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Jindong Formation 
Summary
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]
| Jindong Formation | |
|---|---|
| Stratigraphic range: Cenomanian ~ | |
| Type | Geological formation |
| Unit of | Hayang Group |
| Underlies | Yucheon Group (volcanics) |
| Overlies | Haman Formation |
| Lithology | |
| Primary | Mudstone, siltstone |
| Other | Sandstone, shale |
| Location | |
| Coordinates | 35°24′N 128°24′E / 35.4°N 128.4°E |
| Approximate paleocoordinates | 44°42′N 122°54′E / 44.7°N 122.9°E |
| Region | Gyeongsangnam-do |
| Country |  South Korea |
| Extent | Gyeongsang Basin |
  Jindong Formation (South Korea) | |
Lithology edit
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 edit
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 edit
References edit
- ^ 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. S2CID 135061525.
- ^ 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, doi:10.1016/j.cretres.2005.10.004
- ^ 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, doi:10.1016/j.cretres.2005.10.010
- ^ 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, doi:10.1080/10420940.2012.664059, S2CID 129058417
- ^ 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". 125: 104877. doi:10.1016/j.cretres.2021.104877.
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