Tuchengzi Formation
| Tuchengzi Formation | |
|---|---|
| Stratigraphic range: Tithonian-Berriasian ~ | |
| Type | Geological formation |
| Underlies | Zhangjiakou Formation |
| Overlies | Tiaojishan Formation |
| Thickness | 870–2,900 metres (2,850–9,510 ft) |
| Lithology | |
| Primary | Shale |
| Other | Sandstone, mudstone |
| Location | |
| Coordinates | 42°54′N 124°00′E / 42.9°N 124.0°E |
| Approximate paleocoordinates | 44°06′N 126°06′E / 44.1°N 126.1°E |
| Region | Beijing, Hebei, Liaoning |
| Country | China |
| Type section | |
| Named for | Tuchengzi, Beipiao, Liaoning |
| Named by | Chao-Chi Lin |
| Year defined | 1942 |
The Tuchengzi Formation (formerly known as Tucheng Conglomerate, from Chinese: 土城子; pinyin: Tǔchéngzǐ) is a geological formation in China whose strata span the Tithonian (Late Jurassic) to Berriasian (Early Cretaceous) ages. Dinosaur fossils, particularly footprints, have been found from the formation.