Xiguayuan Formation
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| Xiguayuan Formation | |
|---|---|
| Stratigraphic range: Barremian ~ | |
| Type | Geological formation |
| Underlies | Quaternary sediments |
| Overlies | Zhangjiakou Formation |
| Thickness | Up to 2,500 m (8,200 ft) |
| Lithology | |
| Primary | Conglomerate, sandstone, siltstone, mudstone |
| Other | Volcanic and pyroclastic sediments |
| Location | |
| Coordinates | 45°54′N 117°18′E / 45.9°N 117.3°E |
| Approximate paleocoordinates | 48°48′N 117°24′E / 48.8°N 117.4°E |
| Region | Hebei |
| Country | China |
  Xiguayuan Formation (China)  Xiguayuan Formation (Hebei) | |
The Xiguayuan Formation is an Early Cretaceous (Barremian) geologic formation in Hebei Province of China. Fossil ornithopod tracks have been reported from the formation.[1] It was deposited in a shallow lacustrine setting and is noted for its hyperpycnite facies.[2]