Hekou Group
Stratigraphic range: Early Cretaceous,[1]
TypeGeologic group
Sub-unitsHuazhuang Formation,
Hongkoucheng Formation,
Yanguoxia Formation,
Zhujiatai Formation
UnderliesUnconformity: Minhe Formation
OverliesUnconformity: Xiangtang Formation
Thickness3,700 m (12,100 ft)
Lithology
PrimarySandstone, mudstone, conglomerate
Location
Coordinates35°54′N 103°18′E / 35.9°N 103.3°E / 35.9; 103.3
Approximate paleocoordinates34°48′N 103°06′E / 34.8°N 103.1°E / 34.8; 103.1
RegionGansu
Country China
ExtentLongzhong Basin
Hekou Group is located in China
Hekou Group
Hekou Group (China)
Hekou Group is located in Gansu
Hekou Group
Hekou Group (Gansu)

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.

Vertebrate paleofauna

Pterosaurs

Pterosaurs
Taxa Presence Description Images

Ichnogenus:
  • Found near Yanguoxia, Gansu Province.[3]
    • Specimens housed at the Dinosaur Tracks Museum, of the University of Colorado at Denver.[3]

    Sinamia lanzhoensis amiiform fish

    References

    1. 1 2 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.
    2. ↑ 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.
    3. 1 2 3 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

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