Tuchengzi Formation
The Tuchengzi Formation (simplified Chinese:土城子组; traditional Chinese:土城子組; pinyin:Tǔchéngzǐ Zǔ) is a geological formation in China whose strata spans the Tithonian (Late Jurassic) to Berriasian (Early Cretaceous) ages. Dinosaur fossils, particularly footprints, have been found from the formation.