Jindong Formation Explained

Jindong Formation
Type:Geological formation
Age:Cenomanian
~
Period:Cenomanian
Prilithology:Mudstone, siltstone
Otherlithology:Sandstone, shale
Region:Gyeongsangnam-do
Coordinates:35.4°N 128.4°W
Paleocoordinates:44.7°N 122.9°W
Unitof:Hayang Group
Underlies:Yucheon Group (volcanics)
Overlies:Haman Formation
Extent:Gyeongsang Basin

The Jindong Formation 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.

Paleontology

The area has many dinosaur and bird tracks. It contains Hadrosauropodus kyoungsookimi, the first trackway of a quadrupedal ornithopod discovered in Korea.[2]

See also

Notes and 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. en. 166. 19–31. 10.1016/j.jseaes.2018.07.004. 2018JAESc.166...19L . 135061525 .
  2. 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. 10.1016/j.cretres.2021.104877. free.