Tuchengzi Formation
| Tuchengzi Formation Stratigraphic range: Tithonian-Berriasian, 154–139 Ma |
|
|---|---|
| Type | Geological formation |
| Underlies | Zhangjiakou Formation |
| Overlies | Tiaojishan Formation |
| Thickness | 870-2900 meters |
| Lithology | |
| Primary | Shale |
| Other | Sandstone |
| Location | |
| Region | Asia |
| Country |
 China
|
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.
The Tuchengzi Formation was deposited during a time of transition between the Daohugou Biota and the Jehol biota. The Tuchengzi represents a poorer, more arid climate that appears to have caused much of the Daohugou fauna to become extinct. They would later be replaced by the Jehol biota when conditions became more favorable to a diversity of terrestrial animal life.
Indeterminate sauropod remains formerly attributed to the Mamenchisauridae and Brachiosauridae have been found in Liaoning, China. Theropod tracks, including those made by avialans, have been found in Liaoning, China.
C. youngi
"Partial skull with mandible, cervicals, humerus, and scapula."
A primitive ceratopsian
Grallator isp.
Footprints belonging to the Grallator form taxon, made by an unknown small theropod.
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