Hekou Group
The Hekou Group is a geological group in Gansu Province, China. It is Early Cretaceous in age. Dinosaur body fossils have also been recovered from the Hekou Group, including the iguanodont Lanzhousaurus and the titanosaurs Daxiatitan, Huanghetitan and Yongjinglong, and the nodosaur Taohelong. Fossil eggs are rare, but one oogenus, Polyclonoolithus, was discovered in the Hekou Group.[2] The group spans the Valanginian to Albian and can be subdivided into four formations.[1] Fossil pterosaur tracks have been recovered.
Hekou Group Stratigraphic range: Early Cretaceous,[1] Valanginian–Albian | |
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Type | Geologic group |
Sub-units | Huazhuang Formation, Hongkoucheng Formation, Yanguoxia Formation, Zhujiatai Formation |
Underlies | Unconformity: Minhe Formation |
Overlies | Unconformity: Xiangtang Formation |
Thickness | 3,700 m (12,100 ft) |
Lithology | |
Primary | Sandstone, mudstone, conglomerate |
Location | |
Coordinates | 35.9°N 103.3°E |
Approximate paleocoordinates | 34.8°N 103.1°E |
Region | Gansu |
Country | ![]() |
Extent | Longzhong Basin |
![]() ![]() Hekou Group (China) ![]() ![]() Hekou Group (Gansu) |
Vertebrate paleofauna
Pterosaurs
Pterosaurs | ||||
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Taxa | Presence | Description | Images | |
Ichnogenus: |
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References
- Xi, D.; Wan, X.; Li, G.; Li, G. (2018). "Cretaceous integrative stratigraphy and timescale of China". Science China Earth Sciences. 61: 1–31. doi:10.1007/s11430-017-9262-y.
- Xie, J.-F., Zhang, S.-K., Jin, X.-S., Li, D.-Q., and Zhou, L.-Q. (2016) "A new type of dinosaur eggs from Early Cretaceous of Gansu Province, China. Archived 2016-01-29 at the Wayback Machine" Vertebrata PalAsiatica, 54(1):1-10.
- Lockley, M.; Harris, J.D.; and Mitchell, L. 2008. "A global overview of pterosaur ichnology: tracksite distribution in space and time." Zitteliana. B28. p. 187-198. ISSN 1612-4138.
See also
- List of fossil sites
- List of dinosaur bearing rock formations
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