Xiguayuan Formation

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]

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

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