Geological and archeological survey in recent years has recovered a large number of dinosaur footprint fossils near two villages of Langanbao,  Shenmu County, Shaanxi Province. Fossil footprints of these two sites are not only abundant but also different from each other. There were also different from previously fossil footprints in the Shenmu area. The fossiliferous strata at the two footprint sites are of Early Jurassic and Middle Jurassic age, older than strata containing previously reported footprints in the Shenmu area and other parts of Shaanxi Province.