Xiguayuan Formation

Xiguayuan Formation
Stratigraphic range: Barremian ~129–125 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
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	45.9°N 117.3°E / 45.9; 117.3
Approximate paleocoordinates	48.8°N 117.4°E / 48.8; 117.4
Region	Hebei
Country	China
Xiguayuan Formation (China) Show map of China Xiguayuan Formation (Hebei) Show map of 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]

Fossil content

The formation has provided the following fossils:

Ichnofossils

• Iguanodontia indet.
• Theropoda indet.

Insects

• Gurvanomyia rohdendorfi
• Huaxiaplecia zhongguanensis
• Longhuaia orientalis

Bivalves

• Weichangella caelata

See also

• List of dinosaur-bearing rock formations
  • List of stratigraphic units with ornithischian tracks
    • Ornithopod tracks

References

1. Weishampel et al., 2004, pp.517-607
2. Dou et al., 2020

Bibliography

• Dou, Luxing; Hou, Jiagen; Song, Suihong; Zhang, Li; Liu, Yuming; Sun, Shuang; Li, Yongqiang; Wang, Xixin; Ren, Ying Tang and Heng Tian, Xiaoxu (2020), "Sedimentary characteristics of hyperpycnites in a shallow lacustrine environment: A case study from the Lower Cretaceous Xiguayuan Formation, Luanping Basin, Northeast China", Geological Journal, 55 (5): 3344–3360, Bibcode:2020GeolJ..55.3344D, doi:10.1002/gj.3599, ISSN 0072-1050
• Lockley, M. G.; Matsukawa, M. (1998), "Lower Cretaceous vertebrate tracksites of East Asia. In S. G. Lucas, J. I. Kirkland, and J. W. Estep (eds.), Lower and Middle Cretaceous Terrestrial Ecosystems", New Mexico Museum of Natural History and Science Bulletin, 14: 135–142
• Weishampel, David B.; Dodson, Peter; Osmólska, Halszka (2004), The Dinosauria, 2nd edition, Berkeley: University of California Press, pp. 1–880, ISBN 0-520-24209-2, retrieved 2019-02-21