Hasandong Formation

The Hasandong Formation is an Early Cretaceous (Aptian to Albian) geologic formation in South Korea. It has been dated to the late Aptian and earliest Albian, between 118.0 ± 2.6 Ma and 112.4  ± 1.3 Ma.[1] Dinosaur remains diagnostic to the genus level are among the fossils that have been recovered from the formation.[2] Tracks of the pterosaur ichnogenus Pteraichnus have also been recovered from the unit.[3]

Hasandong Formation Stratigraphic range: Aptian-Albian ~118.0–112.4 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Type	Geological formation
Unit of	Shindong Group
Underlies	Jinju Formation
Overlies	Nakdong Formation
Thickness	1200 metres
Lithology
Primary	Mudstone
Other	Shale, sandstone
Location
Coordinates	35.1°N 128.0°E / 35.1; 128.0
Approximate paleocoordinates	41.3°N 128.1°E / 41.3; 128.1
Region	North Gyeongsang Province
Country	South Korea
Hasandong Formation (South Korea)

Fossil content

late Early Cretaceous (105 Ma)

• Hadongsuchus acerdentis[4]
• Chiayusaurus asianensis? (possibly a synonym of Chiayusaurus lacustris) - "Tooth."[5]
• Pukyongosaurus milleniumi - "Cervical and dorsal vertebrae, ribs, limb and girdle elements."[5][6]

See also

• List of dinosaur-bearing rock formations
  • List of stratigraphic units with few dinosaur genera
• Seonso Conglomerate
• Haman Formation

References

1. Lee, Tae-Ho; Park, Kye-Hun; Yi, Keewook (October 2018). "Nature and evolution of the Cretaceous basins in the eastern margin of Eurasia: A case study of the Gyeongsang Basin, SE Korea". Journal of Asian Earth Sciences. 166: 19–31. doi:10.1016/j.jseaes.2018.07.004.
2. Weishampel, et al. (2004). "Dinosaur distribution." Pp. 517-607.
3. Y.-N. Lee, H.-J. Lee, J. and Y. Kobayashi. 2008. New pterosaur tracks from the Hasandong Formation (Lower Cretaceous) of Hadong County, South Korea. Cretaceous Research 29:345-353.
4. Y. Hangjae, Y. Yungnam, and Y. Hyesu. 2005. 경남 하동군 하산동층(전기 백악기)에서 산출된 악어 두개골의 골격학과 계통분류학적 연구 [A new protosuchian (Archosauria: Crocodyliformes) skull from the Hasandong Formation (Lower Cretaceous) of Hadong, Korea]. Korean Journal of Paleontology 21(1):146-150 (pdf at http://imgsvr.riss4u.net/contents3/td_contents8/09984/433/09984433.pdf)
5. "Table 13.1," in Weishampel, et al. (2004). Page 271.
6. Z. Dong, I. S. Paik, and H. J. Kim. 2001. A preliminary report on a sauropod from the Hasandong Formation (Lower Cretaceous), Korea. In T. Deng, Y. Wang (eds.), Proceedings of the Eighth Annual Meeting of the Chinese Society of Vertebrate Paleontology 41-53.

Bibliography

• Weishampel, David B.; Peter Dodson, and Halszka Osmólska (eds.). 2004. The Dinosauria, 2nd edition, 1–880. Berkeley: University of California Press. Accessed 2019-02-21. ISBN 0-520-24209-2