Jindong Formation

Jindong Formation
Stratigraphic range: Cenomanian ~99.9 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
Type	Geological formation
Unit of	Hayang Group
Underlies	Yucheon Group (volcanics)
Overlies	Haman Formation
Lithology
Primary	Mudstone, siltstone
Other	Sandstone, shale
Location
Coordinates	35.4°N 128.4°E / 35.4; 128.4
Approximate paleocoordinates	44.7°N 122.9°E / 44.7; 122.9
Region	Gyeongsangnam-do
Country	South Korea
Extent	Gyeongsang Basin
Jindong Formation (South Korea)

The Jindong Formation (Korean: 진동층; Hanja: 鎭東層; RR: Jindong-cheung) is a geological formation located in South Korea. It dates to the Cenomanian stage of the Late Cretaceous, with a maximum depositional age of 99.9 ± 0.7 Ma.^[1]

Lithology

The formation is a thick layering of fine-grained, altered volcaniclastic sediments. Most of these sediments are ash-rich mudstone, siltstone, and very fine sandstone. There is also coarser sandstone, conglomerate, carbonates, and ash tuff. ^[2]

Paleontology

The area has many dinosaur and bird tracks.^[3] It contains Hadrosauropodus kyoungsookimi, the first trackway of a quadrupedal ornithopod discovered in Korea.^[4][5]

See also

• List of fossil sites

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. Bibcode:2018JAESc.166...19L. doi:10.1016/j.jseaes.2018.07.004. S2CID 135061525.
2. Houck, Karen J.; Lockley, Martin G. (February 2006), "Life in an active volcanic arc: Petrology and sedimentology of dinosaur track beds in the Jindong Formation (Cretaceous), Gyeongsang Basin, South Korea" (PDF), Cretaceous Research, 27 (1): 102–122, Bibcode:2006CrRes..27..102H, doi:10.1016/j.cretres.2005.10.004
3. Lockley, Martin G.; Houck, Karen J.; Yang, Seong-Young; Matsukawa, Masaki; Lim, Seong-Kyu (February 2006), "Dinosaur-dominated footprint assemblages from the Cretaceous Jindong Formation, Hallyo Haesang National Park area, Goseong County, South Korea: Evidence and implications" (PDF), Cretaceous Research, 27 (1): 70–101, Bibcode:2006CrRes..27...70L, doi:10.1016/j.cretres.2005.10.010
4. Lim, Jong-Deock; Lockley, Martin G.; Kong, Dal-Yong (March 19, 2012), "The Trackway of a Quadrupedal Ornithopod from the Jindong Formation (Cretaceous) of Korea", Ichnos, 19 (1–2), Taylor & Francis Group: 101–104, Bibcode:2012Ichno..19..101L, doi:10.1080/10420940.2012.664059, S2CID 129058417
5. Yoon, Han Sang; Lee, Yuong-Nam; Jung, Seung-Ho; Kong, Dal-Yong; Kim, Su-Hwan; Son, Minyoung (2021). "A juvenile ornithopod-dominated tracksite from the Lower Cretaceous Haman Formation, South Korea". Cretaceous Research. 125: 104877. doi:10.1016/j.cretres.2021.104877.