaurs

Theropods

Didactyl tracks, that are interpreted as either artifact of preservation or Dromaeosauridae convergent, are found at Wucha Village.

Genus	Species	Location	Section	Material	Notes	Images
Elaphrosaurinae?	Indeterminate	Kuantsaishan, Houchiatsun	Maanshan Member	IVPP V.138, Four vertebrae and a distal part of a metatarsus	Indeterminate remains of theropods with resemblance to the genus Elaphrosaurus, initially thought to be a member of Coeluridae.
Eubrontes	E. zigongensis cf. E. giganteus E. isp.	Gulin County, Sichuan Province Shaba tracksite Wuli site	Daanzhai Member Ma'anshan Member Zhenzhuchong Member	Footprints	Theropod footprints of uncertain affinity, probably related to theropods such as Dilophosaurus
Grallator	G. ssatoi G. isp.	Dongyuemiao tracksite, Sichuan Province Gulin County, Sichuan Province Hejie site, Sichuan Province Wucha Village Wuli site	Daanzhai Member Maanshan Member	Footprints	Theropod footprints of uncertain affinity. The Grallator relationships of these tracks are solid, as they don't display features of other ichnogenera found in the early Jurassic of the same region. Includes some of the smallest Grallator tracks ever described in the literature.
Neotheropoda	Indeterminate	Shibei Township, Gongxian County	Dongyuemiao Member	Isolated Teeth Isolated Vertebrae	Indeterminate remains of theropods, very common along Gongxianosaurus fossils.